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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 101649 - Desired BICO interconnection impossible, since BICO output does not
Alarm 101649 indicates a BICO (Binector/Connector) parameter interconnection failure in the Siemens 840D system. This occurs when attempting to connect a BICO input to an output that either does not exist, is of an incompatible data type, or has been removed/modified in the drive or control configuration.
101649
Siemens 840D 101649 - Desired BICO interconnection impossible, since BICO output does not
Desired BICO interconnection impossible, since BICO output does not
Siemens SINUMERIK operator message 101649: Desired BICO interconnection impossible, since BICO output does not. 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 101649 indicates a BICO (Binector/Connector) parameter interconnection failure in the Siemens 840D system. This occurs when attempting to connect a BICO input to an output that either does not exist, is of an incompatible data type, or has been removed/modified in the drive or control configuration.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check the alarm detail buffer to identify the specific BICO parameter number causing the interconnection failure. Note both the source and destination parameters.
- 2
Verify the BICO output parameter exists by accessing the drive/control commissioning menu and searching for the exact parameter number. Cross-reference with the current firmware documentation.
- 3
Compare the parameter list with the drive firmware version installed. Use STARTER or online documentation to confirm parameter availability for your specific drive type and version.
- 4
If parameter does not exist, modify the BICO interconnection to use a valid output parameter that provides the required signal, or update drive firmware if the parameter is available in newer versions.
Back up all drive parameters and machine data before firmware updates
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