6-8
• Please be aware that the control flag “in progress” may change while a scan is being carried out. To
prevent multiple read access to this special internal relay, you should generate a copy of it at the
beginning of the program.
• When the control flag for a channel turns on, another instruction using that same channel cannot be
executed.
• Executing circular interpolation control instruction F176 sets the circular interpolation in progress flag
(special internal relay: R904E), and that state is maintained until the target value is achieved. During
this time, other pulse output instructions (F171 to F176) cannot be executed.
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