Service and maintenance
7.7 Troubleshooting with the PROFIBUS DP
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
7-11
Standard diagnostics
When the parameter P2041.03 = 0, then by using the read-only parameter r2054 and it’s
indices, it is possible to obtain detailed diagnostic information regarding the PROFIBUS DP
interface. This information is listed in table below.
Table 7-4 Standard diagnostics
Parameter Meaning
PROFIBUS DP status:
0: Off
1: Baud rate search
2: Baud rate found
3: Cyclical data exchange
r2054.00
(> 100: other diagnostic screen active)
r2054.02 Number of acyclical links with class 2 master (PC, OP): 0 … 2
r2054.03 Error number of last unsuccessful parameter access operation through an acyclical
link.
r2054.04 Parameter number of last unsuccessful parameter access operation
r2054.05 Sub-index of last unsuccessful parameter access operation
When parameter accessing errors occur, r2054.03 display the appropriate error number,
these are listed in table below.
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