Code

Name

Causes

Possible Solutions

CALL

Serial Comm Transmission Error

The communications cable wiring is incorrect.

Correct wiring errors.

There is a short-circuit in the communications cable or the communications cable is not connected.

  • Repair the short-circuited or disconnected portion of the cable.

  • Replace the defective communications cable.

A programming error occurred on the controller side.

Examine communications at start-up and correct programming errors.

The communications circuitry is damaged.

  • Do a self-diagnostics check.

  • If the problem continues, replace the control board or the drive. For information about replacing the control board, contact Yaskawa or your nearest sales representative.

The termination resistor setting for MEMOBUS/Modbus communications is incorrect.

On the last drive in a MEMOBUS/Modbus network, set DIP switch S2 to the ON position to enable the termination resistor.
Note:

  • The drive detects this error if it does not correctly receive control data from the controller when energizing the drive.

  • If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.