Rockwell Automation IASIMP Computer Numerical Control (CNC) Machining Accelerator Toolkit Quick Start - Manual (Page 122)

122 Rockwell Automation Publication IASIMP-QS034A-EN-P - October 2012
Chapter 4
GuardLogix Configuration
The run sequence is initiated by a machine START command via the start logic in the R03_Control routine of
the application module. By default, the run sequence is initiated by placing a value of 1 in the RunSEQ[0] tag.
When the RunSEQ[0] tag is set to 1, the first step in the run sequence is executed, starting the run sequence.
Each of the rungs in the run sequence provides a placeholder where you can insert application-specific step logic.
The Run-sequence logic may include, for example, CNC commands, and/or other conditional diagnostic logic.
The move (MOV) instruction is a placeholder to advance the run sequence to the next step by incrementing the
RunSEQ[0] tag. Each step in the run sequence requires a unique value assigned in ascending order. The steps
typically increase by multiples of five or ten. By default, the run-sequence template steps 1…10…20…30, and so
on. Before moving to the next step, a predetermined condition must normally be met to make sure the current
step is complete.
Figure 10 - First Run Sequential Step Example
This CNC Work Cell application code first-run step (RunSEQ[0] = 1) example includes a latch (L) instruction,
as well as a MOV instruction for assigning a simulation number, used for this example. Also, the RunSeq MOV
instruction indexes to the next sequence step (for example, value 3 into RunSEQ[0] tag). The next rung, that has
EQU RunSeq = 3 as its condition, is then executed, and so forth.