Omron NE1A-SCPU01 - 2006 Operation Manual page 238

Indicator/Display Status and Corrective Actions for Errors
Indicators/display
NS Seven-
segment
display
L9
Master node
address
Flashing
red
dA Desti-
nation slave
node
Flashing
address
red
d5 Desti-
nation slave
node
Flashing
address
red
d6 Desti-
nation slave
node
Flashing
address
red
d6 Desti-
nation slave
node
Flashing
address
red
E0
Node
OFF
address of
error
--- E2
Node
address of
error
A0
Node
address of
Flashing
error
red
A1
Node
address of
Flashing
error
red
Error history
I/O Name
--- 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
--- Transmission
Timeout
--- Relevant Safety I/O
communication
stopped because of
a Safety I/O
communication
error
--- All Safety I/O
com-munication
stopped because
ofa Safety I/O
communication
error
Cause
Saved in
nonvola-
tile
memory
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
See note Transmission
1. timeout
Yes A safety I/O
(See note connection timed
2.) out, interrupting
the relevant I/O
connection.
Yes A safety I/O
(See note connection timed
2.) out, interrupting
the relevant I/O
connection.
Section 10-3
Corrective actions
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.
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 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.
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