Rockwell Automation 193 Drives and Motion Accelerator Toolkit Quick Start - Manual (Page 87)

Rockwell Automation Publication IASIMP-QS019E-EN-P - August 2013 87
Logic Configuration Chapter 4
The move (MOV) instruction is a placeholder to advance the stop sequence to the next step by incrementing the
StopSEQ[0] tag. Each step in the stop sequence requires a unique value be assigned in ascending order. The steps
typically increase by multiples of five or ten. By default, the stop sequence-template steps 1…10…20…30 …999.
Before moving to the next step, a predetermined condition must normally be met to make sure the current step is
complete.
By default, the stop sequence ends when the StopSEQ[0] tag value reaches 999. The StopSEQ[0] tag is then
monitored in the R02_Monitor routine of the application module for a value of 999 and then sets the
ApplicationName.Stopped tag. The machine module monitors the ApplicationName.Stopped tag to determine
when the application was properly stopped.
First Stop Sequential Step Example
This Widg-O-matic first-stop step example includes two motion axis stop (MAS) instructions, an instruction
error detection check, and axis stopped check. Before the MOV instructions indexes to the next sequence step
(for example, value 10 into the StopSEQ[0] tag), both axes must be stopped. An error detection check is used to
detect a module fault in the application module, preventing the stop sequence from inadvertently hanging on a
step.