Rockwell Automation SP600 AC Drive User Manual Version 1.0 - Manual (Page 223)

Parameter Descriptions 12-93
23, 24 = MOP Increment, MOP Decrement: The MOP is a
reference setpoint (called the MOP Value) that can be incremented
and decremented by external devices. These inputs are used to
increment and decrement the Motor Operated Potentiometer (MOP)
value inside the drive. The MOP value will be retained through a
power cycle.
While the MOP Increment input is closed, the MOP value will
increase at the rate contained in MOP Rate. The rate units are Hz
per second.
While the MOP Decrement input is closed, MOP value will decrease
at the rate contained in MOP Rate. The rate units are Hz per
second.
If both the MOP Increment and MOP Decrement inputs are closed,
the MOP value will stay the same.
In order for the drive to use the MOP value as the current speed
reference, Speed Ref A Sel must be set to MOP.
25 = OIM Control: This input provides a means to override the logic
control source selection and can be used to override control from
any port, including the All Ports selection.
An open-to-closed transition of this input sets the control source to
the local OIM. If no local OIM is present, the control source is set to
the remote OIM. If no OIM is present at all, the drive stops.
When control is set to the OIM, the OIM is granted manual
reference (the Man Ref Preload (193) configuration is enforced).
Subsequent Auto/Manual commands will toggle the OIM in and out
of manual mode. The drive’s active or stopped state is not affected
unless no OIM is present.
On a closed-to-open transition, manual control is released if active,
and the selected auto reference is used. The logic source select
override is removed. The edge/level-sense start configuration is
imposed (LevelSense Start).
26 = PI Enable: If this input function is closed, the operation of the
Process PI loop will be enabled.
If this input function is open, the operation of the Process PI loop
will be disabled.
27 = PI Hold: If this input function is closed, the integrator for the
Process PI loop will be held at the current value; that is, it will not
increase or decrease.
If this input function is open, the integrator for the Process PI loop
will be allowed to increase or decrease.