ACH550 User’s Manual
45
Internal Timer with Constant Speeds / PRV
This macro configures for applications such as a timed powered roof ventilator
(PRV) which alternates between two constant speeds (constant speed 1 and 2)
based on a built-in timer.
Momentarily activating digital input 3 (DI3) provides a boost function which operates
the motor. See group 36, Timer Functions, for more information on setting up timers.
Parameters Changed Relative to HVAC Default
Parameter
Value
Parameter
Value
9902
APPLIC
MACRO
9 (
INT
TIMER
CS
)
3416
SIGNAL
3
MIN
-200.0%
1002
EXT
2
COMMANDS
0 (
NOT
SEL
)
3417
SIGNAL
3
MAX
200.0%
1103
REF
1
SEL
0 (
KEYPAD
)
3419
OUTPUT
3
DSP
UNIT
4 (%)
1106
REF
3
SEL
2 (
AI
2)
3420
OUTPUT
3
MIN
-200.0%
1201
CONST
SPEED
SEL
15 (
TIMER
1)
3421
OUTPUT
3
MAX
200.0%
1301
MINIMUM
AI
1
0.0%
3622
BOOST
SEL
3 (
DI
3)
1401
RELAY
OUTPUT
1
7 (
STARTED
)
4001
GAIN
1.0
1601
RUN
ENABLE
2 (
DI
2)
4002
INTEGRATION
TIME
60.0 s
1609
START
ENABLE
2
5 (
DI
5)
4101
GAIN
1.0
3207
SUPERV
3
PARAM
0103 (
OUTPUT
FREQ
)
4102
INTEGRATION
TIME
60.0 s
3415
SIGNAL
3
PARAM
0105 (
TORQUE
)
4110
SETPOINT
SEL
1 (
AI
1)
1
SCR
2
AI1
3
AGND
4
10V
5
AI2
6
AGND
7
AO1
8
AO2
9
AGND
10 24V
11 GND
12 DCOM1
13 DI1
14 DI2
15 DI3
16 DI4
17 DI5
18 DI6
19 RO1C
20 RO1A
21 RO1B
22 RO2C
23 RO2A
24 RO2B
25 RO3C
26 RO3A
27 RO3B
X1
+
mA
mA
External reference
0(2)…10 V or 0(4)…20 mA
Reference voltage 10 VDC
Output frequency:
0(4)…20 mA
Timer enable:
Activate to start/stop drive from timer
Run permissive:
Deactivate to stop drive (P 1601)
Timer override:
Activate to start drive
Safety interlock 1:
Deactivate to stop drive (P 1608)
Safety interlock 2:
Deactivate to stop drive (P 1609)
Relay output 1 (P 1401)
Default operation:
Started
=>19 connected to 21
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
Output current:
0(4)…20 mA
Not configured
Analog input circuit common
Not configured
Analog output circuit common
Auxiliary voltage 24 VDC
Common for DI return signals.
Digital input common for all
Signal cable shield (screen)
Analog input circuit common
(Fault => 25 connected to 26)
J1
AI1: 0(2)
…
10 V
AI2: 0(4)
…
20 mA
ON
ON
Jumper Settings