ABB ACH550-UH User Manual page 395

ACH550 E-Clipse Bypass User's Manual
System External Control (25) [SYS EXT CTL]
If configured for System External Control, the relay is energized when Auto is
selected as the control mode for the selected power source (Drive or Bypass). The
System External Control relay is de-energized when either Hand or Off is selected
as the control mode for the selected power source.
Systen Overload (26) [SYS OVERLD]
If configured for System Overload, the relay is energized when either the drive or
bypass motor overload level has risen above the programmed protection setting.
This output is often used for motor overload indication. The System Overload relay is
de-energized during normal operation.
Contactor Fault (27) [CONTACT FLT]
If configured for Contactor Fault, the relay is energized when either a drive contactor/
bypass contactor fault has occurred. The Contactor Fault relay is de-energized
during normal operation.
System No Fault (28) [SYS NOT FLT]
If configured for System No Fault, the relay is energized during normal operation.
The System No Fault relay is de-energized when power is removed from the system,
a system fault has occurred or when the active motor overload/underload protection
has tripped. The specific nature of the fault is indicated on the control panel display
(Drive or Bypass).
Drive Link Error (29) [DRV LNK ERR]
If configured for Drive Link Error, the relay is energized when the communications
link between the drive and bypass has been interrupted. The Drive Link Error relay is
de-energized during normal operation.
External Comm Loss (30) [EXT COMM LS]
If configured for External Comm Loss, the relay is energized when the
communications link between the system (Drive/Bypass) and the external
communications network (building automation system) has been interrupted. The
External Comm Loss relay is de-energized during normal operation.
Override 2 Stop (31) [OVRD2 STOP]
If configured for Override 2 Stop, the relay is energized when the motor is expected
to stop during Override 2. For this relay to energize, Override 2 must be active and
parameter 1708 programmed for STOP. The Override 2 Stop relay is de-energized
during normal operation.
Override 2 Enable (32) [OVRD2 ENAB]
If configured for Override 2 Enable, the relay is energized when the drive is expected
to control the motor during Override 2. For this relay to energize, the drive output
contactor must be closed and any interlocks programmed as acknowledge in
parameters 1702...1707 must be present. The Override 2 Enable relay is
de-energized during normal operation.
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Bypass functions overview