Code S53-118: Safety Function Warnings
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Safety Function Warnings alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Parameter setting illegal fo r number of device points (at PLC system startup) The parameter setting for the number of device points is illegal (due to the following reasons). The total number of points in one project 29K or more was set. The illegal value (-1 point or less, or 61441 points or more) for the number of device points was detected. It was detected that the nu mber of device points wa s not a multiple of 16. The number outside the usable number of device points in whole projects was detected. Remedy (1) The parameter setting for the number of device points is illegal. Set the parameter of the number of device points again and reboot the system. (2) If (1) does not solve t he problem, there is a possibility that the NC system is broken. Contact Mitsubishi. Illegal PLC 0x700*.yy -
Source: Mitsubishi M800/M80/E80 Series Alarm/Parameter Manual (IB-1501279)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mitsubishi M800/M80 CNC Alarms
Mitsubishi controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code S53-118 on the M800/M80 CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mitsubishi's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 722 Mitsubishi M800/M80 CNC codes.
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