Omron DeviceNet CV Series Operation Manual page 334

Troubleshooting
Display
E8 Internal non-volatile memory data error
F0 Duplicate node address error
F1 Bus Off error
Master Unit baud rate setting error
F3 Front/rear-panel DIP switch setting error
• Pin 4 of front-panel DIP switch is ON.
• Pins 1 and 2 of front-panel DIP switch are
ON.
• Pin 7 or 8 on rear-panel DIP switch is ON.
F6 CPU Unit interface error from noise
F9 Hardware error
Identifying Errors from Symptoms
Symptom
The power is ON, but the Slave Unit's
indicators are all OFF.
The Read/Write Area's settings have
been set, but data is not being
refreshed according to the settings.
After setting the areas and operating
the Unit, the data in the output area fre-
quently appears as unexpected values.
When reading the Slave's DM Area
from the Master, unstable values are
returned and the data is unreadable.
The Explicit Connection Established
Flag is ON in the C200H I/O Link Unit's
status words, but Unit is not receiving
an explicit message from the Master.
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Probable cause
Probable Cause
CPU Unit error caused by noise inter-
ference.
The settings have not been validated.
The Unit has not been reset.
The area settings are overlapping with
those of other Communications Units.
Attempt was made to access of words
from DM 4096 onwards in the
C200HE-CPU11 CPU Unit.
The Network cables are disconnected,
or the Master Unit's power supply is
OFF. (OMRON Master Units do not
have timeouts when explicit message
communications are used, so the
Explicit Connection Established Flag
will not turn OFF even if communica-
tions are stopped).
Possible remedy
1.Set the Read/Write Area settings using bit 00 of the soft-
ware switches.
2.Restart the Unit.
3.If the error is not cleared, replace the Unit.
Reset the node address to a number that is not used by
another Unit, and restart the Unit.
1.Check that the DeviceNet communications cables are
wired connected, and that noise preventative measures
have been taken.
2.Restart the Unit.
Make sure that the baud rate settings match and restart
the Unit.
• Make sure pin 4 on the front panel, and pins 7 and 8 on
the rear panel are turned OFF.
• Turn ON or OFF pins 1 and 2 according to the correct
baud rate setting.
Remove cause of noise and restart the Unit.
If the error is not cleared, replace the C200H I/O Link Unit
or the CPU Unit.
1.Restart the Unit
2.If the error is not cleared, replace the Unit.
Restart the Unit.
1.Turn ON bit 00 of the software
switches.
2.Reset the Unit.
Restart the PLC or turn ON and OFF
the Unit's Restart Bit. With C200HX/
HG/HE PLCs, these bits are in AR 01.
With CS-series PLCs, these bits are in
words A502 to A507.
Check the area settings of other Com-
munications Units, and correct settings
so that data is not written to an area
already being used by another Unit.
Access the correct words only.
Restart the Master Unit, or connect the
cables correctly. (Timeouts cannot be
set for OMRON Master Units using
explicit message communications.)
Section 8-2
Possible remedy
317