ABB ACS550 Series, User Manual

Page: 159 / 310

ACS550 User’s Manual 159
Parameters
Group 40: PROCESS PID SET 1
This group defines a set of parameters used with the Process PID (PID1) controller.
Typically only parameters in this group are needed.
PID controller
–
Basic set-up
In PID control mode, the drive compares a reference signal (setpoint) to an actual
signal (feedback) and automatically adjusts the speed of the drive to match the two
signals. The difference between the two signals is the error value.
Typically PID control mode is used, when the speed of a motor needs to be
controlled based on pressure, flow or temperature. In most cases
–
when there is
only 1 transducer signal wired to the ACS550
–
only parameter group 40 is needed.
The following is a schematic of setpoint/feedback signal flow using parameter group
40.
Note: In order to activate and use the PID controller, parameter 1106 must be set to
value 19.
Panel REF1
P1101
REF1
REF2
P1106
Panel REF 2
P1102
EXT 1
EXT 2
P1104
P1105
P1103
Panel REF 1
DI
AI
Comm REF 1
P1107
P1108
G12
Const
Speed
PANEL
G40
PID1
Panel REF2
AI
Current
Torque
Power
AI
Current
Torque
Power
PID Setpoint
PID Act Value
P4016
P4015
P4014
P4017
500%
-500%
G40
PID1
AI
Current
Torque
Power
AI
Current
Torque
Power
PID Act Value
P4016
P4015
P4014
P4017
P1106
Panel REF 2
DI
AI
Comm REF 2
G12
Const
Speed
Panel REF2
Internal
Comm
AI2
AI1
PID Setpoint
P4010
P4012
P4013
PID1 Out
19
LOC/REM
selection
LOC
REM
0…17,
20…21
P1106
19
0…17,
20…21