Diagnostics / service
8.5 Diagnostics with data sets
Modular Safety System 3RK3
270 System Manual, 10/2008, 926 2530-02 DS 02
8.5 Diagnostics with data sets
8.5.1 Using data sets
This section contains information about the data sets provided with MSS central unit / DP
interface and how best to use them.
Target groups
This section is aimed at the following target groups:
● Configuration engineers
● PLC programmers
Required knowledge
You need to have a sound knowledge of writing/reading data sets
Data sets: overview
Module Data set no. Description Read/write
3RK3 Basic
DP interface
0/1 System diagnostics Read
3RK3 Basic 92 Device diagnostics
(faults, alarms,
messages)
Read
Reading data sets
Accessing data sets via slot:
● Access to data set from DP interface via Slot_0
● Access to data set from 3RK3 Basic via Slot_1
Reading data sets with STEP 7
You can access the data sets from the user program.
Reading data sets:
● S7-DPV1 master: by calling SFB 52 "RD_REC" or SFC 59
● S7 master: by calling SFC 59
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