Alarm Code 31 without an M Command on Fanuc Alpha and Alpha i Spindle Modules

ALARM 31 ON A NEW INSTALL:
On power up (before you give a speed command), this alarm is most often because the software revision or #suffix is not correct.

To find out what software is installed in the spindle module, all you need to do is apply 24v DC. The first numbers that are displayed on the spindle module will tell the software series. Example: 10 = #H510, 11 = #H511, 12 = #H512