ACS 400 User’s Manual
159
Figure 65 The control signal connections of the Pump and Fan Control (PFC) macro.
PID Controller
The ACS 400 has an internal PID controller which is in use when the PFC Control Macro is
selected. Key features of the PID controller are:
•
PID sleep function to stop regulation when the output of the PID controller falls below preset
limit; recovery when the process actual value falls below the preset limit.
•
Programmable sleep and wake-up delays. Sleep mode can also be activated through a digital
input.
•
Two PID parameter sets, selectable through a digital input.
•
PID controller parameters are in groups 40 and 41.
Control
Terminals
Analogue
inputs
EXT
REF
2
SELECT
1106
EXT
REF
1
SELECT
1103
EXT
1/
EXT
2
SEL
1102
CONST
SPEED
SEL
1201
AI1
EXT
1
EXT
2
KEYPAD
AI1
Remote
KEYPAD
Local
Remote
Local
Const.
speeds
Min freq
Max freq
Crit. sp.
Acc/Dec
KEYPAD
REF
SEL
1101
Digital
inputs
DI1-DI5
Keypad
Ref
Loc/Rem
REF
2 (%)
REF
1 (Hz)
Start/Stop, Direction
NOT
SEL
DI1
KEYPAD
KEYPAD
EXT
1
EXT
2
Local
Remote
REQUEST
FORWARD
REVERSE
Start/Stop
Direction
RUN
ENABLE
DIRECTION
EXT
2
COMMANDS
1002
EXT
1
COMMANDS
1001
NOT
SEL
1003
1601
AI1
AI2
AI1
AI2
ACT
2
ACT
1
ACTUAL
VAL
SEL
4006
ACTUAL
1
INPUT
SEL
4007
ACTUAL
2
INPUT
SEL
4008
PID
DI1...5
NOT
SEL
DI4
PFC
+
http://nicontrols.com
Summary of Contents for ACS 400
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