Emerson FM-3 manual Decelerating, DefineHomePosn, DistUnits.CharacteristicDist

FM-3 Programming Module Reference Manual

Decelerating

Decelerating

This source is active when the FM-3 module is decelerating. A normal index consists of 3 segments: Accelerating, At Velocity, and Decelerating. Decelerating follows the accelerating segment and the At Velocity segment. When indexes are compounded to create a complex motion profile, only the last index may contain a decelerating segment.

Define Home

DefineHome

This destination is used to set the Commanded Position to the value specified in the DefineHomePosn variable. On the rising edge of this input function the absolute position is set equal to the DefineHomePosn and the AbsolutePosnValid output function (source) is activated.

Define Home Position

DefineHomePosn

The DefineHome parameter is used to set the motors absolute position to the value stored in the DefineHomePosn variable. On the rising edge of the DefineHome function the Commanded Position is set equal to the DefineHomePosn and the AbsolutePosnValid source is activated.

Characteristic Distance

DistUnits.CharacteristicDist

This parameter is the distance the load travels (in user units) when the motor travels the characteristic length (in motor revolutions). This parameter is used along with the DistUnits.CharacteristicLength to establish the relationship between user distance and actual motor travel distance. See the section on the User Units View in the Setting Up Parameters chapter.

Characteristic Length

DistUnits.CharacteristicLength

This parameter is the distance the motor travels (in whole number of revolutions) to achieve one characteristic distance of load travel. This parameter is used along with the DistUnits.CharacteristicDist to establish the relationship between user distance and motor travel distance. See the section on the User Units View in the Setting Up Parameters chapter.

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