Siemens SIMATIC S7-1200 CP 1243-8 IRC Operating Instructions Manual page 129

The formats and S7 data types of the PLC tags that are compatible with the protocol-specific
data point types of the module can be found in the section Datapoint types (Page 135).
Access to the memory areas of the CPU
The values of the PLC tags or DBs referenced by the data points are read and transferred to
the communications partner by the module.
Data received from the communications partner is written by the module to the CPU via the
PLC tags or DBs.
Configuring the data points and messages in STEP 7
You configure the data points in STEP 7 in the data point and message editor. You can open
both editors alternatively as follows:
● Selecting the communication module
Shortcut menu "Open the data point and messages editor"
● Via the project navigation:
Project > directory of the relevant station > Local modules > required communication
module
By double-clicking on the entry, the data point or message editor opens.
Figure 4-8
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
Configuring data points and messages
Configuration
4.18 Data points
129