What causes Siemens SINUMERIK alarm 61406?

Incorrect or missing _DLNUM parameter value in the active measuring cycle. DL (offset) number referenced in measuring cycle does not exist in machine offset table. Additive offset or setup offset count mismatch with configured _DLNUM value. Corrupted or improperly loaded measuring cycle program block. Parameter _DLNUM pointing to invalid memory location or offset range.

How do I fix Siemens SINUMERIK alarm 61406?

1. Verify the _DLNUM parameter value in the current measuring cycle matches an existing offset number in the machine's DL offset table 2. Check that additive offset and setup offset counts are correctly configured and match the _DLNUM reference 3. Review the measuring cycle program syntax at the specified block number to ensure _DLNUM is properly declared and within valid range 4. Clear the measuring cycle cache and reload the program from source; verify parameter inheritance and initialization 5. If issue persists, perform a machine parameter backup, then reset _DLNUM to default value and reconfigure offset references

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-45 minutes

Alarm 61406

Siemens 840D 61406 - Channel block: check DL number in _DLNUM

Alarm can be triggered by following measuring cycles: all measuring cycles. Remedy: Check the number of additive offset and setup offset. Check parameter _DLNUM.

Siemens SINUMERIKServo/AxisIntermediate30-45 minutes

61406

Siemens 840D 61406 - Channel block: check DL number in _DLNUM

Channel block: check DL number in _DLNUM

Alarm can be triggered by following measuring cycles: all measuring cycles. Remedy: Check the number of additive offset and setup offset. Check parameter _DLNUM.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

Incorrect or missing _DLNUM parameter value in the active measuring cycle
DL (offset) number referenced in measuring cycle does not exist in machine offset table
Additive offset or setup offset count mismatch with configured _DLNUM value
Corrupted or improperly loaded measuring cycle program block
Parameter _DLNUM pointing to invalid memory location or offset range

Troubleshooting Steps

1Verify the _DLNUM parameter value in the current measuring cycle matches an existing offset number in the machine's DL offset table
2Check that additive offset and setup offset counts are correctly configured and match the _DLNUM reference
3Review the measuring cycle program syntax at the specified block number to ensure _DLNUM is properly declared and within valid range
4Clear the measuring cycle cache and reload the program from source; verify parameter inheritance and initialization
5If issue persists, perform a machine parameter backup, then reset _DLNUM to default value and reconfigure offset references

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