4 Troubleshooting and Maintenance
4-4
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
OFF
ON
PROFIBUS
communication
error
•
*_StartCommCmd
is FALSE
•
The PROFIBUS configura-
tion is not correct.
•
The PROFIBUS wiring is not
correct.
•
The PROFIBUS Master Unit
is malfunctioning.
•
The Slave Unit is defective.
•
Change the
*_StartCommCmd
to TRUE.
•
Verify that the correct GSD-file is used in
the master. Also check the Slave Unit’s
station address is matching the Master
Unit’s configuration. Look for station dupli-
cation address occurrences.
•
Check for errors in the start/end address
and area settings in the Master. Examine
the status of variables
*_StartAdrInErr,
*_EndAdrInErr, *_StartAdrOutErr
, and
*_EndAdrOutErr
for more information.
•
Check the transmission lines for proper
connection and correct wiring according to
the recommended procedures (see
•
Replace the Master Unit.
•
Replace the Slave Unit.
OFF
Flashing
Parameter/Con-
figuration Error
•
Invalid configuration in PRO-
FIBUS Master Unit.
•
The Slave Unit is defective.
•
Check
*_ParamErr
variable details in
.
•
Verify the configuration and parameter
data of the Slave Unit.
•
Verify the configuration of the Master Unit.
•
Check the baud rate.
•
Replace the Slave Unit.
ON
---
No I/O Data
Exchanged
•
Another mounted Unit has
overlapping memory areas.
•
Slave in Sync or Freeze
mode.
•
Watchdog is off.
•
Slave Unit is defective
•
Check the status of the bits in
*_SlvSta.
•
Check other Unit for incorrect mapping of
data.
•
Check the mode commanded from the
Master Unit.
•
Check the transmission lines for proper
connection and correct wiring according to
the recommended procedures (see
•
Enable the watchdog.
•
Replace the Slave Unit.
COMM
BF
Error
Probable Cause
Remedy