ABB ACS320 - Page 244

244 Actual signals and parameters
4228
ACTIVATE
-5…12 - 1
Defines the source for enabling the external PID function.
• Requires parameter 4230 TRIM MODE = 0 NOT SEL.
0 = NOT SEL – Disables external PID control.
1 = DI1 – Defines digital input 1 as the control for enabling external PID control.
• Activating the digital input enables external PID control.
• De-activating the digital input disables external PID control.
2…5 = DI2…DI5 – Defines digital input DI2…DI5 as the control for enabling external
PID control.
• See DI1 above.
7 = DRIVE RUN – Defines the start command as the control for enabling external PID
control.
• Activating the start command (drive is running) enables external PID control.
8 = ON – Defines the power-on as the control for enabling external PID control.
• Activating power to the drive enables external PID control.
9…12 = TIMER 1…4 – Defines the Timer as the control for enabling external PID
control (Timer active enables external PID control).
• See parameter Group 36: Timed functions.
-1 = DI1(INV) – Defines an inverted digital input DI1 as the control for enabling external
PID control.
• Activating the digital input disables external PID control.
• De-activating the digital input enables external PID control.
-2…-5 = DI2(INV)…DI5(INV) – Defines an inverted digital input DI2…DI5 as the control
for enabling external PID control.
• See DI1(INV) above.
4229
OFFSET
0.0 … 100.0% 0.1% 0.0%
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 parameter 4230 TRIM MODE not = 0 (trim mode is not
active).
4230
TRIM MODE
0…2 1 0
Selects the type of trim, if any. Using the trim it is possible to combine a corrective
factor to the drive reference.
0 = NOT SEL – Disables the trim function.
1 = PROPORTIONAL – Adds a trim factor that is proportional to the rpm/Hz reference.
2 = DIRECT – Adds a trim factor based on the control loop’s maximum limit.
4231
TRIM SCALE
-100.0 … 100.0% 0.1% 0.0%
Defines the multiplier (as a percent, plus or minus) used in the trim mode.
Group 42: Ext / Trim PID
Code Description Range Resolution Default S