YASKAWA GA700 Technical Manual page 371

Code Name
PASS Modbus Communication
Test
Code Name
PF Input Phase Loss
Note:
• The drive detects this error if the DC bus voltage changes irregularly without regeneration.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• Use L8-05 [Input Phase Loss Protection Sel] to enable and disable PF detection.
Code Name
PGo Encoder (PG) Feedback
Loss
Note:
• The drive detects this error if it does not receive the speed detection pulse signal from the encoder in the detection time set in F1-14
[Encoder Open-Circuit Detect Time].
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in F1-02 [PG Open Circuit Detection
Select].
Code Name
PGoH Encoder (PG) Hardware
Fault
Note:
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in F1-02 [PG Open Circuit Detection
Select].
Code Name
rUn Motor Switch during Run
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name
SE Modbus Test Mode Error
Note:
If detected, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Causes
The MEMOBUS/Modbus
communications test is complete.
Causes
There is a phase loss in the drive input
power.
Loose wiring in the input power
terminals.
The drive input power voltage is
changing too much.
Unsatisfactory balance between voltage
phases.
The main circuit capacitors have
become unserviceable.
Causes
The encoder cable is disconnected or
wired incorrectly.
The encoder is not receiving power.
The holding brake is stopping the motor. Release the holding brake.
Causes
The encoder cable is disconnected.
Causes
The drive received a Motor 2 Selection
[H1-xx = 16] during run.
Causes
MEMOBUS/Modbus communications
self-diagnostics [H1-xx = 67] was done
while the drive was running.
6.5 Minor Faults/Alarms
Possible Solutions
The PASS display will turn off after
communications test mode is cleared.
Possible Solutions
Correct errors with the wiring for main circuit
drive input power.
Tighten the terminal screws to the correct
tightening torque.
• Examine the input power for problems.
• Make the drive input power stable.
• Examine the input power for problems.
• Make the drive input power stable.
• If the input power supply is good, examine the
magnetic contactor on the main circuit side for
problems.
• Examine the capacitor maintenance time in
monitor U4-05 [CapacitorMaintenance].
• If U4-05 is more than 90%, replace the
capacitor. Contact Yaskawa or your nearest sales
representative for more information.
• Examine the input power for problems.
• Re-energize the drive.
• If the alarm stays, replace the circuit board or the
drive. Contact Yaskawa or your nearest sales
representative for more information.
Possible Solutions
Examine for wiring errors or disconnected wires in
the encoder cable, and repair problems.
Examine the encoder power supply.
Possible Solutions
Correct any disconnected wires in the encoder
cable.
Possible Solutions
Make sure that the drive receives the Motor 2
Selection while the drive is stopped.
Possible Solutions
Stop the drive and do MEMOBUS/Modbus
communications self-diagnostics.
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