Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Basic · 10-20 minutes

Alarm 61505

Siemens 840D 61505 - Channel block: retraction path < 1mm

The alarm can be triggered by the following grinding cycle: CYCLE420 Remedy: Increase retraction path

Siemens SINUMERIKServo/AxisBasic10-20 minutes

61505

Siemens 840D 61505 - Channel block: retraction path < 1mm

Channel block: retraction path < 1mm

The alarm can be triggered by the following grinding cycle: CYCLE420 Remedy: Increase retraction path

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • CYCLE420 grinding cycle configured with retraction path less than 1mm minimum threshold
  • Incorrect retraction path parameter in grinding cycle definition
  • Tool compensation or offset causing net retraction movement below 1mm
  • Part program error in cycle call syntax or retraction distance specification

Troubleshooting Steps

  1. 1Review the CYCLE420 call in the part program at the specified block number and verify the retraction path parameter value
  2. 2Increase the retraction path parameter to minimum 1mm or greater as required by the alarm
  3. 3Check tool offset table and work offset values to confirm they are not reducing the intended retraction movement below threshold
  4. 4Verify part program syntax matches Siemens documentation for CYCLE420 grinding cycle parameter definitions
  5. 5Clear alarm, reload part program, and perform dry run to confirm retraction path now exceeds 1mm threshold

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