2-70 Digital Inputs
configuration allows a single input to choose between [Speed Ref A Sel]
and [Speed Ref B Sel].
As another example, describes what reference selections can be made if
the “Speed Select 3” and “Speed Select 2” input functions are
configured, but “Speed Select 1” is not.
• Auto/Manual
The Auto/Manual facility is essentially a higher priority reference select.
It allows a single control device to assume exclusive control of reference
select, irrespective of the reference select digital inputs, reference select
DPI commands, the reference mask, and the reference owner.
If the “Auto/Manual” input function is closed, then the drive will use one
of the analog inputs (defined by [TB Man Ref Sel]) as the reference,
ignoring the normal reference selection mechanisms. This mode of
reference selection is called “Terminal Block Manual Reference
Selection Mode”.
If this input function is open, then the terminal block does not request
manual control of the reference. If no control device (including the
terminal block) is currently requesting manual control of the reference,
then the drive will use the normal reference selection mechanisms. This
is called “Automatic Reference Selection” mode.
The drive arbitrates among manual reference requests from different
control devices, including the terminal block.
• Accel 2 / Decel 2
The Acceleration/Deceleration Rate Control input functions (Acc/Dec
input functions for short) allow the rate of acceleration and deceleration
for the drive to be selected from the terminal block. The rates themselves
are contained in [Accel Time 1], [Decel Time 1], [Accel Time 2], and
[Decel Time 2]. The Acc/Dec input functions are used to determine
which of these acceleration and deceleration rates are in effect at a
particular time.
The terminal block bit must be set in the [Accel Mask] and [Logic Mask]
parameters in order for the acceleration rate selection to be controlled
from the terminal block. The terminal block bit must be set in the [Decel
Mask] and [Logic Mask] parameters in order for the deceleration rate
selection to be controlled from the terminal block.
There are two different schemes for using the Acc/Dec input functions.
Each one will be described in its own section.
Speed Select 1 Selected Parameter that determines Reference
Open [Speed Ref A Sel]
Closed [Speed Ref B Sel]
Speed Select 3 Speed Select 2 Selected Parameter that determines reference
Open Open [Speed Ref A Sel]
Open Closed [Preset Speed 2]
Closed Open [Preset Speed 4]
Closed Closed [Preset Speed 6]
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