Reference Manual

Turbo PMAC/PMAC2 Software Reference

Turbo PMAC On-line Command Specification 295

B{constant}

Function: Point the addressed coordinate system to a motion program.

Scope: Coordinate-system specific

Syntax: B{constant}

where:

{constant} is a floating point value from 0.0 to 32767.99999 representing the program and location to

point the coordinate system to; with the integer part representing the program number, and the fractional

part multiplied by 100,000 representing the line label (zero fractional part means the top of the program).

This command causes Turbo PMAC to set the program counter of the addressed coordinate system to the

specified motion program and location. It is usually used to set the program counter to the Beginning of a

motion program. The next R or S command will start execution at this point.

If {constant} is an integer, the program counter will point to the beginning of the program whose

number matches {constant}. Fixed motion program buffers (PROG) can have numbers from 1 to

32,767. The rotary motion program carries program number 0 for the purpose of this command.

If {constant} is not an integer, the fractional part of the number represents the line label (N or O) in

the program to which to point. The fractional value multiplied by 100,000 determines the number of the

line label to which to point (it fills the fraction to 5 decimal places with zeros).

Note:

If a motion program buffer (including ROTARY) is open when this command is

sent to Turbo PMAC, the command is entered into the buffer for later execution, to

be interpreted as a B-axis move command.

Example:

B7 ;points to the top of PROG 7

B0 ;points to the top of the rotary buffer

B12.6 ;points to label N60000 of PROG 12

B3.025R ;points to label N2500 of PROG 3 and runs