ΑΣΚΗΣΗ 4 η L 1 L 2 L 3. «Εκκίνηση και Ρύθμιση στροφών Ασύγχρονων Τριφασικών κινητήρων με μεταβολή της συχνότητας της τάσης τροφοδοσίας»

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1 ΑΣΚΗΣΗ 4 η «Εκκίνηση και Ρύθμιση στροφών Ασύγχρονων Τριφασικών κινητήρων με μεταβολή της συχνότητας της τάσης τροφοδοσίας» Χρησιμοποιούμενα Όργανα Ασύγχρονος Τριφασικός Κινητήρας Φορτίο (Ηλεκτρομαγνητική πέδη) Inverter Τριφασικός Τροφοδοτικό DC Βατόμετρα () Βολτόμετρα (1) Αμπερόμετρα (1) Στροφόμετρο Ροπόμετρο Καλώδια συνδέσεων INVERTER Τροφοδοσία πέδης - L 1 L L 3 + V W 1 Α W + Πέδη Ασύγχρονος Τριφασικός Κινητήρας n M 41

2 Σκοπός Άσκησης Σκοπός αυτής της εργαστηριακής άσκησης είναι: Η κατανόηση, μέσω της πειραματικής διαδικασίας, υλοποίησης της μεθόδου εκκίνησης και ρύθμισης στροφών ενός Ασύγχρονου Τριφασικού κινητήρα, με μεταβολή της συχνότητας της τάσης τροφοδοσίας Η γνωριμία με διατάξεις (Inverters), που μπορούν να μεταβάλλουν τη συχνότητα και το μέγεθος της τάσης τροφοδοσίας ενός Ασύγχρονουυ Τριφασικού κινητήρα Η κατανόηση, μέσω της πειραματικής διάταξης, της ομαλής εκκίνησης του κινητήρα με μεταβολή της τάσης τροφοδοσίας Η κατανόηση, μέσω της πειραματικής διάταξης, της μεταβολής των στροφών του κινητήρα από μηδενικές τιμές έως και τιμές διπλάσιες, μέσω της μεταβολής της συχνότητας της τάσης τροφοδοσίας Η κατανόηση, μέσω της πειραματικής διάταξης, του γιατί ο λόγος τάσης προς συχνότητα, πρέπει κατά κανόνα, για συχνότητες κάτω των 50 Hz, να παραμένει σταθερός Η κατανόηση, μέσω της πειραματικής διάταξης, του γιατί η τάση τροφοδοσίας πρέπει να παραμένει σταθερή για μεταβολή της συχνότητας πάνω από τα 50 Hz Η κατανόηση των πλεονεκτημάτων αυτής της μεθόδου, ως μια σύχρονη μέθοδο για την εκκίνηση και ρύθμιση των στροφών Ασύγχρονων Τριφασικών κινητήρων 4

3 ΘΕΩΡΗΤΙΚΟ ΜΕΡΟΣ Η χαρακτηριστική ροπής στροφών (σχέση επαγόμενης ροπής στο δρομέα και στροφών ή ολίσθησης του δρομέα) του Ασύγχρονου Τριφασικού κινητήρα, Βραχυκυκλωμένου δρομέα ή Δακτυλιοφόρου δρομέα, περιγράφεται από την επόμενη σχέση: M IND = ω sync ( R TH 3 V + R TH R s ) s + ( X TH + X ) (4.1) όπου: V TH X M X + X 1 M V ϕ M, RTH R1 X1+ X M X, X TH X 1 (4.) Στις προηγούμενες σχέσεις τα στοιχεία R 1, R, X 1, X, X M λέγονται παραμετρικά στοιχεία του κινητήρα και περιγράφουν το ανά φάση ισοδύναμο κύκλωμά του, που φαίνεται στη συνέχεια (Σχήμα 4.1). o V + ϕ o I 1 R 1 j X 1 I o M j X M I o j X R s - Σχήμα 4.1 Ανά φάση ισοδύναμο κύκλωμα Ασύγχρονου Τριφασικού κινητήρα όπου: o o ϕ φασική τάση σε Volt (μέτρο και γωνία) V = V ϕ 0 I o 1 = I 1 ϕ R 1 Χ 1 X M X R s φασικό ρεύμα σε Amp (μέτρο και γωνία) ανά φάση ωμική αντίσταση των τυλιγμάτων του στάτη (Ω) ανά φάση αντίδραση διαρροής του πεδίου του στάτη (Ω) ανά φάση αντίδραση αμοιβαίας επαγωγής στάτη δρομέα (Ω) ανηγμένη στο στάτη, ανά φάση αντίδραση διαρροής του μαγνητικού πεδίου του δρομέα (Ω) ανηγμένη στο στάτη, ανά φάση ωμική αντίσταση των τυλιγμάτων του δρομέα (Ω) ολίσθηση του κινητήρα 43

4 Η παραπάνω χαρακτηριστική, όπως προκύπτει και από τη σχέση (4.1), εκφράζεται συναρτήσει των παραμετρικών στοιχείων του κινητήρα, της ολίσθησης (ή των στροφών) του και της τάσης τροφοδοσίας του και απεικονίζεται στο επόμενο Σχήμα 4.. Ροπή (Nm) M IND M ΜΑΧ Ονοµαστικό σηµείο λειτουργίας M START M N n m = 0 s = 1 n Mmax s Mmax Σχήμα 4. Χαρακτηριστική ροπής στροφών Ασύγχρονου Τριφασικού κινητήρα n N n m = n sync. s = 0 Στροφές ανά λεπτό Η ροπή εκκίνησης, η μέγιστη ροπή και η ολίσθηση (ή οι στροφές) στις οποίες εμφανίζεται η μέγιστη ροπή του κινητήρα δίνονται από τις επόμενες εξισώσεις: M START 3 V R = (4.3) ω sync TH [( R + R ) + ( X + X ) ] TH TH M MAX = ω sync 3 V TH [ RTH + RTH + ( X TH + X ) ] (4.4) s M max R =, n M = ( 1 sm max ) nsync RTH + ( X TH + X ) max (4.5) Οι στροφές του μαγνητικού πεδίου του κινητήρα (ή αλλιώς σύγχρονες στροφές), δίνονται από την επόμενη σχέση: n sync f = 10 (f η συχνότητα και P οι μαγνητικοί πόλοι) (4.6) P Οι στροφές του δρομέα εξαρτώνται από τις στροφές του μαγνητικού πεδίου, ως εξής: n = ( 1 s) (s η ολίσθηση του κινητήρα) (4.7) m n sync 44

5 Έλεγχος της ταχύτητας με μεταβολή της Συχνότητας του δικτύου Από την εξίσωση (4.6) είναι φανερό ότι, όταν μεταβάλλεται η συχνότητα της τάσης τροφοδοσίας, μεταβάλλονται και οι στροφές του μαγνητικού πεδίου και κατ επέκταση και οι στροφές του δρομέα (εξίσωση 4.7). Η συχνότητα της τάσης τροφοδοσίας των 50 Hz λέγεται βασική ή ονομαστική συχνότητα λειτουργίας, δηλαδή f Ν = 50 Hz, ενώ ταχύτητα (ή στροφές) του μαγνητικού πεδίου, που αντιστοιχούν στη βασική συχνότητα λέγεται βασική ταχύτητα. Με τον έλεγχο επομένως της συχνότητας είναι δυνατόν να ρυθμίζεται και η ταχύτητα (στροφές) πάνω και κάτω από τη βασική ταχύτητα. Στη βασική συχνότητα λειτουργίας αντιστοιχεί και η ονομαστική τάση λειτουργίας του κινητήρα V N = 400 Volt. Η ρύθμιση της ταχύτητας του Ασύγχρονου Τριφασικού κινητήρα μπορεί να ξεκινάει από 5% της βασικής ταχύτητας μέχρι και τιμές διπλάσιες της βασικής. Είναι όμως απαραίτητο, όπως θα δούμε στη συνέχεια, για αυτές τις μεταβολές της συχνότητας να καθοριστούν και κάποια όρια για την τάση και τη ροπή, για την ασφαλή λειτουργία του κινητήρα. Με τη μεταβολή της συχνότητας της τάσης τροφοδοσίας (συνηθέστερος σήμερα και πλέον αποδοτικός τρόπος ελέγχου των Ασύγχρονων Τριφασικών κινητήρων), επιτυγχάνεται συνεχής ρύθμιση σε μια ευρεία περιοχή λειτουργίας. Με τη μέθοδο αυτή ο έλεγχος των στροφών επιτυγχάνεται με τη μεταβολή της συχνότητας f της τάσης τροφοδοσίας, διατηρώντας την τάση σταθερή για συχνότητες μεγαλύτερες της βασικής συχνότητας, ενώ για συχνότητες μικρότερες της βασικής, μεταβάλλεται η τάση τροφοδοσίας όταν μεταβάλλεται η συχνότητα και ο τρόπος μεταβολής της εξαρτάται από τα χαρακτηριστικά που θέλουμε να πετύχουμε, όσον αφορά την προσαρμογή της ροπής του κινητήρα με την απαιτούμενη από το φορτίο ροπή. Στη συνέχεια βλέπουμε τρεις χαρακτηριστικής περιπτώσεις σχέσεις τάσης συχνότητας, ανάλογα με τα χαρακτηριστικά ροπής στροφών που θέλουμε να πετύχουμε. 1 η περίπτωση: (γραμμική σχέση τάσης συχνότητας με σταθερή τάση στις πολύ μικρές συχνότητες) Στο επόμενο Σχήμα 4.3α, παρουσιάζεται η τυποποιημένη ή γενικής εφαρμογής σχέση τάσης συχνότητας. Στην περίπτωση αυτή η τάση τροφοδοσίας μεταβάλλεται γραμμικά με τη μεταβολή της συχνότητας μέχρι τα 50 Hz (μέχρι δηλαδή τη βασική συχνότητα). Πάνω από τα 50 Hz η τάση πρέπει υποχρεωτικά να παραμείνει σταθερή για την ασφάλεια του κινητήρα. Η μικρή περιοχή σταθερής τάσης για πολύ μικρές συχνότητες απαιτείται για να μπορέσει ο κινητήρας να αναπτύξει ροπή. Θα πρέπει να σημειωθεί ότι η μαγνητική ροή του μαγνητικού πεδίου του Ασύγχρονου Τριφασικού κινητήρα, που προκύπτει σύμφωνα με το νόμο του Faraday, από μια 45

6 εφαρμοζόμενη εναλλασσόμενη τάση u( t) = U sin(ωt) = U sin(π f t), περιέχει το λόγο τάσης προς συχνότητα και περιγράφεται από την επόμενη εξίσωση 4.8. dϕ( t) VM Vrms u( t) = N ϕ( t) = cos(ωt) ϕ( t) ~ (4.8) dt π f N f M M V rms (Volt) V N f N = f (Hz) Σχήμα 4.3α Σχέση τάσης - συχνότητας Στο Σχήμα 4.3β φαίνονται, αντίστοιχα, οι χαρακτηριστικές ροπής στροφών του Ασύγχρονου Τριφασικού κινητήρα για συχνότητες κάτω και πάνω από τα 50 Hz. M IND (Nm) f N = 50 Hz f < f N f > f N f (Hz) n m = 0 (s = 1) n sync.n Σχήμα 4.3β Χαρακτηριστικές ροπής στροφών για μεταβολές της συχνότητας κάτω και πάνω από τα 50 Hz 46

7 η περίπτωση: (γραμμική σχέση τάσης συχνότητας με δύο κλίσεις από 0 έως 30 Hz και από Hz Στο επόμενο Σχήμα 4.4α, παρουσιάζεται η σχέση τάσης συχνότητας, που χρησιμοποιείται για φορτία με μεγάλη ροπή εκκίνησης. V rms (Volt) V N 0 30 f N = f (Hz) Σχήμα 4.4α Σχέση τάση - συχνότητας Στην περίπτωση αυτή η τάση τροφοδοσίας μεταβάλλεται γραμμικά για συχνότητες κάτω από τα 50 Hz, αλλά η κλίση της για συχνότητες κάτω από τα 30 Hz είναι μικρότερη. Έτσι για κάθε δεδομένη συχνότητα η τάση εξόδου θα είναι μεγαλύτερη της αντίστοιχης τάσης της 1 ης περίπτωσης. Αυτή η αύξηση της τάσης μας δίνει αυξημένη ροπή κατά την εκκίνηση αλλά έχουμε το μειονέκτημα του αυξημένου μαγνητικού κορεσμού και του αυξημένου ρεύματος μαγνήτισης, τα οποία είναι αποδεκτά για μικρές χρονικές περιόδους. Οι αντίστοιχες χαρακτηριστικές ροπής στροφών φαίνονται στο Σχήμα 4.4β για μεταβολές της συχνότητας κάτω από τα 50 Hz. Για συχνότητες πάνω από τα 50 Hz ισχύουν τα ίδια με την 1 η περίπτωση. M IND (Nm) f N = 50 Hz f < f N f (Hz) n m = 0 (s = 1) n sync.n Σχήμα 4.4β Χαρακτηριστικές ροπής στροφών για της συχνότητας κάτω από τα 50 Hz 47

8 3 η περίπτωση: (παραβολική σχέση τάσης συχνότητας) Στο Σχήμα 3.5α, παρουσιάζεται η σχέση τάσης συχνότητας, που χρησιμοποιείται για φορτία με χαμηλής ροπή εκκίνησης. V rms (Volt) V N 0 f N = f (Hz) Σχήμα 4.5α Σχέση τάσης συχνότητας Σε αυτή την περίπτωση η τάση μεταβάλλεται παραβολικά με τη συχνότητα για συχνότητες μικρότερες των 50 Hz. Για κάθε δεδομένη συχνότητα, κάτω από τα 50 Hz, η τάση θα είναι μικρότερη της 1 ης και ης περίπτωσης. Έτσι λόγω της μειωμένης τάσης η παραγόμενη ροπή είναι μικρότερη γεγονός που μας προσφέρει ομαλή εκκίνηση για φορτία που απαιτούν χαμηλή ροπή στο ξεκίνημα. Οι αντίστοιχες, για αυτή την περίπτωση, χαρακτηριστικές ροπής στροφών φαίνονται στο επόμενο Σχήμα 4.5β, για συχνότητες, όπως προηγουμένως, κάτω από τα 50 Hz. Για συχνότητες πάνω από τα 50 Hz ισχύουν τα ίδια με την 1 η και η περίπτωση. M IND (Nm) f N = 50 Hz f < f N f (Hz) n m = 0 (s = 1) n sync.n Σχήμα 4.5β Χαρακτηριστικές ροπής στροφών για της συχνότητας κάτω από τα 50 Hz 48

9 ΠΕΙΡΑΜΑΤΙΚΟ ΜΕΡΟΣ ΔΟΜΗ ΑΣΚΗΣΗΣ 1. ΣΥΝΔΕΣΜΟΛΟΓΙΑ ΑΣΚΗΣΗΣ. ΠΙΝΑΚΕΣ ΜΕΤΡΗΣΕΩΝ ΚΑΙ ΥΠΟΛΟΓΙΣΜΩΝ 1 η περίπτωση Συχνότητα f e = 40 Hz n sync. = U S = Μετρούμενα μεγέθη Μεγέθη για υπολογισμό Ι Κ (Α) Μ OUT (Nm) n m (rpm) W 1 (Watt) W 1 (Watt) P IN (Watt) P OUT (Watt) η% cosφ,6,3 1,7 1,4 η περίπτωση Συχνότητα f e = 50 Hz n sync. = U S = Μετρούμενα μεγέθη Μεγέθη για υπολογισμό Ι Κ (Α) Μ OUT (Nm) n m (rpm) W 1 (Watt) W 1 (Watt) P IN (Watt) P OUT (Watt) η% cosφ,6,3 1,7 1,4 49

10 3 η περίπτωση Συχνότητα f e = 60 Hz n sync. = U S = Μετρούμενα μεγέθη Μεγέθη για υπολογισμό Ι Κ (Α) Μ OUT (Nm) n m (rpm) W 1 (Watt) W 1 (Watt) P IN (Watt) P OUT (Watt) η% cosφ,6,3 1,7 1,4 3. ΣΧΕΣΕΙΣ ΥΠΟΛΟΓΙΣΜΟΥ ΜΕΓΕΘΩΝ 4. ΓΡΑΦΙΚΕΣ ΠΑΡΑΣΤΑΣΕΙΣ 1) ροπής στροφών, με παράμετρο τη συχνότητα της τάσης τροφοδοσίας του κινητήρα ) ισχύος εξόδου στροφών με παράμετρο τη συχνότητα της τάσης τροφοδοσίας του κινητήρα 3) ρεύματος στροφών, με παράμετρο τη συχνότητα της τάσης τροφοδοσίας του κινητήρα 6. ΣΧΟΛΙΑ ΚΑΙ ΣΥΜΠΕΡΑΣΜΑΤΑ 50

11 ΕΡΩΤΗΣΕΙΣ 1. Πώς δημιουργείται το στρεφόμενο μαγνητικό πεδίο στον ασύγχρονο τριφασικό κινητήρα;. Για τον κινητήρα της άσκησης να σχεδιάσετε πώς μεταβάλλεται το μαγνητικό του πεδίο στις 360 μοίρες του στάτη και να αιτιολογήσετε τη μορφή του. 3. Πότε η τάση τροφοδοσίας του ασύγχρονου τριφασικού κινητήρα μένει σταθερή και πότε μεταβάλλεται, όταν μεταβάλλεται η συχνότητά της. Να αιτιολογήσετε την απάντησή σας. 4. Γιατί όταν αυξάνεται το μηχανικό φορτίο του κινητήρα, αυτός αναγκάζεται να αυξήσει τη ροπή στον άξονά του; 5. Από τι εξαρτάται και γιατί η συχνότητα των τάσεων και ρευμάτων εξ επαγωγής στο δρομέα ενός ασύγχρονου τριφασικού κινητήρα; 51

12 ΟΔΗΓΙΕΣ Σε θάζε περίπηφζε ρύζκηζες ζα περηγράυεηε ηης παρακέηροσς ποσ τρεζηκοποηήζαηε κε ηελ ζεηρά έφς όηαλ θηάζεηε ζηελ επηζσκεηή ηηκή. Θα γίλεηαη έιεγτος από ηολ σπεύζσλο ηοσ εργαζηερίοσ θαη κεηά ζα επηζηρέθεηε πίζφ ζηελ αρτηθή ρύζκηζε ποσ είτε ηο INVERTER, πρηλ ηελ δηθή ζας παρέκβαζε. Π.τ. 1. Η ηατύηεηα ηοσ θηλεηήρα λα θηάλεη έφς 70 Hz Παηάκε P ζηελ οζόλε r0007 παηάκε ηα βειάθηα, βρίζθοσκε ηελ P0310, κε βειάθηα βάδοσκε.. θιπ Να γίλεη παρακεηροποίεζε ηοσ Inverter έηζη ώζηε: 1. Η ηατύηεηα ηοσ θηλεηήρα λα θηάλεη έφς 70 Hz.. Ο τρόλος εθθίλεζες ηοσ θηλεηήρα λα είλαη 15 sec. 3. Ο τρόλος επηβράδσλζες ηοσ θηλεηήρα λα είλαη 0 sec. 4. Το Inverter λα θόυεη ηολ θηλεηήρα από σπερέληαζε. 5. Το Inverter λα θόυεη ηολ θηλεηήρα από σπέρηαζε. 6. Το Inverter λα γσρίζεη ζηης εργοζηαζηαθές ρσζκίζεης. 7. Σηελ οζόλε ηοσ Inverter λα εκθαλίδοληαη οη ζηροθές ηοσ θηλεηήρα.

13 Instruction Boletín de Directives Bulletin instrucciones d'utilisation VVDED39906USR05/03 05/003 Raleigh, NC, USA ALTIVAR 8 Adjustable Speed Drive Controllers User s Guide Variadores de velocidad ajustable Guía del usuario Variateurs de vitesse Guide de l utilisateur Retain for future use. Conservar para uso futuro. À conserver pour usage ultérieur.

14 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming and Setup Factory Settings The ATV8 drive controller is preset for most constant torque applications. Table 16 lists the factory settings. Table 16: Function Display Factory Settings Setting When stopped: Drive ready When running: Reference frequency Base frequency 50 Hz; 60 Hz for 575 V models [1] Motor voltage Acceleration and deceleration ramps Low speed High speed 30 V, 400 V, or 575 V depending on the model 3 s 0 Hz Frequency loop gain 33 Motor thermal current DC braking current at stop Operation Logic inputs Analog inputs Relay R Analog output Deceleration ramp adaptation Switching frequency 50 Hz; 60 Hz for 575 V models Nominal drive controller current 0.7 times the nominal drive controller current for 0.5 s Constant torque with sensorless flux vector control run directions (LI1, LI) 4 preset speeds (LI3, LI4): 0 Hz, 5 Hz, 5 Hz, 50 Hz AI1: 0 to +10 V reference AI (0 to +10 V) or AIC (0 to 0 ma) summed with AI1 Speed reference reached 0 0 ma, motor frequency Automatic in the case of overvoltage when braking 4 khz [1] To change base frequency to 60 Hz, see page 57. To modify these adjustments, use the keypad to change the parameter settings. The following section explains the keypad and parameters. 55

15 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming and Setup 05/003 Using the Keypad Display Altivar 8 Te DR Red LED: powered up (DC bus voltage) Returns to the previous menu or parameter, or increases the displayed value z rdy ESC ENT 4 seven-segment displays Enters a menu or a parameter, or saves the displayed parameter or value Goes to the next menu or parameter, or decreases the displayed value Exits a menu or parameter, or aborts the displayed value to return to the previous value in the memory Figure 16: Keypad Display NOTE: Pressing or does not store the choices. To store the displayed choice, press ENT. The display flashes when a value is stored. The following codes appear on the display when the drive controller is operating under normal conditions, with no fault present: Init: Initializing rdy: Drive controller ready xx.x: Frequency reference (for example, 43.0) dcb: DC injection braking in progress rtry: Automatic restart in progress nst: Freewheel stop command FSt: Fast stop command 56

16 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming and Setup Access to Menus First power-up or after a return to factory settings (FCS) Subsequent power ups -bfr ENT bfrr configuration [1] ENT rdy Base frequency: 50 Hz (factory setting) or 60 Hz [1] Display of drive controller status ENT SEt- drc- I-0- SUP ESC Settings ESC ESC Drive I/O ESC Display Wait 3 seconds If it is not possible to access the SEt-, drc-, or I/O menus, the drive controller is protected by an access code. A remote display mounting option (part no. VW3A8101, see page 83) or test and commissioning software (part no. VW3A8104, see page 84) may be necessary to access these menus. See SUP- menu on page 73. Figure 17: Access to Menus [1] The proper setting of parameter bfr is important because it affects many other drive controller functions. In 08/30 V and 400/460 V models, this parameter is factory set to 50 Hz. When commissioning one of these models for use on a 60 Hz system, first perform a factory parameter reset (see parameter FCS on page 66) and then adjust bfr to 60. Since 575 V models are only rated for 60 Hz, parameter bfr is not displayed. 57

17 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming and Setup 05/003 Access to Parameters There are three types of parameters: Display: Values displayed by the drive controller. Adjustment: Can be changed during operation or when the controller is stopped. Configuration: Can only be modified when the controller is stopped and the motor is not braking. Parameters can be displayed during operation. Menu SEt- ENT ESC Parameter -YYY -UUU Next parameter ENT ESC Value or assignment 100 ESC ENT 1 flash (save) ESC Figure 18: Access to Parameters 58

18 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes PROGRAMMING CODES Adjust Menu SEt- [1] Code Assignment Adjustment range -LFr Speed reference via the remote keypad display module (see page 83). This parameter appears on the remote keypad display mounting option when control of the drive controller via the display module is enabled: LSP to HSP LCC parameter in I/O menu. -rpi PI reference. This parameter appears when analog input AIC/AI is assigned to the internal PI function (AIC = PII), and LCC = no. -rot Direction of rotation. This parameter appears when the start/stop potentiometer option is present (see page 8). It defines the direction of rotation for the option s run button. For - rrs - forward: For, - reverse: rrs -ACC -dec -AC -de Acceleration ramp time for motor to go from 0 Hz to FrS. Deceleration ramp time for motor to go from FrS to 0 Hz. nd acceleration ramp time nd deceleration ramp time These parameters are accessible when the ramp switching threshold (Frt parameter in the drc- menu) is other than 0 Hz or when a logic input is assigned to ramp switching. 0.0 to 100.0% to 3600 s 0.0 to 3600 s 0.0 to 3600 s 0.0 to 3600 s Factory setting -LSP Low speed 0 to HSP 0 Hz -HSP High speed: ensure that this setting is appropriate for the motor and the LSP to tfr bfr application. -ItH 08/30 and Current used for motor thermal protection. Set ItH to the full load 400/460 V: 0.0 amperes marked on the motor nameplate. to 1.15 In [] In (A) [] To disable thermal protection, increase the value to the maximum (nth 575 V: 0.50 to displayed) In [] For 3 s 3 s 5 s 5 s The parameters in shaded boxes appear if the corresponding functions have been configured in the drc- or I/O- menus. [1] When commissioning the ATV8 drive controller (except 575 V models), ensure that parameter bfr is properly set before making adjustments in the SET menu (see page 57). [] In is the nominal drive controller current shown in Tables 1 4 (pages 11 13) and on the drive controller nameplate. 59

19 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 Adjust Menu SEt- (continued) Code -UFr -SLP -FLG -IdC -tdc Assignment Adjustment range Optimizes the torque at very low speed 0 to 100% Adjusts slip compensation for fine tuning of speed regulation. This parameter only appears when parameter UFt = n in the drc- menu. Frequency loop gain Linked to the inertia and the resistive torque of the driven mechanism: - machines with high resistive torque or high inertia: gradually reduce the gain in the range of 33 to 0 - machines with fast cycles, low resistive torque and low inertia: gradually increase the gain in the range of 33 to 100. Too high a gain can result in operating instability. Level of DC injection braking current. If tdc is set to continuous, after 5 seconds the injection current is peak limited at 0.5 ItH. See page 59 for ItH and page 69 for LI assignment. DC injection standstill braking time When the time is increased to 5.5 s, Cont is displayed. The DC injection is then continuous at standstill. See page 69 for LI assignment. 0.0 to 5.0 Hz 0 to 100% 33 Factory setting 0 (30/ 460 V) 15 (575 V) According to controller output 0.1 ItH to In [1] 0.7 In [1] 0 to 5.4 s Cont. -JPF Skip frequency prevents prolonged operation at a frequency range of +/- Hz around JPF. This function avoids a critical speed which leads to 0 to HSP 0 Hz resonance. Setting the function to 0 renders it inactive. -JOG Jog operating frequency 0 to 10 Hz 10 Hz -rpg PI regulator proportional gain [] 0.01 to rig PI regulator integral gain [] 0.01 to 100/s 1/s -FbS PI feedback multiplication coefficient [] 0.1 to s The parameters in shaded boxes appear if the corresponding functions have been configured in the drc- or I/O- menus. [1] In is the nominal drive controller current shown in Tables 1 4 (pages 11 13) and on the drive controller nameplate. [] See page 69. AIC must be assigned to PII or PIA for this parameter to appear on the display. 60

20 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes Adjust Menu SEt- (continued) Code Assignment Adjustment range Factory setting -PIC Assigns PI Regulator to direct acting or reverse acting. Selecting YES reverses the PI corrective action relative to the feedback. This does not affect motor rotation direction. no - YES no no: normal, YES: reverse [] -SP nd preset speed LSP to HSP 10 Hz -SP3 3 rd preset speed LSP to HSP 15 Hz -SP4 4 th preset speed LSP to HSP 0 Hz -SP5 5 th preset speed LSP to HSP 5 Hz -SP6 6 th preset speed LSP to HSP 30 Hz -SP7 7 th preset speed LSP to HSP 35 Hz -Ftd Motor frequency threshold beyond which relay R energizes 0 to HSP bfr -Ctd 0.1 ItH to Current threshold beyond which relay R energizes 1.5 In [1] 1.5 In [1] -ttd Motor thermal state threshold beyond which relay R energizes 1 to 118% 100% -tls Low speed operating time Following operation at LSP for a defined period, a motor stop is requested automatically. In -wire control, the motor restarts when the frequency reference is greater than LSP and a run command is still present. In 3-wire control, another run command must be given to restart. Caution: value 0 disables this function 0 to 5.5 s 0 (disabled) The parameters in shaded boxes appear if the corresponding functions have been configured in the drc- or I/O- menus. [1] In is the nominal drive controller current shown in Tables 1 4 (pages 11 13) and on the drive controller nameplate. [] See page 69. AIC must be assigned to PII or PIA for this parameter to appear on the display. 61

21 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 Drive Menu drc- NOTE: Except for 575 V models, ensure that parameter bfr is properly set before making adjustments in the drc menu. Code -UnS -FrS -tun Parameters Frt, SFr, nrd and SdS can be adjusted with the drive controller running. The drive controller must be stopped and locked to modify all other parameters. To optimize drive performance, enter the values given on the nameplate and perform an auto-tune operation (on a standard asynchronous motor). Assignment Nominal motor voltage marked on the rating plate. The adjustment range depends on the drive controller model: ATV8H MU ATV8H N4U ATV8H S6XU Nominal motor frequency marked on the rating plate. Auto-tuning: Only active for Uft parameter settings of n and nld. Performing an auto tune is recommended when a new motor is connected to the drive controller. - no: nominal motor values will be used in motor control algorithms. - done (auto-tuning completed): measured motor values will be used in motor control algorithms. - YES: starts auto-tuning When auto-tuning is completed, rdy is displayed. On returning to tun, done is displayed. If the fault tnf appears, check that the motor is connected correctly. If the connection is correct, the motor may not be suitable for the n or nld settings of the UFt parameter. Set UFt to L or P (see page 63). Note: Auto-tuning operation will only be performed if no run or braking command has been activated. When a freewheel or fast stop function is assigned to a logic input, this input must be set to 1 (active at 0). Adjustment range 00 to 40V 380 to 500 V 55 to 575 V 40 to 400 Hz no-done-yes Factory setting 30 V or 400 V if bfr = 50; [1] 30 V or 460 V if bfr = 60; 575 V on ATV8 S6XU models FrS = bfr setting [1] no [1] See page 57 for information on setting bfr. 6

22 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes Drive Menu drc- (continued) Code -tfr -UFt -bra -Frt -SFr -nrd Assignment Maximum output frequency Selection of the motor control method - L: constant torque for motors connected in parallel or special motors - P: variable torque - n: sensorless flux vector control for constant torque applications - nld: energy saving, for variable torque applications Automatically increases the deceleration time if it is set at too low a value for the inertia of the load, thus preventing an ObF fault. no: function inactive. YES: function active. This function may not be compatible with position control on a ramp or with the use of a braking resistor. Ramp switching frequency When the output frequency exceeds Frt, the ramp times switch to the settings of AC and de. When Frt = 0, the function is inactive. This parameter does not appear when a logic input is assigned to the ramp switching function rp. Switching frequency Adjust to reduce audible noise generated by the motor. Above 4 khz, derate the drive controller output current: up to 1 khz: derate by 10% above 1 khz: derate by 0% This function randomly modulates the switching frequency to reduce the motor noise. no: function inactive. YES: function active. Adjustment range 40 to 400 Hz L - P - n - nld no - YES Factory setting 60 / 7 Hz (1. x bfr) n YES 0 to HSP 0 Hz to 15 khz 4.0 no - YES YES Parameter adjustable during operation. 63

23 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 Drive Menu drc- (continued) WARNING UNINTENDED EQUIPMENT OPERATION If Automatic Restart can is active, only be R1 used will for only machines indicate or a fault installations after the that restart present sequence no has danger timed in out. the event of automatic restarting, either for Failure personnel to follow or equipment. this instruction can result in death, serious injury, or equipment If Automatic damage. Restart is active, R1 will only indicate a fault after the restart sequence has timed out. Equipment operation must conform with national and local safety regulations. Failure to follow these instructions can result in death, serious injury, or equipment damage. Code -Atr Assignment Automatic restart after the drive controller is disabled by a fault (if the fault has disappeared and the other operating conditions permit the restart). The restart is performed by a series of automatic attempts separated by increasingly longer waiting periods: 1 s, 5 s, 10 s, then 1 min for each subsequent attempt. If the restart has not taken place after 6 min, the procedure is aborted and the drive controller remains disabled until power is cycled. Automatic restart is possible only after the following faults: OHF, OLF, USF, ObF, OSF, PHF, OPF, SLF. (The drive controller fault relay R1 does not indicate a fault until the restart sequence has timed out.) The speed reference and the run command must be maintained for the drive controller to restart the motor after the fault is cleared. This function can only be used in -wire control (tcc = C). In 3-wire control (tcc = 3C) the fault will be reset only. - no: Function inactive - YES: Function active - USF: Function only active for the USF fault Adjustment range no - YES - USF Factory setting no 64

24 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes Drive Menu drc- (continued) Code -OPL -IPL -StP -FLr -drn Adjustment Assignment range Enables the motor phase failure fault. (Set OPL to OAC when using a disconnect between the drive controller and the motor. Three-phase detection will be disabled.) - no: function inactive. - YES: function active. - OAC: Single phase detection only. Enables the line supply phase failure fault. no: function inactive. YES: function active. This parameter does not exist on models ATV8HU09MU, U18MU, no - YES U9MU, and U41MU for a single-phase line supply. With IPL set to YES, the detection of this fault is only enabled when the motor is loaded to approximately 70% of its nominal value. Controlled stop on loss of line supply: Controls motor stopping when line supply is lost, following a ramp that automatically adapts according to the braking energy returned by the no - YES motor. - no: function inactive. - YES: function active. Enables catch on the fly into a spinning motor after the following events: - loss of line supply or power off - fault reset or automatic restart no - YES - freewheel stop or injection stop with logic input no: function inactive. YES: function active. Lowers the tripping threshold of the USF fault to operate on a line supply down to 60% of nominal line voltage. no: function inactive. YES: function active: NOTE: A line reactor must be used. The drive controller may not perform within specification when operating below 50% of nominal line voltage. Factory setting no - YES - OAC YES no - YES YES no no no 65

25 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 Drive Menu drc- (continued) Code -SdS -FCS Adjustment Assignment range Scale factor for the display parameter SPd (-SUP menu), used to scale a value in proportion to the output frequency, the machine speed, or the motor speed. For example: 4-pole motor, 1800 rpm at 60 Hz: -SdS = 30 -SPd =1800 at 60 Hz Return to factory settings no: no YES: the next display will be InIt, then bfr (start of the menus). no - YES bfr does not appear in 575 V units after a return to factory settings. The value of LCC will not be restored to it s factory setting. 1 to Factory setting no Parameter can be adjusted during operation. 66

26 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes I/O MenuI-0- I/O parameters can only be modified when the drive controller is stopped and no run command is present. The functions are defined in Configurable Logic and Analog I/O Functions on page 45. When commissioning the ATV8 drive controller (except the 575 V models), ensure that parameter bfr is properly set before making adjustments in the I/O menu. See page 57. WARNING UNINTENTIONAL EQUIPMENT OPERATION Verify that tcc is set for the desired configuration before activating the drive controller. Failure to follow this instruction can result in death, serious injury, or equipment damage. 67

27 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 I/O Menu I-0- (continued) Code -tcc Factory Assignment setting Configuration of terminal block control: -wire or 3-wire control. C = -wire; 3C = 3-wire; OPt = start/stop potentiometer option (see page 8), operation is then identical to 3-wire control. -wire control (maintained contact): The state of the input (open or closed) controls running or stopping. At power up, the forward or reverse input must transition from low to high before the drive will start the motor if automatic restart is not assigned. Wiring example: LI1: forward LIX: reverse ATV8 4 V LI1 LIx 3-wire control (momentary contact): Only one pulse is needed to control start-up. Wiring example: ATV8 LI1: stop 4 V LI1 LI LIx LI: forward LIx: reverse C Note: Changing the assignment of tcc returns the logic inputs to factory setting: tcc = C: LI1: Forward, cannot be reassigned LI: rrs (Reverse) LI3: PS LI4: PS4 tcc = 3C: LI1: Stop, cannot be reassigned LI: For (Forward), cannot be reassigned LI3: rrs (Reverse) LI4: JOG tcc = OPt: LI1: no, cannot be reassigned LI: PS LI3: PS4 LI4: PS8 -LCC Parameter only accessible with the remote display mounting option (see page 83): no no - YES Enables control of the drive controller using the STOP/RESET, RUN and FWD/REV buttons on the remote keypad display module. The speed reference is then given by parameter LFr in the SEt- menu. Only the freewheel, fast stop, and DC injection stop commands remain active on the terminal block. If the drive controller/remote display link is broken, the drive controller stops with an SLF fault. 68

28 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes I/O Menu I-0- (continued) Code -LI -LI3 -LI4 Factory Assignment setting Logic inputs. Refer to Logic Input Functions on page 45 for functionality. rrs no: not assigned rrs: reverse rotation ( operating directions) rp: ramp switching [1] JOG: jog operation [1] PS: preset speeds PS PS4: 4 preset speeds [1] PS4 PS8: 8 preset speeds [1] nst: freewheel stop. Function active when LIx = 0. dci: DC injection braking IdC, peak limited at 0.5 ItH after 5 seconds if the command is maintained. See page 60. FSt: fast stop. Function active when LIx = 0. FLO: forced local mode rst: fault reset rfc: auto/manual: If AIC = no, when LIX = 0, the speed reference is taken from AIC/AI. When LIX = 1, the speed reference is taken from AI1 (see the AIC function on page 70 for auto/manual operation if the PI function is active). When tcc = 3C, LI = Forward and cannot be reassigned. When a selected function is already active with a logic input, its assignment to that logic input is cancelled when it is assigned to a new logic input and confirmed by pressing ENT. The 4 or 8 preset speeds must be assigned in the following order: PS then PS4 then PS8. They must be cancelled in the reverse order (see Configurable Logic and Analog I/O Functions on page 45). 69

29 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 I/O Menu I-0- (continued) Code -AIC Assignment Factory setting Analog input AIC or AI no: not assigned. SAI: summing with AI1. SAI PII: PI regulator feedback. Use keypad parameter rpi for setpoint adjustment. [1][] PIA: PI regulator feedback. Use AI1 for setpoint adjustment. [1] SAI cannot be assigned if a logic input is assigned to rfc (auto/manual). PII and PIA cannot be assigned if a logic input is assigned to JOG or to PS. When a logic input, LIX, is assigned to RFC (auto/manual) and AIC is assigned to PII or PIA: If LIX = 0, the speed reference is the output of the internal PI function. If LIX = 1 and AIC is set to PII, the speed reference is taken from the rpi parameter (see rpi on page 59). [] If LIX = 1, and AIC is set to PIA, the speed reference is taken from AI1. [1] Assigning this function displays the corresponding settings in the SEt- menu for adjustment. [] RPI is not displayed when LCC = YES on the remote keypad display module. 70

30 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes I/O Menu I-0- (continued) Code -CrL -CrH Assignment Minimum value on input AIC, adjustable from 0 to 0 ma. Maximum value on input AIC, adjustable from 4 to 0 ma. These two parameters are used to configure the input current range. Frequency Factory setting HSP LSP 0 AI C(mA) CrL CrH 0 4 ma 0 ma -AO -AOt When the input used is AI, these parameters remain proportionally active: 4 ma V 0 ma 10 V For 0 4 ma, CrH must be less than CrL. For a 0 10 V input, configure CrL at 0 and CrH at 0. Analog output no: not assigned. OCr: motor current. 0 ma corresponds to twice the nominal motor thermal current ItH. rfr: motor frequency. 0 ma corresponds to the maximum frequency tfr. OLO: motor torque. 0 ma corresponds to twice the nominal motor torque. OPr: power supplied by the drive controller. 0 ma corresponds to twice the nominal motor power. Analog output 0: 0 0 ma configuration 4: 4 0 ma configuration rfr 0 71

31 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 I/O Menu I-0- (continued) Code Assignment Factory setting -r Relay R no: not assigned FtA: frequency threshold reached. The contact is closed when the motor frequency is greater than or equal to the threshold set by Ftd. [1] CtA: current threshold reached. The contact is closed when the motor current is greater than or equal to the threshold set by Ctd. [1] SrA SrA: speed reference reached. The contact is closed when the motor frequency is greater than or equal to the speed reference. tsa: thermal threshold reached. The contact is closed when the motor thermal state is greater than or equal to the threshold set by ttd. [1] -Add Address of the drive controller when it is controlled via the serial link. Adjustable from 1 to bdr Serial link transmission speed: 9.6 = 9600 bits/s or 19. = 1900 bits/s [] 19. Modification of this parameter does not take effect until drive controller power is cycled. [1] Assigning this function displays the corresponding settings in the SEt- menu for adjustment. [] The remote keypad display only functions when bdr is set to

32 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Programming Codes Display Menu SUP- The Display menu allows you to choose the parameter to be displayed during operation and to view the last fault, drive controller firmware version, and access code. To save the selected display: Press the ENT key once. The choice is temporary. It will be cleared at the next power up. Press the ENT key twice. The choice is permanent. Pressing ENT a second time exits the SUP- menu. The display parameters are accessible with the drive controller stopped or running. Code Parameter Unit -FrH Display the frequency reference Hz -rfr Display the output frequency applied to the motor Hz -SPd Display the speed calculated by the drive controller (rfr x SdS) -LCr Display the motor current A -OPr Display the power supplied to the motor, estimated by the drive controller. 100% corresponds to the nominal drive controller power. % -ULn Display the line voltage V -thr Display the motor thermal state. 100% corresponds to the nominal thermal state. % Above 118%, the drive controller triggers an OLF fault (motor overload) unless Ith is disabled. -thd Display the drive controller thermal state: 100% corresponds to the nominal thermal state. Above 118%, the drive controller triggers an OHF fault (drive overheated). % It can be reset below 100%. -LFt View the last fault which appeared. If there has been no fault, the display shows: nof. Refer to Fault Codes on page 80 for a list of faults. -CPU Drive controller firmware version 73

33 ALTIVAR 8 User s Manual VVDED39906USR05/03 Programming Codes 05/003 Display Menu SUP- (continued). Code -COd ---- Parameter For drive controllers with firmware version earlier than 1.1 IE1 (or version 7.7 IE15 for 600 V controllers), this parameter can only be seen and accessed using a remote display mounting option or test and commissioning software. See pages 83 and 84. Access code: 0 to Value 0 (factory setting) does not prevent access. All other values lock access to the SEt-, drc- and I-O- menus. To lock access to the drive controller, enter the code with the arrow keys ( ) then save it using (ENT). To unlock access to the menus, enter the code with the arrow keys ( ) and save it using (ENT): If the code is correct, the display flashes. Enter code 0 can to access the menus. If the code is incorrect, the drive controller returns to the initial display (rdy). Display of drive controller status: the operating state of the motor or a fault. - Init: Initializing - rdy: Drive controller ready - xx.x: Frequency reference (for example, 43.0) - dcb: DC injection braking - rtry: Automatic restart - nst: Freewheel stop - FSt: Fast stop 74

34 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Configuration Tables CONFIGURATION TABLES Use the following tables to record your drive controller information and settings. Drive controller ATV8H: Optional customer identification no.: Firmware version (CPU parameter in the SUP menu): Optional access code: Start/stop/potentiometer option no yes Menu SEt- (Settings) Code Factory setting Customer setting Code Factory setting Customer setting -rpi 0.0% % -rot For -ACC 3.0 s s -dec 3.0 s s -AC 5.0 s s -de 5.0 s s -LSP 0.0 Hz Hz -HSP Hz Hz -ItH A A -UFr 0% (15% for 575 V) % -SLP Hz Hz -FLG 33% % -IdC A A -tdc 0.5 s s -JPF 0 Hz Hz -JOG 10 Hz Hz -rpg 1 -rig 1 /s /s -FbS 1 -PIC no -SP 10 Hz Hz -SP3 15 Hz Hz -SP4 0 Hz Hz -SP5 5 Hz Hz -SP6 30 Hz Hz -SP7 35 Hz Hz -Ftd Hz Hz -Ctd A A -ttd 100% % -tls 0.0 s s The parameters in shaded boxes appear if the corresponding functions have been configured in the drc- or I-O- menus. 75

35 ALTIVAR 8 User s Manual VVDED39906USR05/03 Configuration Tables 05/003 Menu I-O- (Inputs/Outputs) Code Factory setting Customer setting Code Factory setting Customer setting -tcc C -LI rrs -LI3 PS -LI4 PS4 -AIC SAI -CrL 4 ma ma -CrH 0 ma ma -AO rfr -AOt 0 ma ma -r SrA -Add 1 -bdr 19. Menu drc- (Drive) Code Factory setting Customer setting Code Factory setting Customer setting -UnS V V -FrS Hz Hz -tun no -tfr Hz Hz -UFt n -bra YES -Frt 0 Hz Hz -SFr 4.0 khz khz -nrd YES -Atr no -OPL YES -IPL YES -StP no -FLr no -drn no -SdS 30 76

36 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Maintenance and Troubleshooting MAINTENANCE AND TROUBLESHOOTING Precautions Read the following safety statements before proceeding with any maintenance or troubleshooting procedures.! DANGER HAZARDOUS VOLTAGE Read and understand these procedures before servicing ATV8 drive controllers. Installation, adjustment, and maintenance of these drive controllers must be performed by qualified personnel. Failure to follow this instruction will result in death or serious injury. Routine Maintenance Fault Detection The procedures beginning on page 78 are intended for use by qualified electrical maintenance personnel and should not be viewed as sufficient instruction for those who are not otherwise qualified to operate, service, or maintain the equipment discussed. Perform the following steps at regular intervals: Check the condition and tightness of the connections. Make sure ventilation is effective and temperature around the drive controller remains at an acceptable level. Remove dust and debris from the drive controller, if necessary. If a fault is detected, the drive controller trips and the fault relay deenergizes unless Atr is active. See Atr on page 64 for a description of automatic restart. Table 17 on page 80 lists the codes for faults that can be automatically reset or reset by a logic input, the probable causes of the faults, and the associated corrective action. Table 18 on page 81 lists the codes for faults that require a cycling of power to the drive controller to reset the fault along with the probable causes of the faults and 77

37 ALTIVAR 8 User s Manual VVDED39906USR05/03 Maintenance and Troubleshooting 05/003 associated corrective action. When taking corrective action, verify that there is no voltage present on the DC bus (see Bus Voltage Measurement Procedure on page 9), then check the supply voltage and peripheral equipment as outlined below. Procedure 1: Checking the Supply Voltage To measure the input line voltage: 1. Remove all input line voltage.. Attach meter leads to L1 and L. Set the voltmeter to the 600 Vac scale. 3. Reapply power and check for the correct line voltage, according to the drive controller nameplate rating. 4. Remove power. If the controller is wired for three phase, repeat the procedure for L and L3, and L1 and L3. 5. When all phases have been measured, remove power. Remove leads and reinstall covers. Procedure : Checking the Peripheral Equipment Check the equipment for the following conditions according to the manufacturer s procedures. 1. A protective device such as fuses or a circuit breaker may have tripped.. A switching device such as a contactor may not be closing at the correct time. 3. Conductors may require repair or replacement. 4. Check for loose connection cables to the motor or to ground. Follow NEMA standard procedure WC-53. NOTE: Bus voltage can exceed 1000 Vdc. Use appropriately-rated measuring equipment. 78

38 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Fault Storage 5. Motor insulation may be worn. Follow NEMA standard procedure MG-1. Do not apply high voltage to U/T1, V/T, or W/T3 (see Figure 9 on page 36). Do not connect high potential dielectric test equipment or an insulation resistance tester to the drive controller since the test voltages used may damage the drive controller. Always disconnect the drive controller from the conductors or motor while performing such tests. CAUTION DIELECTRIC TESTS, When Connected Do not perform high potential dielectric tests on circuits while the circuits are connected to the drive controller. Any circuit requiring high potential dielectric tests must be disconnected from the drive controller prior to performing the test. Failure to follow this instruction can result in injury or equipment damage. FAULT STORAGE An existing fault is saved and displayed on the keypad display as long as power is maintained. When the drive controller trips, the fault relay deenergizes (see Table 10 on page 37). To reset the fault: Remove power from the drive controller. Identify and correct the cause of the fault. Restore power. This resets the fault if it has been corrected. In certain cases, if automatic restart is enabled, the drive controller automatically restarts after the cause of the fault has disappeared. Refer to the description of Atr on page

39 ALTIVAR 8 User s Manual VVDED39906USR05/03 Fault Codes 05/003 FAULT CODES Table 17: Faults Resettable by LI or Automatic Restart Fault Probable cause Corrective Action -OHF drive controller overload -OLF motor overload -OSF overvoltage during steady state operation or during acceleration -USF undervoltage -ObF overvoltage during deceleration -PHF input phase failure -OPF motor phase failure - SLF serial link failure - continuous motor current load too high or - ambient temperature too high - thermal trip due to prolonged motor overload - motor power rating too low for the application - line voltage too high - input voltage too low - transient voltage dip - damaged pre-charge resistor - braking too rapidly or overhauling load - input phase loss, blown fuse - input phase imbalance - transient phase fault - 3-phase controller used on a single phase line supply - loss of a phase at the drive controller output - drive oversized for motor - loss of connection between the drive controller and the remote keypad display or the MODBUS controller - Check the motor load, the drive controller ventilation, and the environment. Wait for the controller to cool before restarting. - Check the setting of the motor thermal protection (ItH). See page 59. Check the motor load. Wait for the motor to cool before restarting. - Check the line voltage. Compare with the drive controller nameplate ratings. - Reset the drive controller. - Check the line voltage. - Check the setting of parameter UnS (see pages 6 and 76). - Replace the drive controller. - Increase the deceleration time. - Install a braking resistor if necessary. - Activate the bra function if it is compatible with the application. See page Verify that the input power is correct. - Check the line fuses. - Verify input power connections. - Supply 3-phase power if needed. - Check the connections from the drive controller to the motor. - Disable OPL (see page 65) and provide external overload protection. - Restore the proper connection to the remote keypad display or the MODBUS controller. 80

40 VVDED39906USR05/03 ALTIVAR 8 User s Manual 05/003 Fault Codes Table 18: Faults Requiring Power Cycle Reset Fault Probable cause Corrective Action -OCF overcurrent -SCF motor short-circuit -InF internal fault -tnf auto-tuning fault -EEF EEPROM fault - acceleration too rapid - drive controller and/or motor undersized for load - mechanical blockage - short-circuit or grounding at the drive controller output - internal fault - internal connection fault - special motor or motor whose power is not suitable for the n or nld setting of the UFb parameter - internal drive controller memory error - Adjust drive controller programming. -Ensure that the size of the motor and drive controller is sufficient for the load. - Clear mechanical blockage. - Check the cables connecting the drive controller to the motor, and check the insulation of the motor. - Remove sources of electromagnetic interference. - Verify that the start/stop potentiometer kit (part number VW3A8100) has not been connected or disconnected with the drive controller powered up. - Replace the drive controller. - Use the L or P setting of UFt. - Remove power from drive controller and reset. - Replace the drive controller. NOTE: You must correct the cause of the fault before restoring powering. Drive Controller Does Not Start, No Fault Displayed The assignment of the Fast stop or Freewheel stop functions prevents the controller from starting if the corresponding logic inputs are not powered up. The ATV8 controller then displays nst in freewheel stop mode and FSt in fast stop mode. This is normal since these functions are active at zero so that the controller will be stopped safely if there is a wire break. On power-up or a manual fault reset or after a stop command, the motor can only be powered after the forward, reverse, and DC injection stop commands have been reset. If they have not been reset, the drive controller displays rdy but does not start. If the automatic restart function is configured (parameter Atr in the drc menu) and the drive controller is in -wire control, these commands are taken into account without a reset being necessary. 81

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