FLAG SCREEN


FLAG SCREEN

Flags (F[ ])are internal I/O ports that can be read and set. They are not connected to any actual I/O device, they are like a Boolean type variable.

The value of flags can be recovered by Power Failure Recovery function (HOT Start). It is the same as the other output ports, for example DO.

The following conditions set all Flags to OFF:

  • COLD start

  • CONTROL start

  • INIT start

  • I/O assignment is changed, even though in HOT start.

  • I/O configuration is changed, even though in HOT start.

DI, DO, UI, UO, GI and GO can be assigned to flags by configuring them as Rack 34, Slot 1, Start point 1-1024.

When UI/UO are assigned to flags, program execution can be controlled by TP program or Background Logic. For Example:

Rack	 Slot  Start Pt.
UI[1-18]	 34	 1	    1

In this case, when F[6] is changed from ON to OFF, UI[6:START] is changed from ON to OFF, and the selected program is executed.