Varec 2920 Installation And Operation Manual page 97

5 Display and Configuration Interface
Command
TW Bus Status This parameter is both an indicator of the current L&J
TankWay bus state and a control for changing or testing
the bus state. Selections are:
Bus Connected — Indicates the transmitter is currently
connected to the L&J TankWay and the field relay is
closed.
If the bus is connected, the command to Isolated can be
issued to disconnect the transmitter and open the field
relay.
Bus Isolated — Indicates the transmitter is currently
disconnected from the L&J TankWay bus and the field
relay is open.
If the bus is isolated, the command to Connected can be
issued to connect the transmitter back to the bus and
close the field relay.
Bus Test — This command initiates a test of the L&J
TankWay interface hardware. The transmitter
disconnects from the bus and tests the transceiver
hardware. If the hardware test is successful, the
transmitter reconnects to the L&J TankWay bus and the
status displays Connected. If the hardware test fails, the
transmitter remains disconnected from the bus and the
status displays Isolated.
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