User guide

58 www.controltechniques.com SM-EZMotion Module User Guide
7.3.9.4.3 Time Before Trip 0
All Trip Times for Trips other than Trip 0 are stored as a
period of Time between Trip 0 and the specific Trip. The
format for the Time is Hrs.Minutes. For example, if Trip 4
Time is shown as 1.20, that would signify that Trip 4
occurred 1 Hour and 20 Minutes prior to Trip 0. The largest
value that can be stored in the Time Before Trip 0 is 600
Hours and 00 Minutes. If 600 Hours is exceeded, the 600
Hours and 00 Minutes is displayed in the Trip Log.
7.3.10 PLS View
The PLS View allows the user to configure all the
parameters necessary for the available Programmable
Limit Switches. Figure 78 is an example of the PLS view.
Figure 78: PLS View
7.3.10.0.1 Source
The source of a PLS can be assigned to the motor axis
(MotorPosnFeedback, MotorPosnCommand) or a master
synchronization signal (MasterPosnFeedback). The term
motor axis refers to the motor being controlled by the
SM-EZMotion/drive combination. The source list box is
used to select the source for the individual PLS.
7.3.10.0.2 On Point
PLS.#.Status will be active when the selected source
position is between the PLS.#.OnPosn and the
PLS.#.OffPosn. Assume that the PLS.#.Direction is set to
"Both". When traveling in the positive direction and the
feedback position executes the OnPosn, the PLS.#.Status
will activate. As the motor continues in the same direction,
the PLS.#.Status will deactivate when feedback position
reaches or exceeds the OffPosn. If motor travel changes to
the negative direction, the PLS.#.Status will activate when
the feedback position reaches the OffPosn, and will
deactivate when it continues past the OnPosn. All on/off
positions are defined in user units.
PLS.#.Status will be active if:PLS.#.OnPosn <
Feedback
Position <
PLS.#.OffPosn
7.3.10.0.3 Off Point
PLS.#.Status will be active when the selected source
position is between the PLS.#.OnPosn and the
PLS.#.OffPosn. Assume that the PLS.#.Direction is set to
"Both". When traveling in the positive direction and the
feedback position reaches the OnPosn, the PLS.#.Status
will activate. As the motor continues in the same direction,
the PLS.#.Status will deactivate when feedback position
reaches or exceeds the OffPosn. If motor travel changes to
the negative direction, the PLS.#.Status will activate when
feedback position reaches the OffPosn, and will deactivate
when it continues past the OnPosn.
PLS.#.Status will be active if:PLS.#.OnPosn <
Feedback
Position <
PLS.#.OffPosn
If using negative values for your OnPosn and OffPosn, the
most negative value should go in the OnPosn parameter,
and the least negative value should go in the OffPosn.
If the PLS has a rollover point, and the OnPosn is greater
than the OffPosn, the PLS will be active whenever the
position feedback is not between the On and Off positions,
and in-active whenever the position feedback is between
the two positions. However, the PLS.#.Status will not turn
on until it reaches the OnPosn the first time.All on/off
positions are defined in user units.
7.3.10.0.4 Direction
This parameter specifies the direction of motion that a
particular PLS output will function. If set to Both, the PLS
will activate regardless of whether the motor (or master
motor) is moving in the positive or negative direction. If set
to Plus, the PLS will activate only when the motor is moving
in the positive direction. If set to Minus, the PLS will
activate only when the motor is moving in the negative
direction.
For example, a flying cutoff or flying shear application may
use this feature to activate the PLS to fire the knife only
when the axis is moving in the positive direction.
7.3.10.0.5 Rotary Enable
This parameter is used to enable the RotaryRolloverPosn
for this PLS.
7.3.10.0.6 Rollover Position
This parameter is the absolute position of the first repeat
position for this PLS. When enabled it causes the PLS to
repeat every time this distance is passed. The repeating
range begins at an absolute position of zero and ends at
the RotaryRolloverPosn.
For example, in a rotary application a PLS could be setup
with an OnPosn of 90 degrees and an OffPosn of 100
degrees. If the RotaryRolloverPosn is set to 360 degrees
the PLS would come on at 90, go off at 100, go on at 450
(360+90), go off at 460 (360+100), go on at 810
(2*360+90), go off at 820 (2*360+100), and continue
repeating every 360 degrees forever.