Panasonic FP0R User Manual page 148

Communication
System register settings:
In order to use the data in the receive buffer, define a global variable having the same starting
address and capacity. In this example, the starting address is 200 (VAR_GLOBAL
awReceiveBuffer) and the receive buffer capacity is 5 (ARRAY [0..4] OF WORD).
GVL
POU Header
147