Rockwell Automation 25B PowerFlex 520-Series Adjustable Frequency AC Drive User Manual - Manual (Page 207)

Rockwell Automation Publication 520-UM001G-EN-E - September 2014 207
Encoder/Pulse Train Usage and Position StepLogic Application Appendix E
needs direct access to any position step based on discrete inputs. This
mode moves in the forward direction from Home and is an absolute move.
2 “Step Logic” provides a highly flexible mode of operation. This can be
used to move through the steps (Step 0 to Step 7 and back to Step 0) or can
jump to a different step at any time based on time or the status of digital
inputs or communication commands. In this mode the drive always starts
at Step 0 of the Step Logic profile.
3 “Preset StpL” is identical to 2 “Step Logic” except the drive will use the
current status of the Preset Inputs to determine which Step Logic step to
begin. This only affects the initial step. After start, the drive will move
through the steps in the same manner as if setting 2 was selected.
4 “StpLogic-Lst” is identical to 2 “Step Logic” except the drive will use
the step prior to its last stop command to determine which Step Logic step
to begin. This only affects the initial step. After start, the drive will move
through the steps in the same manner as if setting 2 was selected. This
allows a process to be stopped and then restarted at the position where it
stopped.
In all position modes, the following parameters will control the characteristics at
each step:
L200 , L202 , L204 , L206 , L208 , L210 , L212 and L214 [Step Units x] are the
number value to the left of the decimal (whole number) of the 8 positions desired
for an application, beginning with Step 0 (L200) and continuing with each step
until Step 7 (L214). For example, enter 2 into this parameter if you would like a
commanded position of 2.77.
L201, L203, L205, L207, L209, L211, L213 and L215 [Step Units F x] are the
number value to the right of the decimal (the portion less than 1) of the 8
positions desired for an application, beginning with Step 0 (L201) and
continuing with each step until Step 7 (L215). For example, enter 0.77 into this
parameter if you would like a commanded position of 2.77.
A410 ... A417 [Preset Freq x] are the parameters that define the maximum
frequency the drive will run at during the corresponding step. For example, if
[Preset Freq 2] is set to 40 Hz, the drive will accelerate to 40 Hz maximum when
moving to Position 2.
IMPORTANT Advanced Step Logic options such as incremental move are not
available in this mode.
Frequency Source Step Source Position Source
A410 [Preset Freq 0] L180 [Stp Logic 0] L200 [Step Units 0]
A411 [Preset Freq 1] L181 [Stp Logic 1] L202 [Step Units 1]
A412 [Preset Freq 2] L182 [Stp Logic 2] L204 [Step Units 2]
A413 [Preset Freq 3] L183 [Stp Logic 3] L206 [Step Units 3]
A414 [Preset Freq 4] L184 [Stp Logic 4] L208 [Step Units 4]