Standard Diagnostics - Siemens CM 1542-5 Operating Instructions Manual

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
5.3

Standard diagnostics

The coding of the standard diagnostics bytes is explained below.
Byte 0: Station status 1
Table 5- 2 Structure of station status byte 1
Bit no. Name
7 Master_Lock
6 Parameter_Fault
5 Invalid_Slave_Response
4 Service_Not_Supported
3 Ext_Diag
CM 1542-5
Operating Instructions, 11/2018, C79000-G8976-C290-04
Overview of device-specific diagnostics of the CM with DP-V1 slaves
Byte
0
1
Interrupt type
2
3
Interrupt specifier
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.
This bit is set by the DP master when the master has requested a function that is
not supported by the DP slave.
Solution: Change the parameter setting to disable the function on the master.
This bit is set by the slave.
Bit =1: There is diagnostics data in the slave-specific diagnostics area. The
•
diagnostics data can be evaluated in the user program of the master.
Bit =0: There may be status information in the slave-specific diagnostics
•
area. The status information can be evaluated in the user program of the
master.
Device-specific diagnostics
Meaning
Header
Variant
Slot number
Variant
Module-specific diagnostics data
Diagnostics and upkeep
5.3 Standard diagnostics
Variant
Status type
Variant
Status specifier
37