Panasonic FP0H User Manual page 65

 Special relays / special data registers
Reception done flag in general-purpose
communication
Transmission done flag in general-
purpose communication
(Note): The Nos. in brackets indicate devices that are compatible with existing FP-X / FPΣ.
KEY POINTS
• 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.
7.3 Flag Operations in Transmission / Reception
COM0 COM1
R9132 (R903E) R913A (R9038)
R9133 (R903F) R913B (R9039)
COM2
R9142 (R9048)
R9143 (R9049)
7-7