235
Indicator/Display Status and Corrective Actions for Errors Section 12-3
Abort Errors
Nonfatal Errors
Indicators/display Error history
MS NS Seven-
segment
display
Name Saved in
nonvolatile
memory
Cause Corrective actions
Flashing
red
Flashing
green or
Lit green
E8Ù
Node
address of
error
Switch
Setting Mis-
match
Yes The node address and
baud rate were changed
after the normal comple-
tion of configuration
download.
• Configure the switches prop-
erly.
• Reset the configuration data.
Indicators/display Error history Cause Corrective actions
NS Seven-
segment
display
I/O Name Saved in
nonvola-
tile
memory
Lit red
F0Ù
Node
address of
error
--- Duplicate MAC ID See note
1.
Node address
duplication
(Same node
address set for
more than one
node.)
Check the node addresses of
other nodes.
Switch ON the power supply
again after reconfiguring with-
out duplication.
Lit red
F1Ù
Node
address of
error
--- Bus OFF See note
1.
Bus Off
(Communica-
tions cut off
because of fre-
quent data
errors.)
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.
Flashing
red
L9Ù
Master node
address
--- Standard I/O
Connection
Timeout
See note
1.
Standard I/O
connection
timeout
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.
Flashing
red
dAÙ
Destination
slave node
address
--- Safety I/O
Connection
Timeout
See note
1.
Safety I/O
connection
timeout
Flashing
red
d5Ù
Destination
slave node
address
--- Nonexistent Slave
Device
See note
1.
No slave
Flashing
red
d6Ù
Destination
slave node
address
--- Safety I/O
Connection
Establishment Fail-
ure
See note
1.
Safety I/O con-
nection establish-
ment error
Check the slave device.
• Make sure it its configured.
• Make sure it is in a normal
operational state.
Flashing
red
d6Ù
Destination
slave node
address
--- Invalid Slave
Device
See note
1.
Invalid slave
device (verifica-
tion error)
Verify the slave device (select
Device - Parameters - Com-
pare) and connect a suitable
slave device.
OFF
E0Ù
Node
address of
error
--- Network PS
Voltage Low
See note
1.
Network power
supply voltage
low error
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.
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