Omron CJ Series User Manual

7 Troubleshooting and Maintenance
7-30
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
System-defined
variables
Variable Data type Name
*_MstrMdCmdErr BOOL Mode Command Error
Cause and cor-
rection
Assumed cause Correction Prevention
More than one command mode
switch has been set.
Control only one command mode
switch.
Do not attempt to control multiple
command mode switches simultane-
ously or prevent with User Program.
A mode command switch is set while
the previous command is in progress.
Wait until the Unit has finished switch-
ing modes before attempting to set a
new command mode switch.
Do not issue a mode change while
the Unit is in transition. Check that the
commanded operating mode has suc-
cessfully completed before issuing a
new mode change.
A mode transition command is given
and the Unit has detected that it does
not (yet) have a valid configuration or
it detected an internal error, either of
which prevented it from reaching that
mode, e.g. Invalid Parameter set and
transition to OPERATE mode.
Correct the invalid configuration
and/or internal error and re-issue the
required command mode switch.
Do not attempt to change modes
when an invalid configuration or inter-
nal error is present.
Attached
information
None
Precautions/
Remarks
None
Event name Disturbed Bus Error Event code 88040000 hex
Meaning Distorted messages may have been received by the Unit.
Source Function Module Source details CJ-series Unit Detection
timing
At network opera-
tion
Error attributes Level Minor Recovery Cycle the Power
Supply
Log category System
Effects User program
Continues
Operation During network operation the Unit detects distorted mes-
sages and will switch to OFFLINE mode.
System-defined
variables
Variable Data type Name
*_MstrBusErr BOOL Disturbed Bus Error
Cause and cor-
rection
Assumed cause Correction Prevention
Missing or invalid termination Check the termination on the appro-
priate devices.
Follow specific termination resistance
requirements set in this manual.
Faulty wiring Check the wiring. Follow specific wiring guidelines set in
this manual.
A cable has been used which is too
long for the selected baud rate.
• Correct the baud rate setting to
reflect the actual length of cable or
change the cable length based on
the required baud rate.
• Install repeater(s) if a longer cable
is needed.
Follow maximum cable length specifi-
cations set in this manual.
Attached
information
None
Precautions/
Remarks
None
Event name PROFIBUS Protocol Error Event code 88050000 hex
Meaning A PROFIBUS protocol error has occurred and tokens have been lost.
Source Function Module Source details CJ-series Unit Detection
timing
At network opera-
tion
Error attributes Level Minor Recovery Switch the Unit to
CLEAR/OPER-
ATE mode again
Log category System

Omron CJ Series Specifications

General

Brand	Omron
Model	CJ Series
Category	Controller
Language	English