B&B Electronics MESR9xx LED Indicators, E1/E2 Ethernet Link LED, Ready LED, Serial Port LEDs

2. Hardware Vlinx MESR9xx Modbus Gateway

LED Indicators

MESR9xx Modbus Gateways have three types of LED indicators: Ethernet Link LEDs, a Ready LED and Serial Port LEDs.

Figure 3. 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

MESR901-x Modbus Gateways feature one serial port. MESR902D, and MESR902T-x Modbus Gateways feature 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.

Figure 4. Serial Port LEDs on 1 and 2 Serial Port Modbus Gateways

Page 7	Manual Documentation Number MESR9xx-4508m
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