What is the purpose of Heartbeat / serial communications LED in DM6000H series meter ?

The heartbeat / serial communications LED blinks to indicate the meter’s operation and serial Modbus communications status.

The LED blinks at a slow, steady rate to indicate the meter is operational. The LED flashes at a variable, faster rate when the meter is communicating over a Modbus serial communications port.

You cannot configure this LED for other purposes.

NOTE: A heartbeat LED that remains lit and does not blink (or flash) can indicate a hardware problem.

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