Owner's manual

Chapter 30

Using a 9/Series Dual--processing System

Synchronization in MDI Mode

Synchronization M-codes can be programmed in MDI mode. These can

prove useful when attempting to manually start multiple programs from

some point other than the beginning or when it is necessary to execute

MDI programs on both processes simultaneously. By inserting a

synchronization M-code (by using MDI and pressing cycle start) you can

start a process e xecuting, but place it in pause until you start the second

process a nd it executes the corresponding synchronization code.

Example 30.5

Synchronization in MDI Mode

Process 1 (MDImode) Comment Process 2 (MDImode) Comment

N1M100; You canpress<CYCLESTART > and

this blockpauseswhileyou MDIthe

necessary informationinto process 2.

N1M100; Pressing <CYCLESTART> atthis block

hastheeffectofstartingbothprocesses’

MDI programatthe same time.

G28 X10 Z10;

Program Interrupts During Synchronization Blocks

Program interrupts can be performed while a process is being paused by a

synchronization M-code (see chapter 29 for details on interrupts). If the

process i s paused when the interrupt is requested, the request is recognized;

however, the interrupt does not execute until the synchronization M-code is

released by the other process, executing the appropriate synchronization

code.

<CYCLE STOP> During Synchronization Blocks

Press <CYCLE STOP> places in cycle suspend mode while it is paused by

a synchronization M-code. This lets you perform most manual operations

(such as jog retract) and other functions normally available to a process in

cycle suspend mode. No loss of synchronization occurs while the process

is in cycle suspend.

Block retrace does not retrace through part program blocks with

synchronization M-codes in them. The error message “NO FURTHER

RETRACE ALLOWED”appears.