ABB ACH550-UH-011A-6, User Manual

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220 Parameter listing and descriptions
ACH550-01 User's Manual
1706 OVERRIDE DIR -6…7
Selects the source of the override direction signal.
0 =
FORWARD
– Assigns forward as the override direction.
1 =
DI
1 – Defines digital input
DI
1 as the override direction signal.
• De-activating the digital input selects the forward direction.
• Activating the digital input selects the reverse direction.
2…6 =
DI
2…
DI
6 – Defines digital input
DI
2…
DI
6 as the override direction
signal.
• See
DI
1 above.
7 =
REVERSE
– Assigns reverse as the override direction.
-1 =
DI
1(
INV
) – Defines an inverted digital input
DI
1 as the override
direction signal.
• Activating the digital input selects the forward direction.
• De-activating the digital input selects the reverse direction.
-2…-6 =
DI
2(
INV
)…
DI
6(
INV
) – Defines an inverted digital input
DI
2…
DI
6
as the override direction signal.
• See
DI
1(
INV
) above.
1707 OVERRIDE REF 1=CONSTANT, 2=PID
Selects the source of the override reference.
1 =
CONSTANT
– Selects a preset frequency or speed for the override.
The frequency value is defined by parameter 1702
OVERRIDE FREQ
and the speed value by parameter 1703
OVERRIDE SPEED
.
2 =
PID
– The reference is taken from the PID output, see group 40
PROCESS PID SET 1.
•
Note: The following conditions must be met when using PID in the
override mode:
• PID1 set point (parameter 4010
SET POINT SEL
) can be either
A
1,
A
2
or
INTERNAL
.
• PID1 parameter set 1 must be active (parameter 4027
PID
1
PARAM
SET
=
SET
1).
• Override direction (parameter 1706
OVERRIDE DIR
) can be either
0 (
FORWARD
) or 7 (
REVERSE
).
Code Description Range
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