Pid Controller - ABB ACS 400 User Manual

EXT REF
SELECT
1106
Control
Terminals
Analogue
inputs
Digital
KEYPAD
inputs
DI1-DI5
AI1
AI2
Keypad
Ref
Loc/Rem
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.
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
ACTUAL
INPUT SEL
4007
ACTUAL
2
ACTUAL
VAL SEL
INPUT SEL
4006
4008
Start/Stop, Direction
NOT SEL
DI1
KEYPAD
NOT SEL
DI1...5
KEYPAD
2
1
EXT
EXT
COMMANDS
COMMANDS
1001 1002
http://nicontrols.com
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
DIRECTION RUN ENABLE
1003 1601
Min freq
Max freq
Crit. sp.
Acc/Dec
Start/Stop
Direction
DI4
159