Configuration, Programming; Configuration In Step 7; Program Blocks For Communication And Distributed I/O - Siemens CM 1542-5 Operating Instructions Manual

Configuration, programming

4.1

Configuration in STEP 7

Configuration in STEP 7
You configure the CM in SIMATIC STEP 7. You will find the required version in the section
Project engineering (Page 18).
You will find complete information on configuration in the STEP 7 information system.
Loading and saving the configuration data
When you load the station, the project data of the station including the configuration data of
the CP is stored on the CPU. You will find information on loading the station in the STEP 7
information system.
4.2

Program blocks for communication and distributed I/O

Program blocks (instructions) for communications services
For communications services, there are preprogrammed program blocks (instructions)
available as the interface in your STEP 7 user program.
Table 4- 1
System blocks and sys-
tem functions
DPSYC_FR
DPNRM_DG
DP_TOPOL
WRREC
RDREC
GETIO
SETIO
GETIO_PART
SETIO_PART
D_ACT_DP
DPRD_DAT
CM 1542-5
Operating Instructions, 11/2018, C79000-G8976-C290-04
Instructions for PROFIBUS DP
Meaning when used with CM
DP slaves synchronize / freeze inputs (SYNC/FREEZE instruction)
Reading the diagnostics data of a DP slave
Detecting the topology for the DP master system
Writing the data record of a DP slave
Reading the data record of a DP slave
Reading the process image of a DP standard slave
Transferring the process image of a DP standard slave
Reading the process image partition of a DP standard slave
Transferring the process image partition of a DP standard slave
Disable / enable DP slaves
Reading consistent data of a DP standard slave (user data)
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