Siemens SINUMERIK 840D sl Function Manual page 1111

Error identifiers
If it was not possible to execute a job, the failure is indicated by "logic 1" on status parameter
error. The error cause is coded at the block output State:
State
3
6
7
9
Pulse diagram
(1)
(2)
(3)
(4)
(5)
(6)
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Meaning
Negative acknowledgment, job
not executable
FIFO full
Option not set
Transmission occupied
Activation of function
Positive acknowledgment: PI service has been executed
Reset function activation after receipt of acknowledgment
Signal change by means of FB
If function activation is reset prior to receipt of acknowledgment, the output signals are not
updated without the operational sequence of the activated function being affected.
Negative acknowledgment: Error has occurred, error code in the output parameter State
2.12 Block descriptions
Note
Internal error, any help:
NC RESET
Job must be repeated since queue is full
BP parameter "NCKomm" is not set
Job must be repeated
Detailed description
127