Omron CJ1W-PRT21 Operation Manual page 83

B-2 Diagnostics
PROFIBUS-DP specifies standard diagnostics and extended diagnostics. The standard diagnostics have a
fixed format defined in the PROFIBUS standard. The extended diagnostics are meant for user diagnostics.
CJ1W-PRT21 provides extended diagnostics to inform the PROFIBUS master unit about the status of the
slave unit and its host PLC.
• PLC PROGRAM mode
• Fatal bus error
• Error message (FAL/FALS code)
• Invalid start address input area
• Invalid end address input area
• Invalid start address output area
• Invalid end address output area
Note Extended diagnostics are sent to the master upon mode changes or when error codes are changed.
Byte
7 6
0
1
2
3
4
5
6 0 0
7 Fatal Non-fatal
error
error
(FAL)
(FALS)
8 Invalid Invalid
End Start
address address
output output
area area
9
10
64
5 4
<According to PROFIBUS standard>
<According to PROFIBUS standard>
<According to PROFIBUS standard>
<Address of master unit [hex]>
06
02
0 0
CPU
waiting
Invalid Invalid
End Start
address address
input input
area area
3 2 1
0 1 0
Output
off
Appendix
Designation
0
Station_status_1
Station_status_2
Station_status_3
Diag.Master_Add
Ident_Number_High
Ident_Number_Low
1 5 bytes of Device
related diagnostics
PLC Status High
PRO- PLC status Low
GRAM
mode
Error code as in PLC
A400 (High byte)
Error code as in PLC
A400 (Low byte)