Group 42: External / Trimming Pid - ABB ACS550-01 User Manual

ACS550 User's Manual

Group 42: External / Trimming PID

This group defines the parameters used for the External / Trimming PID.
The operation of parameters 4201
parameters 4001
parameters for a process PID.
Code Description
4228 ACTIVATE
Defines the source for enabling the external PID function.
• Requires 4230
TRIM MODE
0 = – Disables external PID control.
NOT SEL
1 = 1 – Defines digital input
DI
• Activating the digital input enables external PID control.
• De-activating the digital input disables external PID control.
2...6 = 2... 6 – Defines digital input
DI DI
• See 1 above.
DI
7 = – Defines the start command as the control for enabling external PID control.
DRIVE RUN
• Activating the start command (drive is running) enables external PID control.
8 = – Defines the power-on as the control for enabling external PID control.
ON
• Activating power to the drive enables external PID control.
-1 = 1( ) – Defines an inverted digital input
DI INV
• Activating the digital input disables external PID control.
• De-activating the digital input enables external PID control.
-2...-6 = 2( )...
DI INV DI
• See 1( ) above.
DI INV
4229 OFFSET
Defines the offset for the PID output.
• When PID is activated, output starts from this value.
• When PID is deactivated, output resets to this value.
• Parameter is not active when 4230
4230 TRIM MODE
Selects the type of trim, if any. Using the trim it is possible to combine a corrective factor to the drive reference.
0 = – Disables the trim function.
NOT SEL
1 = – Adds a trim factor that is proportional to the rpm/Hz reference (external % - reference (
PROPORTIONAL
See parameter 1106).
2 = – Adds a trim factor based on the control loop's maximum limit.
DIRECT
4231 TRIM SCALE
Defines the multiplier (as a percent, plus or minus) used in the trim mode.
4021 (4011
...
= 0 .
NOT SEL
1 as the control for enabling external PID control.
DI
2... 6 as the control for enabling external PID control.
DI DI
6( ) – Defines digital input
INV
TRIM MODE
4221 is analogous with set 1 (and set 2)
...
4021). The parameter groups 40 and 41 define the
...
1 as the control for enabling external PID control.
DI
2... 6 as the control for enabling external PID control.
DI DI
not = 0 (trim mode is active).
99
2).
REF
Start-Up