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Overview of device-specific diagnostics
The device-specific diagnostics data depends on the protocol variant operating on the DP
slave:
• DP-V1 slave
Table 5- 1
4...62
• DP-V0 slave
Table 5- 2
1...62
5.1.3
Standard diagnostics
The coding of the standard diagnostics bytes is explained below.
Byte 0: Station status 1
Table 5- 3
Structure of station status byte 1
Bit no.
Name
7
Master_Lock
6
Parameter_Fault
5
Invalid_Slave_Response
SIMATIC CM 1242-5
Operating Instructions, 01/2023, C79000-G8976-C245-06
Overview of device-specific diagnostics of the CM with DP-V1 slaves
Byte
0
1
Interrupt type
2
3
Interrupt specifier
Overview of device-specific diagnostics of the CM with DP-V0 slaves
Byte
0
Explanation
The DP slave was assigned parameters by a different DP master. The DP slave can
only be read by the configured productive DP master.
This bit is set by the DP master when its bus address differs from the configured
address.
The last received parameter assignment frame was bad or not permitted. The DP
slave sets this bit.
Solution: Check the parameter settings for illegal parameters.
This bit is set by the DP master when no plausible response has been received
from the DP slave.
Device-specific diagnostics
Meaning
Header
Variant
Slot number
Variant
Module-specific diagnostics data
Device-specific diagnostics
Meaning
Header
Module-specific diagnostics data
Diagnostics and upkeep
5.1 Diagnostics
Variant
Status type
Variant
Status specifier
33
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