What causes Siemens SINUMERIK alarm 20147?

MEASA (measurement command) programmed within a synchronous action block, which is not permitted in embargo versions. Unsupported command attempted within the synchronous action block that conflicts with current system configuration. Incompatible measurement level settings preventing execution of synchronized measurement operations. Reset command issued to synchronous action block in an invalid machine state or sequence. Synchronous action block contains commands that exceed system capabilities for the current NC program context.

How do I fix Siemens SINUMERIK alarm 20147?

1. Review the NC program around block %2 in channel %1 and identify all commands within the synchronous action block - remove any MEASA or measurement commands if present 2. Verify the machine's measurement level configuration and compare against program requirements - consult machine documentation for embargo version restrictions 3. Check that all commands within the synchronous action are supported in the current system version - compare against Siemens 840D/828D command compatibility lists 4. Isolate the synchronous action block and test execution without measurement or reset operations to confirm basic block validity 5. If measurement is required, restructure the program to perform measurements outside of synchronous action blocks or upgrade to a non-embargo system version if available

Siemens SINUMERIK codes

axismd.ai

Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-60 minutes

Alarm 20147

Siemens 840D 20147 - Channel block motion synchronous action: command not

One of the commands for the synchronous action block cannot be executed, e.g. it is not possible to perform a Reset to the synchronous action. Measurement level 2 - Embargo version does not allow measurement from a synchronized action - MEASA was programmed in a synchronized action - Measurement is

Siemens SINUMERIKServo/AxisIntermediate30-60 minutes

20147

Siemens 840D 20147 - Channel block motion synchronous action: command not

Channel block motion synchronous action: command not

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

MEASA (measurement command) programmed within a synchronous action block, which is not permitted in embargo versions
Unsupported command attempted within the synchronous action block that conflicts with current system configuration
Incompatible measurement level settings preventing execution of synchronized measurement operations
Reset command issued to synchronous action block in an invalid machine state or sequence
Synchronous action block contains commands that exceed system capabilities for the current NC program context

Troubleshooting Steps

1Review the NC program around block %2 in channel %1 and identify all commands within the synchronous action block - remove any MEASA or measurement commands if present
2Verify the machine's measurement level configuration and compare against program requirements - consult machine documentation for embargo version restrictions
3Check that all commands within the synchronous action are supported in the current system version - compare against Siemens 840D/828D command compatibility lists
4Isolate the synchronous action block and test execution without measurement or reset operations to confirm basic block validity
5If measurement is required, restructure the program to perform measurements outside of synchronous action blocks or upgrade to a non-embargo system version if available

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