Originally Posted by
girishdk
Hi,
I believe it is L or R parameter problem. Normally in the backup from menu (Par, Tooldata, Toollife,etc) the L0-L255 and R1900-R2799 are not backed up. If you make SRAM clear(by Rotary Sw = 7), these values become zero, but cannot be regained with above backup.
Only reloading the SRAM back up (from mainte.exe) will recover them, if it was backed up when machine was ok. One should also be careful when re-loading the SRAM backup because if this backup was of a different NC version as compared to present, sometimes the data go in wrong location & create problem, as sometimes the Memory Map changes from Version to Version.
If the details of L & R para related to chucking type are not available, the ideal solution would be to note the values of L0-L255 and R1900-R2799, from a working machine, then compare with this machine. Change one which is different here, then check the alarm & restore back if no change & try next para whose value is different.
Please note that, it is is required to write these values from "I/O Monitor Write" menu in the Diagnosis.
The parameters are many in number, but those having a non-zero value will be limited, depending on the PLC. This exercise should not take more than 4-5 hours.
Regards,
Girish