Siemens SINUMERIK 828D Function Manual page 466

H2: Auxiliary function outputs to PLC
8.16 Supplementary conditions
Auxiliary function: M1 (conditional stop)
Overlapping of the parameterized output behavior
The parameterized output behavior of the auxiliary function M1 is overridden by the output behavior defined in the
following machine data:
MD20800 $MC_SPF_END_TO_VDI, Bit 1 (subprogram end / stop to PLC)
Bi
Value Description
t
1 0 The auxiliary function M01 (conditional stop) is always output to the PLC. A quick
acknowledgement is ineffective, because M01 is permanently assigned to the first
auxiliary function group and is therefore always output at the end of the block.
1 The auxiliary function M01 (conditional stop) is only output to the PLC, if the function:
"Programmed stop" is activated via the HMI user interface.
In the case of a quick acknowledgement, the M1 is output to the PLC during the motion.
While the function is not active, this does not interrupt continuous-path mode.
Part program blocks without traverse movement
In a part program block without a traverse movement, all auxiliary functions are output in a block immediately,
irrespective of their parameterized output behavior.
466
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions