A horizontal machining center with Fanuc IIM CNC controller, the JOG and Reference-return are fine, program execution is correct under MDI mode, but it does not work under the MEM mode.

As the JOG, reference-return and MDI are fine, which means the CNC controller and the drivers are working normal, and the CNC parameters should be no problem.

Normally if the machine works under MDI but not MEM, this probably relate to the operation mode selection.

Check the CNC status diagnose and found the MEM mode was not selected, the reason is the switch cable was disconnected, fix it then the machine resumed