[Cause]
It may be due to the following reasons:
1. An invalid electrode grinding condition number is specified in the electrode grinding instruction.
2. In the dual welding gun system, the electrode grinding condition number is valid on both welding guns.
[Countermeasures]
Take the following countermeasures:
1. Confirm whether the electrode grinding conditions exceed $SGTDCFG.$NUM_SCHED.
2. If it is a dual welding gun system, please specify 0 in the electrode grinding condition number of the single-sided welding gun.