Counting; Properties - Siemens SIMATIC ET 200iSP Operating Instructions Manual

How time stamping works in the redundant system
Both interface modules store the messages of the time stamped signals. This means the "new"
active interface module can forward the latest messages to the OS after switching from the
active to the passive interface module.
The signal changes are not time stamped while switching between the two interface modules.
In the OS, you can see in which time period no time stamping took place.
Example time stamping in redundant system
Figure 4-9
4.17

Counting

4.17.1

Properties

Counting functions
The electronic module 8 DI NAMUR is equipped with parameterizable counting functions:
• 2 x 16-bit up-counters (standard counting function) or
• 2 x 16-bit down counters (standard counting function) or
ET 200iSP
Operating Instructions, 11/2022, A5E00247483-AK
Example configuration with two interface modules for redundancy in an H-system
Configurations (principle)
4.17 Counting
91