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LED INDICATORS
MESR9xx Modbus Gateways have three types of LED indicators: Ethernet Link LEDs,
Ready LED and Serial Port LEDs.
Ready Ethernet Port LEDs on 1 and 2 Ethernet Port Modbus Gateways
E1/E2 ETHERNET LINK LED
The Ethernet Link LED (E1 or E2) illuminates (green) if the Ethernet is connected.
When the LED is blinking, it indicates that there is data traffic on the Ethernet link.
E1 is used for all models to connect to the network. E2 is used on MESR92x models,
and is a pass-through Ethernet connector.
READY LED
The Ready LED (green) blinks if the system is operating correctly, once per second in
normal operating conditions, or three times per second in reset, configuration mode, or
when loading factory defaults. If the LED is off or steady, it indicates the system is not
operating correctly.
SERIAL PORT LEDS
Model MESR901 Modbus Gateway features one serial port. Model MESR902T Modbus
Gateway features two serial ports. Each serial port has an associated LED. Serial Port
LEDs blink (green) when data is being transmitted or received on the serial port. When
the LED is On, it indicates the serial port is open.
MESR9xx Modbus
Serial Port LEDs on 1 and 2 Serial Port Modbus Gateways
12
Gateways:
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