Precautions When Creating P Point Control Programs; Precautions Concerning The Set Value Change Confirmation Flag X_A - Panasonic FPG Series Technical Manual

FP∑ Positioning Unit P Point Control: Multi - Stage Acceleration / Deceleration

7.4 Precautions When Creating P Point Control Programs

7.4.1 Precautions Concerning the Set Value Change Confirmation Flag X_A

The set value change confirmation flag is turned ON and OFF at the timing noted below, so an interlock
should be applied to prevent the shared memory or other data from being overwritten at the same timing.
Conditions for turning the flag from OFF to ON
-This flag goes ON when P point control or E point control is initiated.
-It goes ON at the point when the next data can be written.
Conditions for turning the flag from ON to OFF
-This flag goes OFF when pulse output is completed after P point control or E point control is initiated.
-It goes OFF when the shared memory write instruction F151 is executed, and any type of data is written
to the shared memory of the positioning unit.
The interlock should be applied to each circuit, so that F151 instruction cannot be executed and the set
value change confirmation flag X_A cannot be rewritten under any other conditions.
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