The OneWire CAN cables automatically assign the GR-i3F receivers. OneWire does not automatically assign GR-i3 receivers. You must configure those separately as MAIN and AUX in the MC-X Machine Control Gateway.
Topcon configures and ships all GR-i3F receivers from the factory as MAIN. The yellow OneWire cable assigns the GR-i3F as MAIN (Node ID 116). The black OneWire cable assigns the GRi3F as AUX (Node ID 120).
Note: If you try to use a OneWire cable on a GR-i3F that was manually assigned as an AUX, the antenna node ID can become a Node:124. This can make the system unstable. You must configure the GR-i3F as MAIN for the system to operate correctly.
For automatic pole detection, it is necessary to configure both GR-i3F receivers as MAIN. Pole detection must be enabled for both the MAIN and AUX receivers: In MCWEB, go to .
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