4.9
Time synchronization and time stamping
4.9.1
Overview - Time synchronization and time stamping with ET 200SP HA
Introduction
The following sections show the possibilities for time synchronization of distributed I/O based
on SIMATIC ET 200SP HA.
The time synchronization is only relevant when using time stamping.
Time synchronization options
Table 4-11
Explanations of the configurations with time stamping by the distributed I/O with ET 200SP
HA
No. Configuration
Quick reference guide
Setup example
1
Split plant bus
Division of the plant bus is mandatory
when using time stamping with an ac‐
curacy of 1 ms.
You can find information on this in
the section "Plant-wide time syn‐
chronization and time stamping
with a precision of 1 ms (Page 52)"
2
Configurations
with a single CPU
Connection via redundant media
(2 PROFINET IO systems) using re‐
dundant interface modules
You can find information on this in
the section "Time synchronization
and time stamping with a single
3
Configurations
with redundant
CPU
Using redundant I/O modules in an IO
device
You can find information on this in
the section "Time synchronization
and time stamping with redundant
Additional information
● Function manual
SIMATIC; ET 200SP HA; ET 200SP HA - Time Stamping
● If PCS 7 is used:
Function manual
SIMATIC; Process Control System PCS 7; High-precision Time Stamping
with ET 200SP HA
4.9.2
Plant-wide time synchronization and time stamping with a precision of 1 ms
Time synchronization of events
When a plant has multiple automation systems, the time stamps of events should be
comparable.
The comparison of time stamps of events is based on the time synchronization of the
associated automation systems.
Plant planning
4.9 Time synchronization and time stamping
ET 200SP HA Distributed I/O system
52
System Manual, 08/2019, A5E39261167-AD
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