Yokogawa DR240 Manual do Utilizador descarregar pdf (Página 105)

8-7

IM DR231-11E

Sample Program

8.3 RS-422-A/RS-485 Sample Programs

This section describes sample program for a system using PC9801 series (NEC) with the RS-422-A/

RS-485 interface. We hope that these samples will aid you in creating your own program.

Configuration

Model : NEC PC9801 series

Language : N88-BASIC (Standard programming language on the PC9801 series)

Wiring system : four-wire system (both four-wire and two-wire systems are introduced in this

manual for the ASCII output of the measured data).

Setting the RS-422-A/RS-485 Parameter

Baud rate : 9600

Data length : 8

Parity : Even

Stop bit : 1

Address : 01

Setting the Personal Computer

Be careful when receiving BINARY data that the received data does not overrun the capacity of the

receive buffer in the personal computer which may be small as 255 bytes in some case.

Output the Setting Data

Read out the setting data from DR series, display them on CRT of the personal computer, and save

them to floppy disk.

10 ‘

20 OPEN “COM1:E81N” AS #1

30 OPEN “TS1.DAT” FOR OUTPUT AS #2

40 ‘

50 PRINT #1,CHR$(&H1B)+”O 01"

60 LINE INPUT #1,D$ :PRINT D$

70 PRINT #1,”TS1"

80 LINE INPUT #1,D$ :PRINT D$

90 PRINT #1,CHR$(&H1B)+”T”

100 LINE INPUT #1,D$ :PRINT D$

110 PRINT #1,”LF001,010"

120 LINE INPUT #1,D$

130 PRINT D$

140 PRINT #2,D$

150 IF LEFT$(D$,2)<>”EN” THEN GOTO 120

160 ‘

170 PRINT #1,CHR$(&H1B)+”C 01"

180 LINE INPUT #1,D$ :PRINT D$

190 CLOSE

200 END

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 120 121

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Yokogawa DR240 Manual do Utilizador Página 105

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