What causes Siemens SINUMERIK alarm 12571?

Subprogram call placed in a block with motion synchronous action (WHENEVER clause) when it should be in a normal block. Incorrect use of predefined subprogram syntax within a synchronized motion context. Programming error where motion synchronous logic is applied to a block type that does not support subprogram execution. Mixing of synchronous motion commands with subprogram invocations in the same block.

How do I fix Siemens SINUMERIK alarm 12571?

1. Locate the referenced block %2 in the NC program for channel %1 and identify the predefined subprogram call %3 2. Verify the block structure: confirm whether it contains WHENEVER, SYNC, or other motion synchronous action syntax that should not be present with the subprogram call 3. Separate the subprogram call into its own independent block without motion synchronous action modifiers 4. Review the subprogram definition to ensure it is not dependent on synchronous motion context and is structured as a callable routine 5. Recompile and test the NC program after correcting the block syntax

Siemens SINUMERIK codes

axismd.ai

Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-40 minutes

Alarm 12571

Siemens 840D 12571 - Channel block not permissible for motion synchronous action

The predefined subprogram specified here is not allowed in a block with motion synchronous action. It may only be contained in a "normal" block.

Siemens SINUMERIKServo/AxisIntermediate20-40 minutes

12571

Siemens 840D 12571 - Channel block not permissible for motion synchronous action

Channel block not permissible for motion synchronous action

The predefined subprogram specified here is not allowed in a block with motion synchronous action. It may only be contained in a "normal" block.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

Subprogram call placed in a block with motion synchronous action (WHENEVER clause) when it should be in a normal block
Incorrect use of predefined subprogram syntax within a synchronized motion context
Programming error where motion synchronous logic is applied to a block type that does not support subprogram execution
Mixing of synchronous motion commands with subprogram invocations in the same block

Troubleshooting Steps

1Locate the referenced block %2 in the NC program for channel %1 and identify the predefined subprogram call %3
2Verify the block structure: confirm whether it contains WHENEVER, SYNC, or other motion synchronous action syntax that should not be present with the subprogram call
3Separate the subprogram call into its own independent block without motion synchronous action modifiers
4Review the subprogram definition to ensure it is not dependent on synchronous motion context and is structured as a callable routine
5Recompile and test the NC program after correcting the block syntax

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

Always verify with your machine manual or a certified technician before performing service procedures.