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Epsilon EP-P Drive and FM-3/4 Module Reference Manual
PLS Source
PLS.#.Source
PLSs can be assigned to three different sources: MotorPosnFeedback, MotorPosnCommand, or MasterPosnFeedback. This
parameter determines which position signal the PLS uses to reference its OnPosn and OffPosn in order to determine its
PLS.#.Status parameter.
PLS Status
PLS.#.Status
This source is active when the position of the PLS source (motor or master) is greater than or equal to the OnPosn and less
than the OffPosn.
Positive Direction
PositiveDirection
This bit is used to select which direction of motor rotation is considered motion in the positive direction. Select from CW or
CCW.
Position Command
PosnCommand
Position command sent to the EN drive by the FM-4 module. This parameter does not take following error into account. See
also PosnFeedback and FollowingError. Units are in user units.
Position Error Integral Enable
PosnErrorIntegralEnable
This parameter is used to enable the position error integral compensation. See also Position Error Integral Time Constant.
Position Error Integral Time Constant
PosnErrorIntegralTimeConstant
Position Error Integral parameter is a control term, which can be used in Pulse mode to compensate for the continuous torque
required to hold a vertical load against gravity or to minimize following error.
The user configures this control term using the “Position Error Integral Time Constant” parameter. This parameter determines
how quickly the drive will correct for in-position following error. The time constant is in milliseconds and defines how long
it will take to decrease the following error to 37 percent of the original value. In certain circumstances the value actually used
by the drive will be greater than the value specified here.
Min Time Constant = 1000/Response
For example, with “Response” set to 50, the minimum time constant value is 1000/50 = 20 msec.
Position Feedback
PosnFeedback
Feedback position is the actual motor position in user units. PosnCommand minus the PosnFeedback is the FollowingError
Position Feedback In Counts
PosnFeedbackInCounts
Motor encoder position in encoder counts since power up. This position reflects the feedback position of the motor and is
not scaled into user units. It can be used to confirm the exact position of the motor in applications where precise positioning
is required.
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