Allen-Bradley PowerFlex 70 Reference Manual page 80

Digital Inputs
80
by using the terminal block digital inputs, and the Speed Select
Inputs will have no effect on which reference the drive is
currently using.
Because any combination of open / closed conditions (or unwired condition)
commands a reference source, the terminal block seeks accel ownership as
soon as the "Accel 2" input function is configured, which may happen at
power-up. In order for the terminal block to actually gain ownership, the
masks must be set up correctly (see above) and no other device can currently
have accel ownership. Once the terminal block gains accel ownership, it will
retain it until shutdown, until the [Accel Mask] or [Logic Mask] bits for the
terminal block are cleared, or until "Accel 2" is unconfigured.
For the "Decel 2" input function, deceleration rate selection ownership is
handled in a similar fashion to acceleration rate selection ownership.
• Acc2 & Dec2
In the second scheme, the "1" rates are combined (Acc and Dec) and the "2"
rates are combined. A single input function is used to select between [Accel
Time 1]/[Decel Time 1] and [Accel Time 2]/[Decel Time 2]. This input
function is called "Acc 2 & Dec 2".
If function is open, then drive will use [Accel Time 1] as the acceleration rate
and [Decel Time 1] as the deceleration rate. If function is closed, then drive
will use [Accel Time 2] as the acceleration rate and [Decel Time 2] as the
deceleration rate.
The same ownership rules as above apply.
• MOP Increment, MOP Decrement
These inputs are used to increment and decrement the Motor Operated
Potentiometer (MOP) value inside the drive. The MOP is a reference setpoint
(called the "MOP Value") that can be incremented and decremented by
external devices. The MOP value will be retained through a power cycle.
While the "MOP Increment" input is closed, MOP value will increase at rate
contained in [MOP Rate]. Units for rate are Hz per second.
While the "MOP Decrement" input is closed, MOP value will decrease at rate
contained in [MOP Rate]. Units for rate are Hz per second.
If both the "MOP Increment" and "MOP Decrement" inputs are closed,
MOP value will stay the same.
The terminal block bit must be set in the [MOP Mask] and [Logic Mask]
parameters in order for the MOP to be controlled from the terminal block.
In order for the drive to use the MOP value as the current speed reference,
either [Speed Ref A Sel] or [Speed Ref B Sel] must be set to "MOP."
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013