Omron NE1A-SCPU01 - 07-2009 Operation Manual page 269

Indicator/Display Status and Corrective Actions for Errors
Abort Errors
Indicators/display
MS NS
Flashing
Flashing
green or
red
Lit green
Nonfatal Errors
Indicators/display
NS Seven-
segment
display
F0
Node
Lit red
address of
error
F1
Node
Lit red
address of
error
L9
Master node
address
Flashing
red
dA
Destination
slave node
Flashing
address
red
d5
Destination
slave node
Flashing
address
red
d6
Destination
slave node
Flashing
address
red
d6
Destination
slave node
Flashing
address
red
E0
Node
OFF
address of
error
Error history
Seven- Name
segment nonvolatile
display
E8 Switch Yes
Node Setting Mis-
address of match
error
Error history
I/O Name
--- Duplicate MAC ID
--- Bus OFF
--- Standard I/O
Connection
Timeout
--- Safety I/O
Connection
Timeout
--- Nonexistent Slave
Device
--- Safety I/O
Connection
Establishment Fail-
ure
--- Invalid Slave
Device
--- Network PS
Voltage Low
Saved in Cause
memory
The node address and
baud rate were changed
after the normal comple-
tion of configuration
download.
Cause
Saved in
nonvola-
tile
memory
See note Node address
1. duplication
(Same node
address set for
more than one
node.)
See note Bus Off
1. (Communica-
tions cut off
because of fre-
quent data
errors.)
See note Standard I/O
1. connection
timeout
See note Safety I/O
1. connection
timeout
See note No slave
1.
See note Safety I/O con-
1. nection establish-
ment error
See note Invalid slave
1. device (verifica-
tion error)
See note Network power
1. supply voltage
low error
Section 12-3
Corrective actions
• Configure the switches prop-
erly.
• Reset the configuration data.
Corrective actions
Check the node addresses of
other nodes.
Switch ON the power supply
again after reconfiguring with-
out duplication.
Check the following points and
take corrective actions for each,
then turn ON the power supply.
• Make sure the baud rate is the
same for all nodes.
• Make sure the cable lengths
(main/branch) are not too
long.
• Make sure the cable is not dis-
connected or loose.
• Make sure terminating resis-
tance is at both ends of the
main line and only at both
ends.
• Make sure that there is not a
lot of noise.
Check the following points:
• Make sure the baud rate is the
same for all nodes.
• Make sure the cable lengths
(main/branch) are not too
long.
• Make sure the cable is not dis-
connected or loose.
• Make sure terminating resis-
tance is at both ends of the
main line and only at both
ends.
• Make sure that there is not a
lot of noise.
Check the slave device.
• Make sure it its configured.
• Make sure it is in a normal
operational state.
Verify the slave device (select
Device - Parameters - Com-
pare) and connect a suitable
slave device.
Check the following points:
• Make sure the power supply
voltage is set within the speci-
fied range.
• Make sure a cable or wire is
not disconnected.
235