Mitsubishi Electronics FX0N-232ADP manual Communication format D8120 bit mapping

●For data transmission to be effective it is necessary to match the communication format between the product and the RS232C device, such as Baud rate and parity.

Communication format D8120 (bit mapping)

Bit	Description	0(OFF)		1(ON)
b 0	Data length	7bit		8bit
b 1		(00)	: None
	Parity	(01)	: Odd
b 2
		(11)	: Even
b 3	Stop	1bit		2bit
		(0011)	:	300
b 4		(0100)	:	600
b 5	Baud rate	(0101)	:	1,200
b 6		(0110)	:	2,400
	(bps)
		(0111)	:	4,800
b 7
		(1000)	:	9,600
		(1001)	: 19,200

Bit	Description	0(OFF)	1(ON)
b 8	Header	None	D8124 *1
b 9	Terminator	None	D8125 *2
b10	Control line	None	H/W
b11	Mode	Ordinary	Single line
	(Control line)	mode	mode
b12
b13	Not used	- - -	- - -
b14
b15

*1 The default value is STX (02H: changeable).

*2 The default value is ETX (03H: changeable).

●The communication format is set by special data register D8120.

Setting the communication format using D8120 is effective only at the time the RS instruction is driven, and therefore any change after driving is not actually accepted.

●An example of setting D8120 is shown below.

M8002 [MOV H138F D8120]

Setting input

b15 b0

H138F= 0001 0011 1000 1111(binary) The settings for the above program are as right.

Data length	8 bit
Parity	Even
Stop	2 bit
Baud rate	9,600
Header	Used
Terminator	Used
Control line	H/W
Mode	Ordinary mode

●The control line is set by b10.

b10 = 0 :No hardware handshaking.Send and receive are controlled by software protocol.

b10 = 1 :Hardware handshaking.Signal lines ER(DTR)and DR(DSR)are used to control send and receive of data.

		When sending
b 10	1	Pin No.
b 11	0	SD(TXD)

H/W.

Ordinary ER(DTR) mode

DR(DSR)

b 10	1	Pin No.
b 11	1	SD(TXD)

H/W.

Single line RD(RXD) mode

ER(DTR)

		When receiving
		Pin No.
Send	Data	RD(RXD)	Receive	Data

ER(DTR)

DR(DSR)

Send

Data

Receive

Data