Cause : When the length of communication data is too long.

Warning” occurs when Pr.09-02 = 0 and the motor drive keeps running. The drive
resets automatically when receiving the correct communication data value.

Check if the communication command is correct.

Verify the wiring and grounding of the communication circuit. It is recommended
to separate the communication circuit from the main circuit, or wire in 90 degree
for effective anti-interference performance.

Check if the setting for Pr.09-01 and Pr.09-04 are the same as the setting for the
upper unit.

Check the cable and replace it if necessary.