Configuration Options with the ET 200M
3-5
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
3.4 Time Stamping with the IM153-2
Time stamping with IM 153-2 is possible
in customer applications which use FB 62 (FB TIMESTMP)
(see online help for STEP 7)
with the PCS 7 system solution with accuracy of 10 ms
A detailed description of time stamping with 10 ms accuracy and time
synchronization can be found in the PCS 7 function manual ”10 ms Time
Stamping”.
Operating Principle
You set parameters to determine which user data of the IM 153-2 is monitored. For
time stamping it is digital inputs which are monitored for signal changes.
A changed input signal is given a time stamp and stored in a buffer (data record). If
time-stamped signals exist or a data record is full, a process interrupt for the DP
master is generated. The buffer is evaluated with ”Read Data Record”. Special
messages are generated in the case of results which influence time stamping
(interrupted communication with DP master, message failure from time master, ...).
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