Defining Cir Elements - Siemens SIMATIC CPU 410 System Manual

Plant changes in RUN - CiR
11.8 Procedure for PROFIBUS DP
11.8.1.2

Defining CiR Elements

Adding CiR elements automatically
Note
The automatic addition of CiR elements is only possible if a CiR object is not yet present on
the selected DP master system.
The automatic addition of CiR elements is not available on DP master systems that are
downstream of an IM 157.
If you want to automatically add CiR elements in an existing DP master system, proceed as
follows:
1. Select the relevant DP master system in the upper part of the station window.
2. In the Edit menu, select the "Master System > Activate CiR capability" command.
STEP 7 then adds the following CiR elements on the selected DP master system:
– A CiR module on each CiR-capable modular slave (if slots are still available).
– A CiR object on each lower-level CiR-capable PA master system.
– A CiR object on the selected DP master system.
3. The default settings of the CiR objects are the same for all CPUs. For this reason, after
activation of CiR capability of a master system, you should check each associated CiR
object to determine whether the CiR synchronization time of the master system specified
in the properties window of the CiR object is compatible with the CiR synchronization time
of the CPU.
Adding a CiR object on the DP or PA master system
If you want to add a CiR object in a DP or PA master system, proceed as follows:
1. Select the relevant master system in the upper part of the station window.
2. Open the "Hardware catalog" window.
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This CiR module contains so many input and output bytes that a reasonable number is
available for later use on the modular slave.
This CiR object contains 80 input bytes and 80 output bytes.
STEP 7 attempts to guarantee 15 slaves and to make available 1220 input bytes and
1220 output bytes for this CiR object. If the largest address up to now on this master
system is greater than 110, correspondingly fewer slaves can be guaranteed. If fewer
than 1220 input bytes and 1220 output bytes are available, the number is reduced
accordingly.
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC