Emerson MultiFlex RTU, Installation And Operation Manual

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Status LED Board Status LEDs • 17
5 Board Status LEDs
When a MultiFlex board is powered up, you will
be able to determine the operating status of the
board by observing its status LEDs. Figure 5-1
shows the location of the MultiFlex’s status
LEDs.
5.1. Status LED
The Status LED blinks GREEN once per second
to show that the board is powered and
operational. If this light is dark, the board has
likely lost power.
5.2. Tx and Rx LEDs
The Tx and Rx LEDs indicate when the
MultiFlex is sending or receiving messages on
the RS485 network.
The Tx LED blinks once every time the
MultiFlex sends a response to the Einstein or
REFLECS. The Rx LED blinks once when the
MultiFlex receives a message.
If the MultiFlex is connected to the network and
set up to communicate with the controller, you
should see these lights blinking regularly. If they
do not, there may be a problem with the
network.
5.3. The Code A LED
The Code A LED on the MultiFlex RTU
indicates activity on the Hand-Held Terminal
port. When this LED is not blinking, it means no
HHT is plugged into the board. When it is
blinking rapidly, it means an HHT is present.
The Code A LED will also glow without
blinking for 1/2 second every time a screen
update occurs on the HHT.
Figure 5-1 - MultiFlex Status LED Locations