BICO: Writing to parameter not permitted as the master control is active

What does 201515 mean?

This alarm occurs when an attempt is made to change the number of Command Data Sets (CDS) or copy from a CDS while the master control is still active. Parameters related to BICO (Bi-directional interconnection) configurations cannot be altered under these conditions to maintain system integrity. This is a functional restriction rather than a critical fault, typically requiring no immediate action as the system prevents an invalid operation.

• Attempting to change parameters related to Command Data Sets (CDS) or BICO interconnections (e.g., P0800, P0801) while the drive is enabled or running (master control active).
• Incorrect sequencing in the PLC program: trying to write configuration parameters before placing the drive into a disabled or parameterization-ready state (e.g., P0840=0).
• Drive operating in a safety-relevant mode (e.g., P9500 active) that prevents dynamic changes to control parameters.
• An external command (e.g., from a higher-level controller or HMI) is overriding local parameter changes.
• The 'master control' parameter (e.g., P0840) is configured to a source that is always active, preventing parameter changes.

Click steps to track your progress.

1. 1

   1. Before attempting to modify BICO or CDS-related parameters, set the master control to OFF (e.g., P0840 = 0 from PLC or via operator panel).

2. 2

   2. Ensure the drive is in a safe, disabled state (e.g., main contactor open, STO active if applicable) before attempting parameter changes.

3. 3

   3. Sequence the PLC program to write these parameters only during initial commissioning or a controlled machine shutdown.

4. 4

   4. Check for any active safety functions (e.g., STO) that might be preventing parameter writes while active.

5. 5

   5. If using an engineering tool (e.g., TIA Portal), ensure online parameter changes are allowed, or perform an offline download.