Rockwell Automation MMCL Using the Mining, Mineral, and Cement Library (MMCL) in RSLogix 5000 Appli - Manual (Page 23)

23 Publication RA-UM002B-EN-P - November 2010
Chapter
3
Control Group
The Control Group Module (CtrlGrp) provides the Human Machine Interface
(HMI) and the main control circuit, for a group of machines, or devices that
are started and stopped as an entire group. The term Group, refers to the
Asset Code (AC) definition, with the assumption that one AC Group can be
controlled by one CtrlGrp, but also may be controlled by several CtrlGrps.
The CtrlGrp accepts commands from FactoryTalk View SE. Local operator
stations, with separate start/stop pushbuttons, can also be connected. It
further accepts (for example, power failure input) or stop interlocks and it
provides outputs for the operator station, or the control room indication (for
example, mimic, alarm indication), as well as for start warning and motor
sequence control.
The CtrlGrp automatically receives/sends data from/to other modules (for
example, local enable or alarm feedback of motor modules), through its Bus
interface, in order to reduce programming workload, as well as programming
errors. The release of alarms within a group, depends on the status of the
group. If the group is active, then messages from the related modules are sent
to FactoryTalk View SE.