Parameter listing and descriptions
291
ACH550-01 User's Manual
Group 42: EXT / TRIM PID
This group defines the parameters used for the External PID
controller (PID2) of the ACH550.
The operation of parameters 4201…4221 is analogous with
Process PID controller (PID1) set 1 parameters 4001…4021.
Code Description
Range
4201
…
4221
See 4001…4021.
4228
ACTIVATE
-6…12
Defines the source for enabling the external PID function.
• Requires 4230
TRIM
MODE
= 0 (
NOT
SEL
).
0 =
NOT
SEL
– Disables external PID control.
1 =
DI
1 – Defines digital input
DI
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…6 =
DI
2…
DI
6 – Defines digital input
DI
2…
DI
6 as the control for
enabling external PID control.
• See
DI
1 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
Group 36: TIMED FUNCTIONS
.
-1 =
DI
1(
INV
) – Defines an inverted digital input
DI
1 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…-6 =
DI
2(
INV
)…
DI
6(
INV
) – Defines an inverted digital input
DI
2…
DI
6
as the control for enabling external PID control.
• See
DI
1(
INV
) above.
4229
OFFSET
0.0…100.0%
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 4230
TRIM
MODE
<> 0 (i.e. trim mode is
active).
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