6-18
Communications Processor CP 541
EWA 4NEB 812 6188-02
6.3.3
Device-Related Diagnosis
The device-related diagnosis is contained in bytes 6 and 7.
Table 6-10
Structure of Bytes 6 and 7 of the Diagnostic Message
Byte
Value
Content
6
02
H
Length of device-related diagnosis in bytes inc. header
7
0X
H
Device-related diagnosis
The significance of the individual bits can be found in
Table 6-11.
The device-related diagnosis (byte 7) is arranged as shown in Table 6-11. A
report is signaled with a 1.
Table 6-11
Structure of the Device-Related Diagnosis, Byte 7 of the Diagnostic Message
Bit
1
Meaning
Cause/Reaction
Remedy
0
Response monitoring in
CP 541 elapsed
The PLC at the CP 541 has not
reported with a DP message,
within the time specified with
parameter DPWD in DB1.
Inspect the connection between
CP 541 and PLC for an open-
circuit.
Check the PLC connected to
the CP 541 for faults.
Increase the monitoring time
specified in DPWD.
Change the user program in the
PLC for more frequent sending
to the DP master.
1
PLC is sending again.
Detected failure of the DP con-
nection between CP 541 and
PLC no longer exists.
–
1
Bits not mentioned are not significant.
Range
Contents
Device-Related
Diagnosis
Diagnostics and Error Handling