Rockwell-automation MMCL Using the Mining, Mineral, and Cement Library Manuale Utente Pagina 20

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Publication RA-UM002B-EN-P - November 2010
20 Rules and Recommendations
Typical Add-On Instruction Function Call
Each MMCL Add-On Instruction function has three data structures:
All direct Inputs/Outputs are specified by the Backing Tag (instance
name of Add-On Instruction).
The ModuleData Tag is referenced by the Add-On Instruction, this data
may be read and written by other modules/devices. It contains HMI
data (Sta, Cmd, and Val) or Parameters (Par).
The Global Tag is used by all modules and contains common
Parameters or, for example, the interface for the Startup Warnings
(Horn/Flash) and Alarm Gong.
Add-On Instruction Module Data Structure
Add-On Instruction
Backing Tag
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