Cause : MECHATROLINK Watchdog Timer Error  comes when the drive detected a watchdog circuit exception while it received data from the controller. Examine the MECHATROLINK cable connection. If this error occurs frequently, examine the wiring and decrease the effects of electrical interference as specified by these manuals:

• MECHATROLINK-II Installation Guide (MECHATROLINK Members Association, manual number MMATDEP011)
• MECHATROLINK-III Installation Manual (MECHATROLINK Members Association, publication number MMATDEP018)