ABB ACH550-UH User Manual page 387

ACH550 E-Clipse Bypass User's Manual
Parameter
Parameter Name
Number
1701 OVERRIDE 2
1702 RUN EN OVR
1703 ST EN 1 OVR
1704 ST EN 2 OVR
1706 ST EN 4 OVR
1707 FAULTS OVR
1708 OVR2 MODE
1410 RO4 SELECT
1411 R4 ON DLY
1412 R4 OFF DLY
1413 RO5 SELECT
1414 R5 ON DLY
1415 R5 OFF DLY
Indicates a parameter that is unchanged from its default value.
Parameter Value
Programming the E-Clipse Bypass for Advanced Override Operation
[1] DI5
[1] BYPASS
[2] VFD
[3] VFD/BYPASS
[4] STOP
[12] OVERRIDE
[32] OVRD2 ENAB
Digital Input 2 of the E-Clipse Bypass is used to activate
Override operation for both the VFD and the E-Clipse
Bypass.
as required Determines whether the E-Clipse's Run Enable input can
interrupt Override operation. (The default value does not
allow Run Enable to interrupt Override operation. If the
damper control interlock function is desired during
Override operation, this interlock must be
ACKNOWLEDGED.)
as required Determines whether the Eclipse's Start Enable 1 input can
interrupt Override operation. (The default value does not
allow Start Enable 1 to interrupt Override operation.)
as required Determines whether the Eclipse's Start Enable 2 input can
interrupt Override operation. (The default value does not
allow Start Enable 2 to interrupt Override operation.)
as required Determines whether the Eclipse's Start Enable 4 input can
interrupt Override operation. (The default value does not
allow Start Enable 4 to interrupt Override operation.)
as required Determines whether certain Eclipse Faults can interrupt
Override operation.
as required
During Override 2 operation, the motor will only run at full
speed in bypass mode.
During Override 2 operation, the motor will only run at a
controlled speed from the ACH550 VFD. Parameter
Group 17 in the ACH550 VFD is used to program its
operation.
If the VFD cannot run the motor, the motor will stop.
Requires additional control wiring between E-Clipse and
ACH550 VFD.
During Override 2 operation, the system will first attempt
to run the motor from the ACH550 VFD, as programmed
in Parameter Group 17 of the ACH550 VFD.
If the VFD loses power or is in a fault condition, the
system will use the E-Clipse Bypass to run the motor at
full speed in bypass mode.
Requires additional control wiring between E-Clipse and
ACH550 VFD.
During Override 2 operation, the motor will stop.
When the E-Clipse Bypass is in the Override 1 or
Override 2 mode, this relay will activate. Its normally open
contacts are wired to activate the Override function in the
ACH550 VFD. This will cause the VFD to display ALARM
2020, Override. It will also lock out the ability to change
the VFD's parameters or control it externally.
0.0 s
0.0 s
Enables Override 2 operation for the VFD based on the
programming of E-Clipse parameters 1702 through 1707.
The normally open contact of this relay is wired to apply
control voltage to Digital Input 4 of the ACH550 VFD. This
enables the VFD to run in Override mode. The E-Clipse
Bypass can stop the VFD during Override 2 operation by
opening this contact.
0.0 s
0.0 s
Notes
Comments
Bypass functions overview
2-41