Panasonic FP2 User Manual page 14

Transmission Speed and Transmission Format
Start code
The start code designates one frame of the data being transmitted as the start of the
data. If the start code is made valid in the transmission format settings, the data received
between the STX and the next end code is considered to be one frame.
FP2
SDU
SD RD ERR SD RD ERR AL
COM.1 C OM.2
COM.1(RS232C)
COM.2(RS232C)
With the serial data unit, the start code can be set to either "Invalid" or "Valid".
xii
1 frame
Start code
Data
(STX)
One frame extends from the start code to
the end code.
End code
Data − − − − − − −
(ETX)
FP2 Serial Data Unit
External
device