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AYK550 User's Manual
Cooling Tower Fan
This macro configures for cooling tower fan applications where the fan speed is
controlled according to the signals received from a transducer. When using direct
speed reference in AUTO mode or process PID, see "General Considerations" on
page 30.
mA
9902
1401
1601
1609
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
4
10V
Reference voltage 10 VDC
PID feedback: 0(2)...10 V or 0(4)...20 mA
5
AI2
+
6
AGND
Analog input circuit common
7
AO1
Output frequency: 0(4)...20 mA
mA
8
AO2
Output current: 0(4)...20 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
Constant (Preset) speed 1 (P 1202
15 DI3
Safety interlock 1: Deactivate to stop drive (P 1608)
16 DI4
Safety interlock 2: Deactivate to stop drive (P 1609)
17 DI5
Not configured
18 DI6
19 RO1C
Relay output 1 (P 1401)
Default operation: Ready =>19 connected to 21
20 RO1A
21 RO1B
22 RO2C
Relay output 2 (P 1402)
Default operation: Running =>22 connected to 24
23 RO2A
24 RO2B
25 RO3C
Relay output 3 (P 1403)
Default operation: Fault (-1) =>25 connected to 27
26 RO3A
27 RO3B
Parameters Changed Relative to HVAC Default
Parameter
4 (
APPLIC MACRO
CLNGTWRFAN
1
7 (
RELAY OUTPUT
STARTED
2 (
RUN ENABLE
DI
2
5 (
START ENABLE
DI
(Fault => 25 connected to 26)
Value
Parameter
)
3207
SUPERV
)
4101
GAIN
2)
4102
INTEGRATION TIME
5)
J1
Jumper Settings
AI1: 0(2)
AI2: 0(4)
1
)
Value
3
0103 (
PARAM
OUTPUT FREQ
1.0
60.0 s
35
...
10 V
...
20 mA
)
Start-Up
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