Telemecanique Altivar 56 manual - Northern Industrial

Bulletin No. 50006-519-01BDecember 1996Chapter 4 — DiagnosticsFault MessagesSEQUENCE T. OUT(Sequence Time out)PROCESS TIME OUTTRANS. SHORT C. orGF(Transistor ShortCircuit)1. Sequence input not receivedafter Run command withinprogrammed time (Bypassfunction).1. Process input not receivedafter Run command withinprogrammed time (Bypassfunction).1. Check connection between usersuppliedcontact and logic input,ensuring it is connected to programmedinput.2. Verify operation of contact.3. Verify operation of external controlsequencing.1. Check connection between usersuppliedcontact and logic input,ensuring it is connected to programmedinput.2. Verify operation of contact.3. Verify operation of process.1. Transistor is in short circuit. 1. Contact local service representative.OPEN TRANSISTOR 1. Transistor has failed open. 1. Contact local service representative.OUT. PHASE LOSSFigure 27: Fault Messages (Continued)Fault Message Probable Cause Troubleshooting Procedure1. Motor power rating too smallfor controller.2. Output phasesdisconnected.[1] Fault cannot be disabled; always causes a freewheel stop.[2] Occurs upon power up only.1. Motor power rating must be > 45% ofcontroller power rating.2. Check output power conductors andconnectors for lack of continuity.3. Check output contactor sequencing.The additional faults listed in Table 19 may be displayed if an option module isinstalled and a fault occurs.Table 19: Fault Messages from Option ModulesFault Messages Probable Cause Troubleshooting ProcedureWithout tachometer:OVERSPEED1. Output frequency is 20% aboveMaximum Frequency parametersetting.With tachometer:1. Incorrect adjustment oftachometer feedback.1. Check load base speed and powerrating, compare with operatingspeed and drive controller/motorpower rating.1. Check feedback.2. Machine overload. 2. Check load base speed and powerrating, compare with operatingspeed and drive controller/motorpower rating.3. No tachometer signal. 3. Check tachometer connection.4. Tachometer polarity incorrect. 4. Check tachometer polarity.CUSTOM. FAULT 1. User defined. 1. Dependent on user setting.FEEDBACK LOSS 1. No tachometer feedback signal. 1. Check tachometer wiring.Other faults may be displayed depending on how the drive controller isprogrammed. For more information on faults and self-diagnostics, refer toChapter 5.© 1996 Square D All Rights Reserved47ηττπ://νιχοντρολσ.χοm