Indicator/Display Status And Corrective Actions For Errors - Omron NE1A Series Manual

Indicator/Display Status and Corrective Actions for Errors

10-3 Indicator/Display Status and Corrective Actions for Errors
Critical Errors
Indicators/display
MS NS Seven-
segment
display
OFF
OFF OFF
Left: H
Right: ---
OFF
Lit red
Abort Errors
Indicators/display
MS NS
E8
Node
Flashing
Flashing
address of
green or
error
red
Lit green
Nonfatal Errors
Indicators/display
NS Seven-
segment
display
F0 Node
address of
Lit red
error
F1 Node
address of
Lit red
error
202
Error history
Name Saved in
nonvolatile
memory
None Not sup-
ported
System Fail- As much
ure saved as
possible.
Error history
Seven- Name
segment nonvolatile
display
Switch Yes
Setting Mis-
match
Error history
I/O Name
--- Duplicate MAC ID
--- Bus OFF
Cause
• Noise level higher than
expected.
• Critical hardware fault
• Before operation, the
safety output terminal or
test output terminal was
short-circuited to 24
VDC.
• Noise impact more than
expected.
• Critical hardware fault
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. (Comunications
cut off because
of frequent data
errors.)
Section 10-3
Corrective actions
Cycle the power supply and
check operation.
If the problem recurs, the NE1A-
series Controller may be faulty.
• Check whether there is any
influence from noise, and take
whatever corrective actions are
required.
• Check the external wiring for
power supply short-circuiting at
the output terminal.
• Check whether there is any
influence from noise, and take
whatever corrective actions are
required.
• Turn the power OFF and back
ON and check operation.
• If the problem recurs, the
NE1A-series Controller may be
faulty.
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.