Indicators And Error Processing - Omron E5ARER User Manual

Indicators and Error Processing

7-1 Indicators and Error Processing
7-2
The following table lists the indicator status when errors occur, the probable
causes and processing.
Indicator status Probable cause
MS: OFF The power is not being
supplied to the Control-
NS: OFF
ler.
The power voltage is
not within the permitted
range.
The Controller is faulty.
MS: Flashing red A checksum error has
occurred in the parame-
NS: No change
ters registered in
EEPROM.
A EEPROM hardware
error has occurred.
MS: ON red The Digital Controller is
faulty
NS: OFF
MS: ON green Waiting to connect to
DeviceNet communica-
NS: Flashing green
tions.
The Digital Controller is
faulty.
MS: ON green The DeviceNet is in Bus
OFF status.
NS: ON red
Node addresses dupli-
cated.
The Controller is faulty.
MS: ON green A communications time-
out has occurred.
NS: Flashing red
The Digital Controller is
faulty.
Section 7-1
Remedy
Supply communications power from
the DeviceNet connector.
Use a power supply voltage within the
permitted range.
Replace the Controller.
Repairs are required if this error per-
sists even if the parameters are reset.
Contact your nearest OMRON repre-
sentative.
Repairs are required. Contact your
nearest OMRON representative.
Check the following items and restart
the Controller.
• Are lengths of cables (trunk and
branch lines) correct?
• Are cables short-circuited, broken,
or loose?
• Are cables wired correctly?
• Is terminating resistance connected
to both ends of the trunk line only?
• Is noise interference excessive?
• Is the power to the master ON?
Repairs are required. Contact your
nearest OMRON representative.
Check the following items and restart
the Controller.
• Are lengths of cables (trunk and
branch lines) correct?
• Are cables short-circuited, broken,
or loose?
• Is terminating resistance connected
to both ends of the trunk line only?
• Is noise interference excessive?
Reset node addresses correctly.
Repairs are required. Contact your
nearest OMRON representative.
Check the following items and restart
the Controller.
• Are lengths of cables (trunk and
branch lines) correct?
• Are cables short-circuited, broken,
or loose?
• Is terminating resistance connected
to both ends of the trunk line only?
• Is noise interference excessive?
Repairs are required. Contact your
nearest OMRON representative.