Modbus Gateway(Pro)
9
4.3.4 The Eighth Switch of Function DIP Switch – Setting of
CAN2 Bus Matched Resistance
Notice! Master outdoor unit or gateway of the system which is at the end of
CAN2 bus must be set as with the matched resistance, otherwise communication
will be abnormal!
※CAN2 bus: Detailed meaning please refer to topology introduction.
The eighth switch of function DIP switch is used for setting the CAN2 bus
matched resistance of this gateway.
If the gateway is at the end of CAN2 bus, the gateway shall be set as with the
matched resistance, which means set the eighth DIP switch to 0;
If the gateway is not at the end of CAN2 bus, the gateway shall be set as
without the matched resistance, which means set the eighth DIP switch to 1.
1 65432 7 8
0
1
Function
1
0
is the position of DIP
Without matched resistance
With matched resistance
8
8
„
Master
control unit
of ODU
system 1
Set as with
matched
resistance
Set as
without
matched
resistance
Master
control unit
of ODU
system 2
Master
control unit
of ODU
system n
CAN2 bus
Set as
without
matched
resistance
Set as with
matched
resistance
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