Panasonic FP0H Series User Manual

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■ Special relays / special data registersCOM0 COM1 COM2Reception done flag during general-purpose communication R9132 (R903E) R913A (R9038) R9142 (R9048)Transmission done flag during general-purpose communication R9133 (R903F) R913B (R9039) R9143 (R9049)(Note 1) The Nos. in brackets indicate devices that are compatible with existing FP-X / FPsigma.● 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 apossibility of different statuses existing within the same scan.) As a protective measure, replaceit with an internal relay at the beginning of the program.7.3.2 When the Header is Set to “STX” and the Terminator to “ETX”■ When receiving data: The reception done flag, the transmission done flag, andthe F159 (MTRN) instruction are related as follows:● The data is stored in the receive buffer in sequential order. When the header is received, thenumber of bytes received is cleared, and the address (write pointer) in the receive buffer isreset to the initial address.● Reception is disabled when the reception done flag R913A is ON.● When F159 (MTRN) is executed, the number of receive bytes is cleared, and the address(write pointer) in the receive buffer is reset to the starting address.7.3 Flag Operations in Transmission / ReceptionWUME-FP0HCOM-06 7-11