Application macros 89
PFA control macro
This macro provides parameter settings for pump and fan alternation (PFA)
applications. To enable the macro, set the value of parameter 9902 APPLIC MACRO
to 7 (PUMP ALTERNA).
Note: Parameter 2108 START INHIBIT must remain in the default setting 0 (OFF).
Parameters changed relative to HVAC default
Parameter Value
Parameter Value
9902 APPLIC MACRO 7 (PUMP ALTERNA) 2203 DECELER TIME 1 10.0 s
1201 CONST SPEED SEL 0 (NOT SEL)
8109 START FREQ 1 58.0 Hz
1401 RELAY OUTPUT 1 31 (PFA)
8110 START FREQ 2 58.0 Hz
1608 START ENABLE 1 0 (NOT SEL)
8111 START FREQ 3 58.0 Hz
2101 START FUNCTION 1 (AUTO)
8120 INTERLOCKS
2202 ACCELER TIME 1 10.0 s
8123 PFA ENABLE 1 (ACTIVE)
X1A
1 SCR Signal cable shield (screen)
2AI1 Ext. ref. 1 (Hand) / Ext. ref. 2 (PID/PFC): 0…10 V
3 GND Analog input circuit common
4 +10V Reference voltage: +10 V DC, max. 10 mA
5AI2 Process actual value: 4…20 mA
6 GND Analog input circuit common
7AO Output frequency value: 0…20 mA
8 GND Analog output circuit common
9 +24V Auxiliary voltage output: +24 V DC, max. 200 mA
10 GND Auxiliary voltage output common
11 DCOM Digital input common
12 DI1 Stop (0) / Start (1) (Hand)
13 DI2 Hand (0) / PID/PFC (1) control selection
14 DI3 Interlock: Deactivation always stops the drive
15 DI4 Interlock: Deactivation stops constant speed motor
16 DI5 Stop (0) / Start (1) (PID/PFC)
X1B
17 ROCOM Relay output 1
PFC
18 RONC
19 RONO
20 DOSRC Digital output, max. 100 mA
No fault [Fault (-1)]
21 DOOUT
22 DOGND
1…10 kohm
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