Siemens CM 1542-5 Manual page 26

Interrupts, diagnostics messages, error and system alarms
6.3 DP slave diagnostics
User program (DP master)
To read out the diagnostics data of the DP slave (DP single diagnostics), use the
"DPNRM_DG" instruction on the DP master.
Diagnostics interrupts of DP-V1 slaves are evaluated in the user program of the master
using the "RALRM" instruction.
You will find the required parameter assignment for the instructions in the STEP 7 online
help.
Below, there is an overview of the structure of the diagnostics data.
Overview of standard diagnostics
Overview of device-specific diagnostics
The device-specific diagnostics data depends on the protocol variant operating on the DP
slave:
● DP-V1 slave
Table 6- 2
4...62
26
Byte
0
1
2
3
4...5
Overview of device-specific diagnostics of the CM with DP-V1 slaves
Byte
0
1
Interrupt type
2
3
Interrupt specifier
Standard diagnostics
Meaning
Station status 1
Station status 2
Station status 3
Master address
Vendor ID of the slave
Device-specific diagnostics
Meaning
Header
Variant
Slot number
Variant
Module-specific diagnostics data
Variant
Status type
Variant
Status specifier
Manual, 11/2014, C79000-G8976-C290-02
CM 1542-5