CRITICALAlarm code
842

SUB PROGRAM NESTING EXCEEDED (WNo., NNo., BNo.)

What it means

1. The total number of sequential calls of subprogram has exceeded eight. 2. Execution of a program that includes an “M99” command was attempted in the direct operation mode using HD or Ethernet. 3. The program in the HD or host called a program stored in the HD or host.

What to do
  1. 11.
  2. 2Check the number of subprogram calls, and correct the program so that the number of calls does not exceed eight.
  3. 32.
  4. 4Do not include an “M99” command in the main program to be executed in the direct operation mode.
  5. 53.
  6. 6Do not call a subprogram stored in the HD or host from a program stored in the HD or host.
Codebook — decoded
BError typeRegistered Data — program or tool data error
I (L)Stop statusunspecified
O (S)Clearingunspecified
Still faulted after these steps? Do not restart under load — ask the Mazatrol assistant.
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