Red Lion MDC - Manual (Page 37)

DEDICATED FUNCTION AND USER INPUTS
Refer to the Terminal Connections drawing. TBA is the bottom terminal
block and TBB is the top terminal block.
RUN (TBB8): A momentary closure to common on the
RUN input causes the MDC to accelerate the motor from
STOP mode to the current speed setpoint using the
current ramp rate.
- R-STOP (TBB-9) and F-STOP (TBB-10) must be held
low or tied to common (TBB-3).
- MDC must be in the Indication Display or User Setpoints Module.
- MDC may not be in JOG mode.
R-STOP (TBB9): A momentary open from common on the
R-STOP input causes the MDC to decelerate the motor
from its current speed to STOP mode using the current
ramp rate.
- MDC must be in RUN mode. R-STOP is inoperative in
JOG mode.
F-STOP (TBB10): A momentary open from common on the
F-STOP input causes the MDC to execute a fast stop,
taking the analog Drive Output signal immediately to zero
volts. The motor deceleration is limited only by the motor
drive system. This is an emergency stop function. The
drive Enable Output goes immediately to its inactive state and may be used
to engage braking or remove power from the motor via an external relay.
- F-STOP overrides all other active function inputs for as long as the
F-STOP input remains active. The function priority from highest to
lowest is: F-Stop, Jog, R-Stop, and Run. To lock out all other input
functions, use a maintained switch on the F-Stop input.
F-STOP is operative in RUN and JOG modes and the Program
Diagnostics Menu.
Note: This does not guarantee that the drive is disabled unless the Drive
Enable Output is used with an external relay to disconnect AC drive power.
JOG (TBB11): The jog function is only available from the
STOP mode. A sustained closure from the JOG input to
common causes the MDC to accelerate the motor to the
jog speed setpoint using the jog ramp rate. The motor will
remain at the jog speed until the closure is removed, at
which point the MDC will execute an F-STOP.
- Operative from STOP mode only.
- R-STOP (TBB-9) and F-STOP (TBB-10) must be held low or tied to
common (TBB-3).
- MDC must be in the Indication Display or User Setpoint Module.
OPEN LOOP (TBB12): A maintained closure to common on
this input causes the MDC to run open loop. The error
correction value, Trim, is set to zero and speed is not
regulated. A momentary closure on this input can be used as a
Trim reset, to momentarily reset the Trim value to zero.
USER INPUTS 1 to 4 (TBB4 to 7): The User Input terminals require a
closure to common to execute a programmable function. The action
required may be maintained or momentary depending upon the function.
The functions available are: View Display, Change Display, Reset Alarm,
Setpoint Select, Ramp Select, Ramp Override, Increment Setpoint,
Decrement Setpoint, and Program Disable. For a complete description of
these functions, see the Program User Menu.
ALARM OUTPUTS 1 AND 2
The alarm outputs are open collector solid state outputs. They are
programmable for High Alarm, Low Alarm, Deviation Alarm and Zero
Speed Alarm functions. For details, see the Program Alarms Menu and the
Block Diagram.
DRIVE ENABLE OUTPUT
The Drive Enable Output (TBA #7) provides an open collector closure to
common whenever the MDC is in a RUN or JOG mode. It is inactive (open)
only when the MDC is in STOP mode. This output may be used to control a
relay which removes power from the motor and drive in STOP mode (see
Block Diagram for details).
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