Operating Principle - Siemens SIMATIC ET 200M Operating Instructions Manual

Functions
8.2 Time stamping the input signals with IM 153-2
Sample configuration: Communication processor as DP master as well as a separate time master
Figure 8-12
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8.2.4.2

Operating principle

• The 240 data record is the configured data record for the time stamping on the ET 200M.
It defines which modules and which input channels of which type can be called upon by
the IM 153-2 for the time stamping.
When accepting the data record 240 the consistency of the data record with the
configured structure of the slave is checked.
As soon as this data record 240 is transmitted correctly to the IM 153-2 the time stamping
is activated.
• If the input signal on one of the monitored inputs changes, this event is time stamped by
the IM 153-2 and stored in one of hte data records 100 to 114.
144
Sample configuration: Communication processor as DP master as well as a separate time
master
Operator station (OS) for unit visualization
Industrial Ethernet
CPU
Communication processor for connection to an Industrial Ethernet
Communication processor as DP master
Automation system
ET 200M Distributed I/O
Digital input group; e.g. SM 321-7BH...
Time master
PROFIBUS DP
Operating Instructions, 04/2022, EWA-4NEB7806006-09
ET 200M