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3.3.3 Function DIP Switch-RS485 Bus Matched Resistance
Setting
Notice! If any fault is found during engineering debugging, please set the unit
or gateway under the front and end systems of 485 bus as with matched resistance,
otherwise, it cannot communicate normally. Detailed situation depends on the actual
project!
485 bus: specific meaning shall refer to the specification Internet topological
graph.
The No.7 dial-up button in function dial-up machine shall be used in the setting
in the matched resistance of 485 bus in this gateway.
When the gateway is at the top/end of 485 bus, the gateway shall be with the
matched resistance, then dial the No.7 function dial-up machine to 0;
When the gateway is not at the top/end of 485 bus, the gateway is not with the
matched resistance, then dial it to 1.
Setting of gateway network position and matched resistance：
Set to be with the
matched resistance
0
1
1
2
3
LSB
Is the location for dial-up button.
485 Bus
unit 1
4
5
6
7 8
HSB
unit 2
7
BACnet Gateway
......
unit n
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