Publication 1785-UM012D-EN-P - July 2005
Using Main Control Programs 16-5
Monitoring MCPs
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.
IMPORTANT
If you plan to use SFC subcharts, make sure you define
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.
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