SMC Networks EXW1-BPNAC1 Operation Manual page 65

LED status
Problem LED
Colour
No. name
of LED
W-MS Red
7
W-MS Red
Possible causes
ON/Flashing
The following Remote
diagnostic information is
detected.
(1) US1 (for control) power
supply voltage level is
abnormal
(2) US2 (for output) power
supply voltage level is
abnormal
(3) Excessive I/O setting for
inputs/outputs
(4) Error in communication
between units
(4)-1 Abnormal input unit
(4)-2 Abnormal output unit
(4)-3 Abnormal input /
output unit
Flashing
(5) EX600 I/O unit detects
diagnostic information
(5)-1 Short-circuited US1
(for control / input)
power supply voltage
(5)-2 Short-circuited US2
(for output) power
supply voltage
(5)-3 Short-circuited output
load
(5)-4 User set upper or
lower limit of the
analog unit exceeded
(5)-5 I/O range upper or
lower limit of the
analog unit exceeded
(6) Valve diagnostic
information detected
(6)-1 Valve short-circuited
(6)-2 Valve with broken
line
ON
Remote malfunction
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Investigation and countermeasures
After checking the error contents while
referring to the system diagnostic information
and LED indication, refer to the following
countermeasures.
As this LED indicates the system status of the
Remote, the following diagnoses can be
"
conducted only when the Diagnostic
allocation" is set to "Advanced".
(1) Supply 24 VDC +/-10% to the US1 (for
control / input) power source of the Remote.
(2) Supply 24 VDC +/-10% to the US2 (for
output) power source of the Remote
.
(3) The number of the station's input / output
points has exceeded the set value.
Check the occupied bytes of the EX600
I/O unit and valve manifold connected to
the Remote.
(4) Confirm that there is no loose connection
between the units and connect them
correctly.
(5) Check the part where the error occurs by
checking the LED indication and
information of the system diagnostics, and
refer to the operation manual for the digital
and analog units.
(6) Replace the valve and check the operation.
Replace the Remote If the error persists after
replacement, stop using the equipment and
contact your SMC sales representative.
Doc.DOC1069999