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ACH550-UH User’s Manual
Parameters
1703
OVERRIDE SPEED
-30.000…30.000 rpm
1
0 rpm
Defines a preset speed for the override.
Note! Set this value if motor control mode (parameter 9904) is
VECTOR
:
SPEED
(1).
1704
OVERR PASS CODE
0…65535
1
0
Entering the correct override pass code unlocks parameter 1705 for one change.
• Enter the pass code always before changing the value of the parameter 1705.
• See parameter 1705 below.
• The pass code is 358.
• The entry reverts back to zero automatically.
1705
OVERRIDE ENABLE
0…1
1
0 (
OFF
)
Selects whether the override is enabled or disabled.
0 =
OFF
– Override disabled.
1 =
ON
– Override enabled.
• When enabled, the drive stores the values of all parameters into an override parameter set (see parameter 9902)
and the parameters in Group 17 will be write protected (except parameter 1704). To change the other
parameters in the Group 17, override has to be disabled.
1706
OVERRIDE DIR
-6…7
1
0 (
FORWARD
)
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.
• Activating the digital input selects the forward direction.
• De-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.
• De-activating the digital input selects the forward direction.
• 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, 2
1
1 (
CONSTANT
)
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
.
Group 17: Override
Code Description Range
Resolution
Default
S
Summary of Contents for ACH550-UH HVAC
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Page 8: ...1 8 ACH550 UH User s Manual Table of contents ...
Page 32: ...1 32 ACH550 UH User s Manual Installation ...
Page 66: ...1 66 ACH550 UH User s Manual Application macros ...
Page 186: ...1 186 ACH550 UH User s Manual Parameters ...
Page 333: ...ACH550 UH User s Manual 1 333 Technical data ...
