Pepper-computer Modular Computers RS485 Manual do Utilizador descarregar pdf (Página 293)

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101

SMART I/O User’s Manual

Chapter 6 Communications Modules

char_length : This represents the number of data-bits within a

transmitted character and may be 5, 6, 7 or 8

stop_bits : The number of stop-bits supported by the communi-

cation protocol may be :

0 for 1 stop-bit

1 for 1.5 stop-bits or

2 for 2 stop-bits

parity : The parity bit of a data string may be :

0 for no parity

1 for odd parity or

2 for even parity

baud_rate : The board rates supported by the SM-RS232 are

standard values up to 19200 baud

xon_char : XON character; typically set to 11 hex

xoff_char : XOFF character: typically set to 13 hex

eor_char : Character to be used to detect the end of record; is

usually set to 0D hex.

The input and output devices are represented by keyboard and display

respectively.

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