Reaction Of The Output Modules In Stop Or Halt State; Diagnosis Function: Time Measurement At Fm456-4 - Siemens SIMATIC PCS 7 Manual

4.9.3

Reaction of the Output Modules in STOP or HALT State

4.9.4

Diagnosis Function: Time Measurement at FM456-4

Connecting TM I/O to PCS 7
C79000-G8076-C710-04
With transition from RUN state to STOP or HALT state of the CPU41x the
values at the TELEPERM M output modules normally remain unchanged.
This reaction can be changed by configuration.
For that the following pseudo module has to be defined within DB1 of the
FM456-4:
STOP:NULL_TO_OUT
Module type:
Cycle: n = 0 or 0 < n < 21, with:
n = 0 (default value): The last output values survive if the
0 < n < 21:
This function gives information about the FM456-4 load, and about the com-
munication running times between CPU41x and FM456-4.
But the interpretation of this data can only be done by the TELEPERM M
support.
With the following configuration of a pseudo module within the DB1 data
block of the FM456-4 this diagnosis function can be switched on/off:
Module type: DIAG_FM456***
Cycle: n = 0 or n > 0, with:
n = 0 (default value): Diagnosis / time measurement
n > 0:
CPU goes to STOP or HALT.
If the CPU goes to STOP or HALT,
the outputs are set to zero if a corres
ponding setting has been done on the
module. On this (n-1) * 250 msec
will be waited between occurrence
of the STOP/HALT state and the
zero output.
If the CPU changes from the STOP/
HALT state to the RUN state during
this waiting period, the last output
state survives.
deactivated on the FM456-4.
Diagnosis / time measurement activated
on the FM456-4.
Configuration
4-19