Program Flow Commands; Event Triggers & Trippoints - Galil Motion Control DMC-14 5 Series Manual

Program Flow Commands

The DMC-14XX provides instructions to control program flow. The DMC-14XX program sequencer
normally executes program instructions sequentially. The program flow can be altered with the use of
event triggers, trippoints, and conditional jump statements.
Event Triggers & Trippoints
To function independently from the host computer, the DMC-14XX can be programmed to make
decisions based on the occurrence of an event. Such events include waiting for motion to be complete,
waiting for a specified amount of time to elapse, or waiting for an input to change logic levels.
The DMC-14XX provides several event triggers that cause the program sequencer to halt until the
specified event occurs. Normally, a program is automatically executed sequentially one line at a time.
When an event trigger instruction is decoded, however, the actual program sequence is halted. The
program sequence does not continue until the event trigger is "tripped". For example, the motion
complete trigger can be used to separate two move sequences in a program. The commands for the
second move sequence will not be executed until the motion is complete on the first motion sequence.
In this way, the DMC-14XX can make decisions based on its own status or external events without
intervention from a host computer.
98 Chapter 7 Application Programming
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