Yaskawa P7 Drive User Manual - Manual (Page 146)

Diagnostic & Troubleshooting 6 - 2
Fault Detection
When the Drive detects a fault, the fault information is displayed on the digital operator, the fault contact closes, and the motor
coasts to stop. (However, a fault with selectable stopping method will operate according to the stopping method selected.)
• If a fault occurs, take appropriate action according to the table by investigating the cause.
• To restart, reset the fault with any of the following procedures:
• Turn ON the fault reset signal.
• Set “14: Fault Reset” to a multi-function digital input (H1-01 to H1-05).
• Press the RESET key of the digital operator.
• Shut off the Drive input power once, and then turn on again.
WARNING
The Run Command (Start Command) needs to be removed prior to resetting a fault. Resetting a fault by
removing and reapplying power to the Drive while the Run Command is applied, may cause the Drive to start
unexpectedly. Therefore, make sure all personnel are clear from the Drive, motor, and machine prior to
resetting the Drive.
Table 6.1 Fault Displays and Processing
Digital
Operator Display
Description Cause Corrective Action
BUS
Option Com Err
Option Communication Error
After initial communication was
established, the connection was lost.
Connection is broken, master
has stopped communicating Check all connections, verify all
user-side software configurations.
CE
Memobus Com Err
Modbus Communication Error
Control data was not received correctly for
two seconds
Connection is broken, master
has stopped communicating Check all connections, verify all
user-side software configurations.
CPF00
COM-ERR(OP&INV)
Operator Communication Fault 1
Transmission between the Drive and the
digital operator cannot be established
within 5 seconds after supplying power Digital operator cable not
securely connected, digital
operator defective, control
board defective
Remove the digital operator once
and then reinstall it
External RAM of CPU is defective Control circuit damage
Cycle power off and on to the
Drive
Replace the Drive
CPF01
COM-ERR(OP&INV)
Operator Communication Fault 2
After communication started with the
digital operator, a communication fault
occurred for 2 seconds or more
Digital operator cable not
securely connected, digital
operator defective, control
board defective
Remove the digital operator once
and then reinstall it
Cycle power off and on to the
Drive
Replace the Drive
CPF02
BB Circuit Err
Baseblock Circuit Fault
Baseblock circuit fault at power-up Gate array hardware failure
during power-up
Perform a factory initialization
Cycle power off and on to the
Drive
Replace the control board
CPF03
EEPROM Error
EEPROM Fault
EEPROM fault, check sum not valid
Noise or spike on the control
circuit input terminals
Perform a factory initialization
Cycle power off and on to the
Drive
Replace the control board