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Fan Networking
If networking multiple fans to run using a single control
source, the dipswitch settings on each fan's VFD circuit
board will need to be adjusted using the following
instructions.
First Fan
1. Determine the first fan in the network daisy-chain
by identifying the fan that is connected directly to
the control source.
2. Remove the front VFD cover from the first fan in the
network using a phillips screwdriver.
3. Dipswitch 2 is used to set parameters that improve
network function. Verify that each of the switches
on dipswitch 2 are set as follows:
Position 1 – Off
Position 2 – On
Position 3 – On
4. Dipswitch 3 is used to set unique Modbus
addresses for each fan in the daisy-chain. Adjust
positions 1-5 on dipswitch 3 to set the desired
Modbus address. A table with all possible Modbus
addresses is shown to the right.
IMPORTANT: Positions 6 – 8 are used to set parameters
needed for fan operation and should not be adjusted.
5. Refer to instruction manual provided with HVLS
control to determine if additional networking
modifications are required. Follow instructions to
complete necessary modifications.
6. Reinstall the front VFD cover.
All Remaining Fans
1. Remove the front VFD cover using a phillips
screwdriver.
2. Set dipswitch 2 as shown below. Dipswitch 2 is
used to set parameters that improve network
function and will need to be adjusted for all fans in
the network except for the first fan.
Position 1 – Off
Position 2 – Off
Position 3 – Off
®
3. Adjust positions 1 – 5 on dipswitch 3 so that each
IMPORTANT: Positions 6 – 8 are used to set parameters
needed for fan operation and should not be adjusted.
DIPSWITCH 2
NOTE: It is good practice to use successive Modbus
addresses for networked fans, but this is not necessary
for proper functioning of the network.
DIPSWITCH 3
4. Refer to instruction manual provided with HVLS
5. Reinstall the front VFD cover.
Modbus
Address
successive fan has a unique Modbus address. A
table with all possible Modbus addresses is shown
below.
control to determine if additional networking
modifications are required. Follow instructions to
complete necessary modifications.
Modbus Address Settings - Dipswitch 3
Position
Position
Position
1
2
3
2
On
Off
Off
3
Off
On
Off
4
On
On
Off
5
Off
Off
On
6
On
Off
On
7
Off
On
On
8
On
On
On
9
Off
Off
Off
10
On
Off
Off
11
Off
On
Off
12
On
On
Off
13
Off
Off
On
14
On
Off
On
15
Off
On
On
16
On
On
On
17
Off
Off
Off
18
On
Off
Off
19
Off
On
Off
20
On
On
Off
21
Off
Off
On
22
On
Off
On
23
Off
On
On
24
On
On
On
25
Off
Off
Off
26
On
Off
Off
27
Off
On
Off
28
On
On
Off
29
Off
Off
On
High Volume, Low Speed Ceiling Fans
Position
Position
Position
4
5
6, 7, 8
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Do Not
Modify
On
Off
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
On
On
On
On
On
On
On
On
On
On
11
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