Positioning operation – Rockwell Automation 22D PowerFlex 40P User Manual, FRN 3 User Manual
Page 173
Encoder Usage and Position StepLogic Application
F-5
Positioning Operation
Parameter
[Positioning Mode] must be set to properly match the
desired operation of the positioning function.
E222 [Positioning Mode] Options
0 “Time Steps” uses Step Logic times. This mode ignores the Step
Logic settings and moves through the steps (Step 0 to Step 7 and back to
Step 0) based on the times programmed into
[Stp Logic
Time x]. This can be used when the desired position is based only on
time. In addition, this mode only accepts absolute positions in a positive
direction from “home”. This option provides an easy way to implement a
simple positioning program or to test the basic positioning setup. For
additional flexibility one of the other settings should be used.
1 “Preset Input” directly commands movement to any step based on the
status of the digital inputs programmed for “Preset Freq”. This setting
ignores the Step Logic Commands settings and instead the drive will
move directly to whatever step is currently commanded by
[Preset Freq x] and
[Step Units x]. This is useful when an
application 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.
Important: Advanced Step Logic options such as incremental move are
not available in this mode.
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 option 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 option 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 option 2 was
selected. This allows a process to be stopped and then restarted at the
position where it stopped.