SMC Networks EX500 - Manual (Page 19)

EX500 Serial System EX## - OME0008
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4 -3. LED display
When the Input Unit Manifold is not connected, the respective COM LED of the GW Unit will not light up.
To monitor the status of COM port, it is necessary to use a Terminal Plug.
The COM LED will light up when a Terminal Plug is used. ( Refer to section 3 -6 -4 )
4 -4. Operation setting
Turn the power supply OFF when setting switches.
Open the station switch protection cover and set the dip switch with a flat blade screw driver.
SW1 SW2 SW3
1 2 3 4
ON
1 2 3 4 5 6 7 8
ON
COM A COM B COM C COM D
GATEWAY UNIT
EX500 SERIES
BUS
ERR
COM
SOL
RUN
Display Content
RUN
Source ON : Lights
Source OFF : Lights off
SOL
Solenoid valve source voltage is normal :Lights
Voltage lowered to 20V or less :Lights off
COM
RIO communication is normal : Lights
RIO communication is abnormal : Lights off
ERR
RIO communication is abnormal : Lights
RIO communication is normal : Lights off
COM A
Communication port A is receiving data : Lights
Communication port A has no data : Lights off
COM B
Communication port B is receiving data : Lights
Communication port B has no data : Lights off
COM C
Communication port C is receiving data : Lights
Communication port C has no data : Lights off
COM D
Communication port D is receiving data : Lights
Communication port D has no data : Lights off
！ ！ ！ ！ CAUTION