Code 75005: [Channel %1: ] CLC: block %2 General programming error
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] CLC: block %2 General programming error 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
Parameters: %1 = Channel number %2 = Block number Definitions: The activation / deactivation command for the clearan ce control "CLC(..)" accepts only the values 3, 2, 1, 0 and -1 as call parameters. This alarm si gnals that parameters are incorrect or missing. The activation command CLC(2) with moni toring of the sensor collision si gnal is accepted only if a valid digital input is configured for the monitori ng signal in MD $MC_CLC_SENSOR_TOUCHED_INPUT. Reaction: Interpreter stop Alarm display. Remedy: Modify part program. Configure the digital input fo r the collision evaluation in MD if necessary. Program Continuation: Clear alarm with the RESET key. Restart part program
Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINUMERIK 840D CNC Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 75005 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.
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