Pid Controller - ABB ACS 400 User Manual

EXT REF
SELECT
1106
Control
Terminals
Analogue
inputs
Digital
KEYPAD
inputs
DI1-DI5
AI1
AI2
ACTUAL
INPUT SEL
4007
Keypad
Ref
Loc/Rem
KEYPAD
Figure 71 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 PFC control macro is selected.
Key features of the PID controller are:
• PID sleep function to stop the regulation when the output of PID controller falls below preset
limit; recovery when the process actual value falls below 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.
ACS 400 User's Manual
1
2 EXT REF
SELECT
1103
AI1
KEYPAD
AI1
Remote
PID
Local
+
1
ACT
PFC
2
AI1
ACT
AI2
1
2 ACTUAL
ACTUAL
VAL SEL
INPUT SEL
4006
4008
Start/Stop, Direction
NOT SEL
DI1
NOT SEL
DI1...5
KEYPAD
2
1
EXT
EXT
COMMANDS
COMMANDS
1001 1002
1/ 2
CONST
EXT EXT
SPEED SEL
SEL
1201
1102
NOT SEL
1
EXT
2
EXT
Const.
speeds
2 (%)
REF
1 (Hz)
REF
Local
1
EXT
Remote
2
EXT
KEYPAD
REF SEL
1101
Remote
Local
REQUEST
FORWARD
REVERSE
RUN ENABLE
DIRECTION
1601
1003
Min freq
Max freq
Crit. sp.
Acc/Dec
Start/Stop
Direction
DI4
147