Conveyor with start/stop, jam detection and fault reset
=======================================================

Operation Manual, Appendix G.2 - the task, the I/O list, design notes and a
step-by-step test in the simulator are there.

This project runs in the simulator as it is: its IO is one simulated device,
DeskIO (%I 8 bytes, %Q 8 bytes), which keeps
every address the program declares. Drive the inputs by forcing them
(Online variable table, Prepared value, F7).

On a real controller, replace DeskIO with the real IO devices (Chapter 7) and
check each address, or bind the names as channel aliases (Chapter 11).
