16
LED Indicator and Function
The following table shows a list of LED names and functions.
Name
Display color
Function
Status
RUN LED
Red
Indicate the operating status of this unit.
ON: In normal operation
OFF: Power off or hardware trouble
*1
MASTER LED
Red
Indicate the Master station or Slave station of MODBUS
RTU communication.
ON: Master station
OFF: Slave station
CNT. LED
Red
Indicate the control execution status.
ON: In control (RUN)
OFF: Off-control (STOP)
ERR. LED
Red
Indicate the error status.
ON: Error occurring
*1
OFF: No error
LAN LED
Red
Indicate the LAN communication status.
ON: Sending/receiving data
OFF: Off-communication
BAT. LED
Red
Indicate the remaining lithium battery level.
ON: Low battery voltage
*2
OFF: Normal battery voltage
Y1 LED
Red
Indicate the ON/OFF status of contact output Y1.
ON: Contact is ON.
OFF: Contact is OFF.
Y2 LED
Red
Indicate the ON/OFF status of contact output Y2.
ON: Contact is ON.
OFF: Contact is OFF.
Y3 LED
Red
Indicate the ON/OFF status of contact output Y3.
ON: Contact is ON.
OFF: Contact is OFF.
AY (A) LED
Red
Indicate the analog output status.
(Current output: 4 to 20 mA)
*When the analog output type setting is voltage 0 to 5 V,
the status is OFF.
ON: In analog signal output
OFF: Analog signal output stopped
AY (V) LED
Red
Indicate the analog output status.
(Voltage output: 0 to 5 V)
*When the analog output type setting is current 4 to 20 mA,
the status is OFF.
ON: In analog signal output
OFF: Analog signal output stopped
Note1: For details, refer to
Note2: When the battery voltage is low, if the power supply is turned off, the present time data will be deleted. If the BAT. LED
lights up, replace the lithium battery.
Supplement
The action in each control operating status is as follows:
●In control (RUN)
The control is executed according to the settings written into the parent terminal of control unit.
●Off-control (STOP)
The present output state is retained. No control is executed according to the settings written into the
parent terminal of control unit.
