Installation guide

ManualsBrandsMint ManualsComputer equipmentNextMove PCI

111

112

113

114

115

116

117

118

119

120

Keyword Reference Guide

MN1270 02.2002 103

Controllers Supported:

NextMove PCI NextMove PC NextMove BX MintDrive ServoNode 51

    

Format:

v = MOVEBUFFERFREE[axis]

Dot Parameters:

Axis - Axis No.

Attributes:

Controller Read Write Command Multi-

Axis

Scaled Default Range

All



0 ≤ x ≤ 100

Description:

Each axis maintains a data structure, into which moves are loaded, known as the move buffer. The size

of this buffer and hence the number of moves that can be loaded at any time can be configured with the

MOVEBUFFERSIZE keyword.

If the buffer is full and an attempt is made to load a valid move type, program execution will wait until

a free slot in the buffer becomes available. If the moves in the buffer require the

GO keyword in order to

start, the controller will hang in that state.

This situation can be avoided by using

MOVEBUFFERFREE to return the number of free spaces left in the

move buffer for the specified axis. If no moves are loaded then the number of free moves will be the

buffer size. As moves are loaded, the number of free spaces will decrease to zero, indicating that the

buffer is full.

The only exception to this is when following. The

FOLLOW move type will appear to not occupy any

space in the move buffer. Only one

FOLLOW move can be loaded though so this does not present a

problem.

Example:

LOOP

IF MOVEBUFFERFREE > 1 THEN GOSUB LoadNextMove

ENDL

This loops round testing the number of spaces available in the buffer. If there are 2 or more free spaces

then it calls a user routine to load another move.