Curtis PMC 1297 Manual
43
Emergency R everse Parameters
3
A
— PROGRAMMABLE TRACTION PARAMETERS: Emergency Reverse
EMR REV C/L
The emergency reverse current limit parameter defines the maximum braking
current provided through the motor when the optional emergency reverse
function is engaged. The emergency reverse current limit is adjustable from 50
amps up to the controller’s full rated braking current. (The full rated braking
current depends on the controller model; see specifications in Table E-1.)
EMR REV CHECK
The emergency reverse check parameter is applicable only when the emergency
reverse feature is being used in the application. If emergency reverse is not being
used, this parameter should be set to Off.
When enabled (programmed On), the emergency reverse check tests for
continuity from the emergency reverse check output (J1 Pin 9) to the emer-
gency reverse input (J1 Pin 6). Therefore, the emergency reverse wiring should
be connected as closely as possible to the controller side of the emergency
reverse switch. The recommended wiring is shown in Figures 3 and 4, pages 8
and 10.
EMR REV ACCEL
The emergency reverse acceleration rate parameter defines the time it takes the
controller to accelerate from 0% to 100% output in the opposite direction when
emergency reverse is activated. Larger values represent a longer acceleration time
and therefore a gentler response. More abrupt response can be achieved by
reducing the acceleration time, i.e., by setting the accel rate to a lower value.
The emergency reverse accel rate is adjustable from 0.0 to 3.0 seconds.
EMR REV TIME LIMIT
The emergency reverse time limit parameter can be used to provide a 5 second
time limit on emergency reversing. If this parameter is programmed On,
emergency reversing will stop after 5 seconds even if the emergency reverse
button is still being pushed in; at the end of this 5 second period, the controller
will set the drive output to zero. If this parameter is programmed Off, emergency
reversing will continue as long as the emergency reverse button is pushed in.
EMR DIR INT
As soon as the emergency reverse button is released, the controller sets the drive
output to zero regardless of whether a direction or throttle is still being
requested. The emergency reverse direction interlock parameter defines how
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