Panasonic FP-XH Series User Manual page 76

7.3 Flag Operations in Transmission / Reception
● Note that the reception done flag (R913A) changes even while a scan is in progress.
(e.g., if the reception done flag is used multiple times as an input condition, there is a possibility
of different statuses existing within the same scan.)
As a protective measure, replace it with an internal relay at the beginning of the program.
7-10 WUME-FPXHCOMG-02