Code 700027: PLC-MD wrong (option mpg)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical PLC-MD wrong (option mpg) 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
Portable manual pulse generator was plugged in, but the portable manual pulse generator option is not yet set. Portable manual pulse generator was plugged in, but the option for the installed manual pulse generator is set. Both the „Portable“ and „Built-in manual pulse generator“ options have been simultaneously set. Manual pulse generator function is not possible. 1. Correct the selection of the option to correspond with the manual pulse generator used. 2. As soon as the malfunction has been remedied, press [Control OFF] Control is switched off. 3. Press [Control ON] Message is cleared.
Source: CHIRON Error Message Overview, all series (Siemens control, V2.0.6, 2012)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Chiron Siemens-Control CNC Alarms
Chiron controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 700027 on the Siemens-Control CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Chiron's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 545 Chiron Siemens-Control CNC codes.
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