Control Techniques Epsilon EP-P, Справочное руководство

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Epsilon EP-P Drive Reference Manual
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Revision A4 www.controltechniques.com
5 Parameter Descriptions
This section lists all programmable and feedback parameters available. The parameters are listed alphabetically by variable
name (shown in italics below the on screen name) and give a description. Range is dynamic and depends on User Unit
scaling. The units of the parameters are dynamic and depend on selected User Units.
Absolute Position Valid
AbsolutePosnValid
This source is activated when either the DefineHome destination is activated, or any home routine is successfully completed
(sensor or marker found). This source is deactivated if the drive is rebooted, an encoder fault occurs, the drive is powered
down, a home is re-initiate, or the UndefinedHome destination activates.
Accelerating
Accelerating
This source is active when the drive is executing an acceleration ramp. A normal index consists of 3 segments: Accelerating,
At Velocity, and Decelerating. The Accelerating source will be set (active) during this acceleration segment regardless of
whether the motor is speeding up or slowing down. Therefore, this source can sometimes be active when the motor is
decelerating. This could be true when compounding indexes together.
Acceleration Type
AccelType
This parameter is used to select the accel/decel type for all motion (homes, jogs and indexes). The “S-Curve” ramps offer the
smoothest motion, but lead to higher peak accel/decel rates. “Linear” ramps have the lowest peak accel/decel rates but they
are the least smooth ramp type. “5/8 S-Curve” ramps and “1/4 S-Curve” ramps use smoothing at the beginning and end of the
ramp but have constant (linear) accel rates in the middle of their profiles. The “5/8 S-Curve” is less smooth than the “S-Curve”
but smoother than the “1/4 S-Curve”. S-Curve accelerations are very useful on machines where product slip is a problem.
They are also useful when smooth machine operation is critical. Linear ramps are useful in applications where low peak
torque is critical. Below is a comparison of the 4 ramp types:
• S-Curve: Peak Accel = 2 x Average Accel
• 5/8 S-Curve: Peak Accel = 1.4545 x Average Accel
• 1/4 S-Curve: Peak Accel = 1.142857 x Average Accel
• Linear: Peak Accel = Average Accel
Acceleration Decimal Places
AccelUnits.Decimal
This parameter is the decimal point location for all real-time accel./decel. ramps.
Acceleration Time Scale
AccelUnits.TimeScale
This parameter is the time units for accel./decel. ramps. Possible selections are milliseconds or seconds.
At Velocity
AtVel
This source is active when the drive is executing a constant velocity motion segment. One example would be during an index.
The source would activate after the motor has finished accelerating up to speed and before the motor begins to decelerate to
a stop. A normal index consists of 3 segments: Accelerating, At Velocity, and Decelerating. This source is active during the At
Velocity segment, and is activated based on the commanded velocity, not the feedback velocity. During synchronized motion,
AtVel can be active without actual motor movement.
Bit Number Value
Bit.B#
This read/write bit may be used in a program as an intermediary variable bit controlled by the user. Bit.B# is one of 32 bits that
make up the BitRegister parameter. Assigned to communication networks such as DeviceNet, Profibus and Modbus, Bit.B#
may be used to transfer events that have occurred in a PLC to the program.
NOTE
When the value of Bit.B# is changed, the value of BitRegister.#.Value is changed as well.