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Siemens SINUMERIK Controller
Parameter · Intermediate · 30-120 minutes
Siemens 840D 61368 - Channel block: Straights through parameter _SETV[0.3] or
Alarm 61368 is triggered by CYCLE961 when identical or insufficiently differentiated position values are specified in the _SETV[0...3] parameter array, preventing the interpolation of distinct straight-line segments. The NCK cannot generate valid linear paths when setpoint positions are duplicated or fall below the machine's position resolution threshold.
Siemens 840D 61368 - Channel block: Straights through parameter _SETV[0.3] or
Channel block: Straights through parameter _SETV[0.3] or
Siemens SINUMERIK alarm 61368: Channel block: Straights through parameter _SETV[0.3] or. This alarm indicates a fault or error condition on the SINUMERIK 840D control. Refer to the Siemens SINUMERIK alarm documentation for the complete description and remedy.
Root Cause Summary
Alarm 61368 is triggered by CYCLE961 when identical or insufficiently differentiated position values are specified in the _SETV[0...3] parameter array, preventing the interpolation of distinct straight-line segments. The NCK cannot generate valid linear paths when setpoint positions are duplicated or fall below the machine's position resolution threshold.
Safety
Causes and Fixes
Access the part program and locate the CYCLE961 call. Review all _SETV[0...3] parameter assignments in the current block and preceding blocks.
Use the Program Trace (Ctrl+Shift+T) in SINUMERIK Operate to display real-time parameter values during cycle execution.
Verify that each _SETV array element contains a unique coordinate value. Print or log the values: _SETV[0], _SETV[1], _SETV[2], _SETV[3] to confirm no duplicates exist.
Check for values that appear identical but differ in decimal precision; use the Diagnostics menu (Siemens 840D) to inspect actual parameter values with full precision.
Modify the part program to assign distinct position values to each array element, ensuring the geometric progression follows the intended tool path for the straight segments.
Reload the part program and execute CYCLE961 again. Monitor the alarm list (Alarms menu) to confirm resolution.
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