4-5
4 Troubleshooting and Maintenance
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
4-
2
S
tan
dard and E
x
tend
ed
D
iagn
o
st
ics
4
4-
1-3 Er
rors Dur
in
g 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