GROUPERR_FIFO_INVALIDDIMENSION

What does 42ED mean?

The FIFO dimension (number of axes) configured for the group is invalid, falling outside the supported range of [1 ... 8] or [1 ... 16] (depending on the TwinCAT version, with newer builds supporting up to 16 axes). This mismatch prevents the FIFO buffer from correctly managing motion commands for the intended number of axes in the group.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Correct the FIFO dimension parameter to match the actual number of axes in the group.

2. 4

   Save configuration changes and perform a full NC system restart.