Xylem ADAQCPC Modbus Aquavar CPC - Manual (Page 7)

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For example, using the standard 300 PSI transducer supplied with the Aquavar CPC:
1. Parameter 1502 (Transducer Max) should be set to 300 PSI.
2. Parameter 1503 (Transducer Min) should be set to 0 PSI.
3. Setting to 60 PSI…
a. 60 PSI / 300 PSI = .2 or 20%
b. Write ‘2000’ to Holding Register 40003
4. Setting to 80 PSI…
a. 80 PSI / 300 PSI = ~.2667 or 26.67%
b. Write ’2667’ to Holding Register 40003
Speed Control through Modbus Interface
1. Set parameter 1102 (Applic Macro) to: [5] Speed Cntrl
2. Configure and Setup Modbus Serial Communications
3. Set parameter 1601 to [0] Setp1
4. Set parameter 1602 to [2] Fieldbus
5. Write a value between ‘10000’ and ‘0’ [100.00% to 0% of Maximum Freq (1401)] to Holding Register 40002.
Note: There is an implied decimal point that is not written between the second (from the right) and third
digit. Thus, 10000 = 100.00%.
For example, using a Maximum Freq of 60 Hz:
1. Parameter 1401 (Maximum Freq) should be set to 60Hz.
2. Parameter 1601 (SP1 / SP2 Select) should be set to 0psi.
3. Parameter 1602 (Set Point 1 Select) should be set to [2] Fieldbus
4. Setting to 60 Hz (Full Speed)…
a. 60 Hz / 60 Hz = 1 or 100%
b. Write ‘10000’ to Holding Register 40002.
Note: Writing to parameter 1403 will have no effect.
5. Setting to 30 Hz (Half Speed)…
a. 30 Hz / 60 Hz = .5 or 50%
b. Write ‘5000’ to Holding Register 40002.
Note: Writing to parameter 1403 will have no effect.
REMOTE SETTING OF SET POINT 1