Using Main Control Programs

16-5

 

 

Monitoring MCPs

 

If you plan to use SFC subcharts, make sure you define

IMPORTANT

something for MCP A - even an empty ladder file is

 

 

 

sufficient. If a MCP is undefined, the controller faults on

 

the second SFC scan with major fault code 71 SFC

 

subchart is already executing.

 

 

The program scan times for each MCP are stored in the controller status file, including the previous and maximum scan time. The status file also stores the cumulative scan time, S:8 (the scan time for one complete pass through all MCPs) and the maximum cumulative scan time, S:9.

Publication 1785-UM012D-EN-P - July 2005

Page 257
Image 257
Bradley Smoker PLC-5 user manual Monitoring MCPs