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7.7
READ / WRITE VARIABLES
Figure 20 describes the “Read and Write” type variables for the first MODBUS fan (Fan 1) in an installation. Take note that
each MODBUS fan has 30 registers assigned on the EC-Fan Gateway device.
Please apply the formula found under
Register Number Fan (X)
to determine the appropriate register number for the
different variables that represent Fan2,3 … 31. For example, if you were to change the “Ramp Up” time on Fan 2 then you
will be writing a value at register 43 (30(2-1)+13 = 43). Subsequently, the “Ramp Up” time for Fan 3 is assigned to register
73.
Take note that if the address is changed digitally via the building management system, this address change will also have
to be implemented on the EC-Fan Gateway device.
Once the above steps are completed your EC-FAN GATEWAY has been successfully set up.
If you have further questions please contact your ebm-papst representative or your nearest ebm-papst office.
Register Number Fan 1 Register Number Fan (X) Register Type Comments
Fan Address
1
Write Values
Speed Input
5
Write Values
Ramp Up
13
Write Values
Ramp Down
14
Write Values
(30(x-1)+ Register
Number Fan 1)
Take note all
variables are at a
Factor of 0.1
Maximum Speed
12
Read Only
Actual Speed
19
Read Only
DC Link Voltage
21
Read Only
DC Link Current
22
Read Only
Input Power
23
Table 1 Read and Write variale registers
