ABB ACH550-UH User Manual page 164

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Group 42: EXT / TRIM PID
This group defines the parameters used for the second PID controller (PID2), which
is used for the External / Trimming PID.
The operation of parameters 4201
(PID1) parameters 4001...4021.
Code Description
4201 See 4001 ...4021
...
Note: The Default value for parameter 4201 is 1.0.
4221
The Default value for parameter 4202 is 60.0 s.
The Default value for parameter 4210 is 1 (
4228 ACTIVATE
Defines the source for enabling the external PID function.
• Requires 4230
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.
9...12 =
TIMED FUNC
function active enables external PID control).
• See
Group 36: TIMED
-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
control.
• 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 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 =
PROPORTIONAL
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.
Parameters
Group 42: Ext / Trim PID
Range
-6...12
= 0 ( ).
TRIM MODE NOT SEL
1 as the control for enabling external PID control.
DI
2...
DI DI
1...4 – Defines the Timed function as the control for enabling external PID control (Timed
FUNCTIONS.
6( ) – Defines an inverted digital input
DI INV
0.0...100.0%
= 0 (trim mode is not active).
TRIM MODE
0...2
– Adds a trim factor that is proportional to the rpm/Hz reference.
-100.0%...100.0%
4221 is analogous with Process PID set 1
...
Resolution
1).
AI
-
6 as the control for enabling external PID control.
1 as the control for enabling external PID control.
DI
2... 6 as the control for enabling external PID
DI DI
0.1%
1
0.1%
ACH550-UH User's Manual
Default
0 ( )
NOT SEL
0.0%
0 ( )
NOT SEL
0.0%
S