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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 101614 - Response too long
Alarm 101614 occurs when the CNC system receives a response from an external device, network component, or PLC that exceeds the expected buffer size or timeout threshold. This is typically caused by communication protocol mismatches, excessive data transmission from synchronized actions, or network configuration issues between the NCU and connected devices.
101614
Siemens 840D 101614 - Response too long
Response too long
Siemens SINUMERIK operator message 101614: Response too long. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
Alarm 101614 occurs when the CNC system receives a response from an external device, network component, or PLC that exceeds the expected buffer size or timeout threshold. This is typically caused by communication protocol mismatches, excessive data transmission from synchronized actions, or network configuration issues between the NCU and connected devices.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check the NCU alarm log for the exact time of occurrence and identify which PLC address or device was communicating (check system variables $A_DLB or communication diagnostics).
- 2
Review the PLC program for any GET/PUT operations or synchronous actions that may be transmitting large data blocks (>4KB) to the NCU during the alarm occurrence.
- 3
In SIMATIC STEP7/TIA Portal, verify the data block sizes being transferred and split large transfers into smaller sequential transactions (maximum 2-4KB per cycle recommended).
Ensure machine is in a safe state before modifying PLC communication cycles
- 4
Adjust NCU communication cycle time in machine data MD10630 $MN_SYSCLOCK_CYCLE_TIME if PLC cycle is slower than NCU cycle, or optimize PLC scan time to prevent data accumulation.
Machine data changes require NCU reboot and may affect system timing
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Always verify with your machine manual or a certified technician before performing service procedures.