What causes Siemens SINUMERIK alarm 61529?

G20 (inch) command programmed in a metric system machine configuration ($MN_SCALING_SYSTEM_IS_METRIC = 1). Grinding cycle (CYCLE410-CYCLE415 or CYCLE420) contains G20 inch notation while machine is set to metric. Mismatch between machine parameter $MN_SCALING_SYSTEM_IS_METRIC and active G-code group 13 setting. Program was created for inch machine but loaded on metric-configured 840D/828D. Incorrect machine database or parameter backup applied during commissioning.

How do I fix Siemens SINUMERIK alarm 61529?

1. Verify current machine metric/inch configuration by checking machine parameter $MN_SCALING_SYSTEM_IS_METRIC (1=metric, 0=inch) in Diagnostics > Machine Parameters 2. Review the part program at block %2 in channel %1 and identify all G20/G21 commands, particularly within the grinding cycle calls 3. Confirm programmed dimensional system matches machine configuration: convert G20 commands to G21 if machine is metric, or verify machine should be inch-based 4. Edit the part program to remove conflicting G20 command or reconfigure $MN_SCALING_SYSTEM_IS_METRIC parameter to match program intent 5. Clear alarm, re-load corrected program, and test with DRY RUN to verify dimensional notation consistency throughout execution

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 61529

Siemens 840D 61529 - Channel block: Dimensional notation INCH programmed

The alarm can be triggered by the following grinding cycles: CYCLE410, CYCLE411, CYCLE412, CYCLE413, CYCLE414, CYCLE415, CYCLE420 Remedy: Basic system MD $MN_SCALING_SYSTEM_IS_METRIC does not correspond to programmed G command (G group 13). © Siemens AG, 2006. All rights reserved SINUMERIK, SIMODRIV

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

61529

Siemens 840D 61529 - Channel block: Dimensional notation INCH programmed

Channel block: Dimensional notation INCH programmed

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

G20 (inch) command programmed in a metric system machine configuration ($MN_SCALING_SYSTEM_IS_METRIC = 1)
Grinding cycle (CYCLE410-CYCLE415 or CYCLE420) contains G20 inch notation while machine is set to metric
Mismatch between machine parameter $MN_SCALING_SYSTEM_IS_METRIC and active G-code group 13 setting
Program was created for inch machine but loaded on metric-configured 840D/828D
Incorrect machine database or parameter backup applied during commissioning

Troubleshooting Steps

1Verify current machine metric/inch configuration by checking machine parameter $MN_SCALING_SYSTEM_IS_METRIC (1=metric, 0=inch) in Diagnostics > Machine Parameters
2Review the part program at block %2 in channel %1 and identify all G20/G21 commands, particularly within the grinding cycle calls
3Confirm programmed dimensional system matches machine configuration: convert G20 commands to G21 if machine is metric, or verify machine should be inch-based
4Edit the part program to remove conflicting G20 command or reconfigure $MN_SCALING_SYSTEM_IS_METRIC parameter to match program intent
5Clear alarm, re-load corrected program, and test with DRY RUN to verify dimensional notation consistency throughout execution

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