Rockwell Automation MMCL Using the Mining, Mineral, and Cement Library (MMCL) in RSLogix 5000 Appli - Manual (Page 54)

Publication RA-UM002B-EN-P - November 2010
54 Application Examples
Example 3 –
One Group with Two Starts
A Control Group may be started in multiple steps, if the start-up sequence is
interrupted by switching the Group's PartRun input ON. In this case, the
CtrlGrp selects the Ready state and waits for a restart command from the
operator.
The diagram below shows how the output RdyAuto from Machine M2, can be
used to interrupt the EnAutoStart command, by control bit B=0 and
Group.PartRun=1. After restarting by the operator, the CtrlGrp starts again
with normal startup warnings. During the startup phase, the EnAutoStart is
cleared by the CtrlGrp and control bit B=1. Now Machine M3 and the
following devices will start in programmed order.