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Siemens SINUMERIK Controller
Servo/Axis · Intermediate · 30-120 minutes
Siemens 26019 - Axis encoder measurement not possible with this controller module
Alarm 26019 is triggered when a MEASURE command is executed in the part program (G65 or similar measuring cycle) but the control module assigned to the specified axis does not support the measuring function. The MD $MN_DRIVE_DIAGNOSIS[8] diagnostic parameter detects incompatible drive hardware or firmware that lacks measurement capability.
26019
Siemens 26019 - Axis encoder measurement not possible with this controller module
Axis encoder measurement not possible with this controller module
If the MD MD13100 $MN_DRIVE_DIAGNOSIS[8] contains a value not equal to zero, then the control has found at least one control module which does not support measuring. Measuring was programmed from the part program for the associated axis Control reaction: Local alarm reaction. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm.
Root Cause Summary
Alarm 26019 is triggered when a MEASURE command is executed in the part program (G65 or similar measuring cycle) but the control module assigned to the specified axis does not support the measuring function. The MD $MN_DRIVE_DIAGNOSIS[8] diagnostic parameter detects incompatible drive hardware or firmware that lacks measurement capability.
Safety
- Drive/power/encoder circuit: hazardous voltages may remain in the DC link after power-off. Lock out / tag out, wait for discharge per the drive documentation, and use qualified personnel only.
Causes and Fixes
- 1
Check the drive type assignment in NCK menu: Diagnosis > Drive > Axis Configuration. Verify that the axis uses a measurement-capable drive module listed in the system documentation (e.g., SIMODRIVE 611 with measuring input, not basic stepper modules).
Do not attempt to enable measuring on unsupported drive hardware.
- 2
Inspect MD $MN_DRIVE_DIAGNOSIS[8] value via HMI Diagnostics menu or Service menu. A non-zero value indicates which drive module lacks measurement support. Document the axis number and drive module identification.
- 3
Verify encoder cable connection to the drive's measurement input terminals. Confirm encoder type matches drive expectations (absolute/incremental). Check MD $MN_ENCODER_TYPE[axis] parameter aligns with physical encoder hardware.
Loose or reversed encoder connectors will prevent measurement capability detection.
- 4
If hardware is correct, update drive firmware via SIEMENS Service Tool. Measuring functionality may require minimum firmware revision level on the servo module.
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