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38
Pump Alternation
This macro configures for pump alternation applications, usually used in booster
stations. To adjust/maintain pressure in the network, the speed of the one pump
changes according to a signal received from a pressure transducer. When the
variable speed pump reaches a maximum speed limit, auxiliary pumps start as
needed. When using process PID, see "General Considerations" on page 30. To use
more than one (the default) Auxiliary pump, see parameter group 81.
9902
1105
1201
1401
1503
1508
1509
1601
1608
Start-Up
X1
Signal cable shield (screen)
1
SCR
External reference 0(2)...10 V or 0(4)...20 mA
2
AI1
+
Analog input circuit common
3
AGND
Reference voltage 10 VDC
4
10V
PID feedback: 0(2)...10 V or 0(4)...20 mA
5
AI2
+
Analog input circuit common
6
AGND
Output frequency: 0(4)...20 mA
7
AO1
mA
8
AO2
Output current: 0(4)...20 mA
mA
9
AGND
Analog output circuit common
Auxiliary voltage output +24 VDC
10 24V
Common for DI return signals.
11 GND
Digital input common for all
12 DCOM1
Start/Stop: Activate to start drive
13 DI1
Run permissive: Deactivate to stop drive (P 1601)
14 DI2
Not configured
15 DI3
PFA interlock 1: Deactivate to stop drive (P 1608)
16 DI4
PFA interlock 2: Deactivate to stop drive (P 1609)
17 DI5
Not configured
18 DI6
19 RO1C
20 RO1A
21 RO1B
22 RO2C
23 RO2A
24 RO2B
25 RO3C
26 RO3A
27 RO3B
Parameters Changed Relative to HVAC Default
Parameter
7 (
APPLIC MACRO
1
62Hz/1860rpm
REF
MAX
0 (
CONST SPEED SEL
1
31 (
RELAY OUTPUT
1
62
AO
CONTENT MAX
2
0.0%
AO
CONTENT MIN
2
100.0%
AO
CONTENT MAX
2 (
RUN ENABLE
1
0 (
START ENABLE
Relay output 1 (P 1401)
Default operation: PFA (starts lag pump)
Relay output 2 (P 1402)
Default operation: Running =>22 connected to 24
Relay output 3 (P 1403)
Default operation: Fault (-1) =>25 connected to 27
(Fault => 25 connected to 26)
Value
)
1609
PUMPALTERN
2208
)
2202
NOT SEL
)
2203
PFA
3207
HZ
4101
4102
2)
8123
DI
)
NOT SEL
AYK550 User's Manual
J1
Jumper Settings
AI1: 0(2)
AI2: 0(4)
Parameter
2
5 (
5)
START ENABLE
DI
62
EM DEC TIME
HZ
1
5.0 s
ACCELER TIME
1
5.0 s
DECELER TIME
3
0103 (
SUPERV
PARAM
OUTPUT FREQ
1.0
GAIN
60.0 s
INTEGRATION TIME
1 (
PFA ENABLE
ACTIVE
...
10 V
...
20 mA
Value
)
)
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