Yokogawa DR240 - Manual (Page 108)

8-10 IM DR231-11E
Output the Measurement Data (ASCII Code, two-wire)
Read out the measurement data by ASCII code from DR series, display on CRT of the personal
computer, and save to floppy disk.
10 ‘
20 OPEN “COM1:E81N” AS #1
30 OPEN “TS0ASC.DAT” FOR OUTPUT AS #2
40 OUT &H32,&H5
50 ‘
60 D$=CHR$(&H1B)+”O 01"
70 GOSUB *RPRINT :GOSUB *RRECIVE :PRINT D$
80 D$=”TS0"
90 GOSUB *RPRINT :GOSUB *RRECIVE :PRINT D$
100 D$=CHR$(&H1B)+”T”
110 GOSUB *RPRINT :GOSUB *RRECIVE :PRINT D$
120 ‘
130 D$=”FM0,001,010" :GOSUB *RPRINT
140 GOSUB *RRECIVE
150 PRINT D$
160 PRINT #2,D$
170 IF MID$(D$,2,1)<>”E” GOTO 140
180 ‘
190 D$=CHR$(&H1B)+”C 01" :GOSUB *RPRINT :GOSUB *RRECIVE
200 CLOSE
210 END
220 ‘
230 ‘
240 *RPRINT
250 OUT &H32,&H25
260 FOR K=1 TO 1000 :NEXT K
270 PRINT #1,D$
280 IF(INP(&H32) AND &H4) THEN OUT &H32,&H5 ELSE 280
290 RETURN
300 ‘
310 *RRECIVE
320 D$=””
330 INCHR$=INPUT$(1,#1)
340 D$=D$+INCHR$
350 IF ASC(INCHR$)<>&HA THEN GOTO 300
360 PRINT D$
370 RETURN
• This program is designed for the converter using RS (RTS) for send control.
• BIT 5 is the RS (RTS) control BIT in the XX value of “OUT &H32,&HXX” in the program. Bits
other than BIT 5 may be different in other applications.
• Comments on the program are indicated below.
Line 40 Set RS (RTS) to FALSE and turn the send control OFF.
Line 250 Set RS (RTS) to TRUE and turn the send control ON.
Line 260 Insert a wait before sending data. This value need to be adjusted depending on the
PC. This wait time is usually not necessary unless the PC is extremely fast and the
data sent from the DR side collides with the data sent by the PC side.
Line 280 On the send complete indication from the PC (TxEMP is TRUE), set RS (RTS) to
FALSE and turn the send control OFF.
Line 310 This subroutine accurately reads up to LF.
8.3 RS-422-A/RS-485 Sample Programs