Omron CJ1W-PRT21 - Standard and Extended Diagnostics

4-5
4 Troubleshooting and Maintenance
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
4-2 Standard and Extended Diagnostics
4
4-1-3 Errors During Normal Operation
4-2 Standard and Extended 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 CPU.
• CPU PROGRAM mode
• Fatal bus error
• Error message (FAL/FALS code)
*1
• Invalid start address input area
• Invalid end address input area
• Invalid start address output area
• Invalid end address output area
Note Note Extended diagnostics are sent to the master upon mode changes or when error codes are
changed.
Byte
Bit Position
Designation
7 6 5 4 3 2 1 0
0 <According to PROFIBUS standard> Station_status_1
1 <According to PROFIBUS standard> Station_status_2
2 <According to PROFIBUS standard> Station_status_3
3 <Address of master unit [hex]> Diag.Master_Add
4 06 Ident_Number_High
5 02 Ident_Number_Low
6 0 0 0 0 0 1 0 1 5 bytes of Device related
diagnostics
7 PLC Status High
8 Invalid
End
address
output
area
Invalid
Start
address
output
area
Invalid
End
address
input
area
Invalid
Start
address
input
area
PRO-
GRAM
mode
PLC status Low
9
Not Applicable
10
Not Applicable