Emerson Control Techniques FM-4 Reference Manual page 209

Packed Bits Status Word Value
PackedBits.StatusWord.#.Value
When accessing the Packed Bits Status Words for network mapping or use in a program, the Value parameter is what holds
the data. When used in a program, the "P ackedBits." and the ".Value" portions of th e parameter name are optional. Therefore,
to read the Status Word Value in a program, the following lines of code are all interchangeable:
Var.MyVar = PackedBits.StatusWord.0.Value
Var.MyVar = PackedBits.StatusWord.0
Var.MyVar = StatusWord.0.Value
Var.MyVar = StatusWord.0
PLS Direction
PLS.#.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 axis is moving in the positive or negative direction. If set to Plus, the PLS will activate only when
the axis is moving in the positive direction. If set to Minus, the PLS will activate only when the axis is moving in the negative
direction. 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.
PLS Off Point
PLS.#.OffPosn
PLS.#.Status will be active when the selected source position is between the PLS.#.OnPosn and the PLS.#.OffPosn. The
terms On and Off assume you are traveling in a positive direction. Assume that the PLS.#.Direction is set to "Both". When
traveling in the positive direction and the position feedback 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 position feedback reaches the OffPosn,
and will deactivate when it continues past the OnPosn. The important thing to remember is that the PLS.#.Status will be
active if between the PLS On and Off points.
If using negative values for the 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 axis is not
between the On and Off positions, and inactive whenever the axis is between the two positions. However, the PLS.#.Status
will not turn on until it reaches the OnPosn the first time.
PLS On Point
PLS.#.OnPosn
PLS.#.Status will be active when the selected source position is between the PLS.#.OnPosn and the PLS.#.OffPosn. The
terms On and Off assume the motor is traveling in a positive direction. Assume that the PLS.#.Direction is set to "Both".
When traveling in the positive direction and the position feedback 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 position feedback reaches the
OffPosn, and will deactivate when it continues past the OnPosn. The important thing to remember is that the PLS.#.Status
will be active if between the PLS On and Off points.
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 axis is not
between the On and Off positions, and inactive whenever the axis is between the two positions. However, the PLS.#.Status
will not turn on until it reaches the OnPosn the first time.
PLS Enable
PLS.#.PLSEnable
This destination is used to enable an individual PLS. A PLS can be enabled though the Assignments view in PowerTools Pro
or from a program. If enabled, the PLS will begin to function as soon as the drive has been homed or a DefineHome
Parameter Descriptions
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