Chapter 5—System Configuration and Operation
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
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73
Reverser Operation Mode
Description
The Reverser starter profile will use the motor1 parameters
for all control/protections.
C445 outputs:
●
Output 1 is configured as the FWD relay output
●
Output 2 is configured as the REV relay output
●
Output 3 is general purpose
Output 1 controls the FORWARD contactor. Output 1 will
close when a valid FWD(RUN1) command is received and
there is no active fault or inhibit.
It will open on a STOP command or if a trip occurs.
Output 2 controls the REVERSE contactor. Output 2 will
close anytime a valid REV(RUN2) command is received and
there is no active fault or inhibit. It will open on a STOP
command or if a trip occurs.
A C445 trip will cause Outputs 1 and 2 to open effectively
dropping out the reverser.
Output 3 is a user configurable output whose function can be
changed by the user.
A transition from FWD to REV or REV to FWD must first go
through STOP unless the Control Interlocking Time
parameter is set to a value of 0. If the value of this parameter
is greater than 0, the control will transition to Stop for that
delay time before transitioning to the new direction. The
Control Interlocking Time parameter can be found in the
Operation mode category in the Power Xpert
in
Control
Software Tool.
The C445 will issue a control fault when:
●
RunFwd or RunRev command is active and phase voltage
is present with no phase current detected after delay
expires
●
Stop command active and current detected after delay
expires
Note:
Even with the control fault disabled, the C445 will
NOT transition to a new direction until current
readings decrease to zero.
Figure 68. Timing Diagram for the Reverse Operation
Mode
Recommended User Interface Options for the
Reverser Operation Mode
Figure 69. C445UM: Monitoring User Interface
The Monitoring User Interface can be used with any
operation mode. If selected as a local control source, the
User Interface Start and Stop buttons are enabled in
Reverser Mode. The screen provides selection and indication
of Fwd/Rev. Use the soft keys to select Fwd or Rev before
pressing the Start button. When running, the highlighted
selection indicates direction. Users may optionally disable
local start or reset functionality if desired.
C445UM may still be used in Reverser if the User Interface is
not the local control source. Start, Stop and Auto buttons will
be disabled. If pressed, the screen will notify the user that
this functionality is not enabled. Control Status LEDs
indicating running, stopped and Auto status will still function.
FWD
REV
Interlock Time
Timing Diagram
Control Fault Delay
