Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-40 minutes

Alarm 4110

Siemens 840D 4110 - IPO cycle factor changed to

The IPO cycle divisor was set to a value which was not an integral multiple of the position control cycle divisor. The divisor (MD 10070 IPO_SYSCLOCK_TIME_RATIO) was increased. IPO_SYSCLOCK_TIME_RATIO has been modified on systems with PROFIBUS DP because of the modified DP cycle in SDB-Type-2000 (MD

Siemens SINUMERIKServo/AxisIntermediate20-40 minutes

4110

Siemens 840D 4110 - IPO cycle factor changed to

IPO cycle factor changed to

The IPO cycle divisor was set to a value which was not an integral multiple of the position control cycle divisor. The divisor (MD 10070 IPO_SYSCLOCK_TIME_RATIO) was increased. IPO_SYSCLOCK_TIME_RATIO has been modified on systems with PROFIBUS DP because of the modified DP cycle in SDB-Type-2000 (MD

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • MD 10070 (IPO_SYSCLOCK_TIME_RATIO) was modified to a non-integral multiple of the position control cycle divisor
  • PROFIBUS DP cycle time was changed in SDB-Type-2000, requiring automatic adjustment of IPO cycle factor
  • Manual parameter adjustment made without considering the relationship between IPO and position control cycles
  • System configuration changes applied without proper synchronization of cycle ratios

Troubleshooting Steps

  1. 1Verify current MD 10070 value and confirm it is an integral multiple of the position control cycle divisor (MD 10010)
  2. 2Check PROFIBUS DP configuration in SDB-Type-2000 and review any recent changes to DP cycle timing
  3. 3Calculate correct IPO_SYSCLOCK_TIME_RATIO by dividing position control cycle by desired IPO cycle, ensuring whole number result
  4. 4If DP cycle was modified, allow system to automatically recalculate and adjust MD 10070, or manually set to compliant value
  5. 5Perform system reset and verify alarm clears after parameter adjustment

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