Emerson FM-3 Manual de instalación descargar pdf (Pagina 52)

FM-3 Programming Module Reference Manual

In Position Window

The absolute value of the Following Error must be less than or equal to this value at the end

of an index in order for the InPosn destination to activate. This window is set in units specified

in the User Units View.

For example:

The In Position window is set to .0025 revs. At the end of an index, the following error

is calculated to be .0012 revolutions. Therefore, the InPosn source will activate.

In Position window is set to .001 inches. If at the end of an index, the following error is

calculated to be .0015 inches, then the InPosn source will not activate.

In Position Time

This is the amount of time in seconds that commanded motion must be complete and the

absolute value of the following error must be less than the In Position Window for the InPosn

source to activate. If set to zero (default), then InPosn will activate as soon as motion stops

and the following error is less than the In Position Window parameter.

Limits Group

Enable Following Error Check Box

Check this box to enable (or disable if not checked) the Following Error Limit. If enabled, a

fault will be generated if the absolute value of the following error ever exceeds the value in

the following error parameter. If disabled, a fault will never be generated.

Following Error

The Following Error is the difference between the Position Command and the Position

Feedback. It is positive when the Position Command is greater than the Position Feedback. If

the absolute value of the following error exceeds the value you enter here, the drive will

generate a Following Error Fault (F). All accumulated Following Error will be cleared when

the drive is disabled.

The Following Error Limit is defined in user units.

Enable Software Travel Limits Check Box

Check this box to enable (or disable if not checked) the software travel limits. If unchecked,

the software travel limits are not monitored.

Software Travel Limits

Software Travel limits can be used to limit machine travel. They are often setup inside the

hardware travel limits to add another level of security or protection from exceeding the

machines travel limits. The FM-3 constantly monitors the feedback position, and if this

position exceeds the values entered for Software Travel Limit + or -, then the drive will decel

to a stop. Software Travel Limits are not functional unless the Absolute PosnValid source is

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Emerson FM-3 Manual de instalación Pagina 52