Reference Manual

PMAC 2 Software Reference

PMAC Program Command Specification 331

M{data}

Function

Machine Code (M-Code)

Type

Motion program

Syntax

M{data}

where:

• {data} is a floating-point constant or expression in the range 0.000 to 999.999,

specifying the program number and the line label to jump to.

Remarks

PMAC interprets this statement as a CALL 10n1.({data’}*1000) command,

where n is the hundreds’ digit of {data}, and {data’} is the value of {data}

without the hundred’s digit (modulo 100 in mathematical terms). That is, this statement

causes a jump (with return) to motion program 10n1, and the specified line label.

(Programs 10n1 are usually used to implement the machine codes as the system designer

sees fit.) The value of {data’} can be from 0.0 to 99.999, corresponding to line labels

N0 to N99999.

If the specified program and/or line label do not exist, the M command is ignored, and the

program continues as if it were not there. No error is generated.

This structure permits the implementation of customizable M-code routines for machine-

tool style applications by the writing of subroutines in motion programs 10n1.

Arguments can be passed to these subroutines by following the M-code with one or more

sets of {letter}{data}, as in CALL and READ statements.

Typically, M-codes will be only in the range 0-99, which permits the use of PROG 1001

only, and allows {data’} to equal {data} for direct specification of the line label.

Example

M01 jumps to N1000 of PROG 1001

M12 jumps to N12000 of PROG 1001

M115 jumps to N15000 of PROG 1011