Data Point Configuration - Siemens CP 1243-8 IRC Operating Instructions Manual

1: Mirroring back
The mirroring back function using the "Value monitoring" parameter can be configured for
the following data point types:
● Setpoint Output
● Parameter Output
The local values of the data points of this type can be monitored for change and the changes
transferred to the master with the Value monitoring function.
Changing a local value can, for example, be caused by manual operator input on site.
To allow the value resulting from local events or interventions to be transferred to the master
station, a mirroring back channel is generated for the relevant data point with the Value
monitoring function via which the locally changed value is mirrored back.
Remember that to use the mirror back function, you need to interconnect the local values in
the controller with the relevant PLC tag of the data point.
2: Block of data
With the ARRAY data type, blocks of data from contiguous memory areas up to a size of
4 .. 48 bytes can be transferred.
Compatible components of ARRAY are DINT, UDINT, DWORD or REAL. The components
within an array must be of the same type.
If the array is modified later, the data point must be recreated.
4.7.11

Data point configuration

Note
Status identifiers
The CP 1243-8 IRC does not supply any status identifiers.
Below you will find notes on the individual parameters of the data points of the CP 1243-8
IRC.
If the tooltips of STEP 7 refer to sections in the information system that are valid for several
CP types, the particular behavior of the CP 1243-8 is described at this point.
Parameters in the "General" tab
Data point index
The data point indexes must be unique in a CP.
Data point indexes assigned more than once in a CP are indicated as errors in the
consistency check and prevent the STEP 7 project being compiled.
CP 1243-8 IRC
Operating Instructions, 06/2015, C79000-G8976-C385-01
Configuration and operation
4.7 Configuration in STEP 7 Basic
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