User manual

PMAC User Manual
Writing Programs for PMAC 217
It is possible to move these non-motion actions to a point one or two moves later in the program to get the
actions to occur when they are desired. However, this makes the program extremely difficult to read as
far as the proper sequence of operations.
Synchronous M-Variable Assignment
The synchronous M-variable assignment statement is designed to get around this problem. This type of
statement uses a double equals sign (==) instead of a single equals sign. This is a flag to PMAC to hold
off the actual execution of the statement until the beginning of the move immediately following it, so the
actual action coincides with the actual motion.
Synchronous M-variable assignment statements are discussed in detail in the Computational Features
section of the User's Guide, with syntax instructions under M{constant}=={expression}.