Siemens SIMATIC PCS 7 Operating Instructions

Path / tab Parameter Value
Diagnostics / Clock >
Synchronization
Type of synchroniza‐
tion
in the AS none or as slave
7.4.5 Time stamping in the redundant system
The IM 650 supports the time stamping function even in the redundant system.
Time stamping of signal changes in a redundant system
Both IM°650 modules save the messages of the time-stamped signals. After a changeover
from the active to passive IM 650, the "new" active IM 650 can thus provide the current
messages for further processing.
Note
During the changeover between the two IM 650 modules, signal changes are not time stamped.
This time is communicated by the special message "Changeover at redundancy BEGINNING /
END".
You can find more information on time stamping in redundant systems in the "PCS 7
documentation (http://support.automation.siemens.com/WW/view/en/10806846/130000)".
Functions
7.4 Time stamping of the input signals with IM 650
ET 200PA SMART
Operating Instructions, 06/2019, A5E34192013-AB 79

Siemens SIMATIC PCS 7 Specifications

General

Brand	Siemens
Model	SIMATIC PCS 7
Category	Control Systems
Language	English