Rockwell-automation 1784-PM16SE SoftLogix Motion Card Setup and Config Uživatelský manuál stáhnout pdf (Strana 295)

Publication 1784-UM003A-EN-P – June 2003

Motion Object Attributes 287

Output Cam Transition Status

The Output Cam Transition Status bit is set when a transition between the

currently armed and the pending Output Cam is in process. Therefore, each

Output Cam controls a subset of Output Bits. The Output Cam Transition

Status bit is reset, when the transition to the pending Output Cam is complete

or when the Output Cam is terminated by a MDOC instruction.

Motion Object

Configuration Attributes

The following sections define in more detail the behavior of all the various

configuration attributes associated with the Motion axis Object. The attributes

are, by definition, have read-write access. The Servo Object Configuration

Attributes are divided into five categories: Motion General Configuration,

Motion Units, Motion Conversion, Motion Homing, Motion Dynamics, and

Motion Instruction attributes. These categories correspond roughly to the

organization of the RSLogix 5000 Axis Properties pages.

Motion Unit Configuration

Attributes

Average Velocity Timebase

The Average Velocity Timebase attribute is used to specify the desired time in

seconds to be used for calculating the Average Velocity of the axis. When the

Average Velocity Value is requested, the value is computed by taking the total

distance traveled by the axis in the amount of time given by the Average

Velocity Timebase and dividing this value by the timebase.

The Average Velocity Timebase value should be large enough to filter out the

small changes in velocity which would otherwise result in a “noisy” velocity

value, but small enough to track significant changes in axis velocity. Typically, a

value between 0.25 and 0.5 seconds works well for most applications

GSV/SSV Access Attribute Name Data Type Values

GSV Output Cam Transition

Status

DINT Set of Output Cam Transition Status

bits

GSV/SSV Access Attribute Name Data Type Values

SSV/GSV Average Velocity Timebase REAL Sec

1 2 ... 290 291 292 293 294 295 296 297 298 299 300 ... 450 451

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Rockwell-automation 1784-PM16SE SoftLogix Motion Card Setup and Config Uživatelský manuál Strana 295