-21-
No.EX※※-OMS0027
LED Display
LED display shows the power supply and communication status.
Display Content
ST(M) Displays the diagnosis status of the unit.
PWR
Displays the status of the power supply voltage for control
and input.
PWR(V) Displays the status of the power supply voltage for output.
MS Displays the module status.
NS Displays the network status.
Display Content
L/A IN Displays the communication status of the BUS IN side.
L/A OUT Displays the communication status of the BUS OUT side.
•ST(M)-LED
LED display Content
OFF
The power supply for control and input is OFF.
Green ON
Normal operation.
Green flashing
Diagnostic error of I/O unit is detected.
Red flashing
Either of the following diagnostic error is detected.
(When diagnostic parameter is enabled)
•Valve ON/OFF counter has exceeded the set value.
•Valve is short circuited or disconnected.
Red/green flashing alternately
Detect a communication error between SI unit and I/O unit.
Red ON
SI unit has failed.
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