Reference Manual

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Turbo PMAC/PMAC2 Software Reference

Turbo PMAC On-line Command Specification 309

Note:

Turbo PMAC will reject the DEFINE LOOKAHEAD command, reporting an

ERR003 if I6=1 or 3, if any LOOKAHEAD buffer exists for a lower-numbered

coordinate system, or if a GATHER buffer exists. LOOKAHEAD buffers must be

defined from high-numbered coordinate system to low-numbered coordinate

system, and deleted from low-numbered coordinate system to high-numbered

coordinate system.

Example:

DELETE GATHER ; Ensure open memory

&2DEFINE LOOKAHEAD 1000,200 ; Create buffer for C.S. 2

&1DEFINE LOOKAHEAD 1500,20 ; Create buffer for C.S. 1

DEFINE ROTARY

Function: Define a rotary motion program buffer

Scope: Coordinate-system specific

Syntax: DEFINE ROTARY{constant}

DEF ROT{constant}

where:

 {constant} is a positive integer representing the number of long words of memory to be reserved

for the buffer

This command causes Turbo PMAC to create a rotary motion program buffer for the addressed

coordinate system, allocating the specified number of long words of memory. Rotary buffers permit the

downloading of program lines during the execution of the program.

The buffer should be large enough to allow it to hold safely the number of lines anticipated to be

downloaded to Turbo PMAC ahead of the executing point. Each long word of memory can hold one sub-

block of a motion program (i.e. X1000 Y1000 is considered as two sub-blocks). The allocated memory

for this coordinate system’s rotary buffer remains resident until the buffer is deleted with DELETE ROT.

Note:

Turbo PMAC will reject this command, reporting an ERR003 if I6=1 or 3, if any

ROTARY buffer exists for a lower numbered coordinate system, or if a

LOOKAHEAD or GATHER buffer exists. Any of these buffers must be deleted

first. ROTARY buffers must be defined from high-numbered coordinate system to

low-numbered coordinate system, and deleted from low-numbered coordinate

system to high-numbered coordinate system.

Example:

DELETE GATHER ; Ensure open memory

&2DEFINE ROT 100 ; Create buffer for C.S. 2

&1DEFINE ROT 100 ; Create buffer for C.S. 1

&1B0 &2B0 ; Point to these buffers

OPEN ROT ; Open these buffers for entry

... ; enter program lines here