Siemens SIMATIC ET 200M Operating Instructions Manual page 132

Functions
8.2 Time stamping the input signals with IM 153-2
8.2 Time stamping the input signals with IM 153-2
8.2.1 Principles
It is possible to time stamp with IM 153-2
● within an S7-400 automation system
● outside of an S7-400 automation system, with precisions of up to 1 ms
Controlling
You can use the time stamping for selected input signals, and for those that are of relevance
to your application. On an ET 200M, the input signals of maximum 128 digital inputs can be
time stamped. For a better load distribution on the PROFIBUS DP and in the IM 153-2 we
recommend distributing these signals if necessary over several IM 153-2.
The IM 153-2BAx2 interface module supports time stamping of input signals from a
maximum of 32 digital inputs per slot. The existing limit of a maximum of 128 time-stamped
channels (DI) per ET 200M is retained.
You can specify the following digital input modules for the time stamping:
● 6ES7321-7BH01-0AB0 (1 ms)
● 6ES7321-7TH00-0AB0 (10 ms)
● 6ES7321-7RD00-0AB0 (10 ms)
● 6ES7326-1BK01-0AB0 (30 ms)
The figures shown in brackets specify the maximum possible precision. You should also note
the installation guidelines for the respective accuracy class.
130
STEP 7
– with whilst using the FB 62 (FB TIMESTMP) with 10 ms precision or as a
highly precise time stamping with 1 ms precision
(refer to the online help for
– with the PCS 7 system solution whilst using the FB 90 (FB IM_DRV) with 10 ms
precision
You´ll find a detailed description for time stamping with 10 ms precision and for time
synchronization in the PCS 7 function manual "Process control system PCS 7 10 ms
time stamping (http://support.automation.siemens.com/WW/view/en/15231179)".
STEP 7
)
Operating Instructions, 12/2008, EWA-4NEB780600602-08
ET 200M