Mitsubishi MELIMP Series Instruction Manual page 131

(6) Program example (Switching the operation mode to communication operation)
10 OPEN "COM1 : 9600,E,8,2,HD" AS #1
20 COMST1,1,1:COMST1,2,1
30 ON COM(1)GOSUB REC
40 COM(1)ON
50 D$= "01FB10002"
60 S=0
70 FOR I=1 TO LEN(D$)
80 A$=MID$(D$,I,1)
90 A=ASC(A$)
100 S=S+A
110 NEXTI
120 D$=CHR$(&H5)+D$+RIGHT$(HEX$(S),2)
130 PRINT#1,D$
140 GOTO 50
1000 REC
1010 IF LOC(1)=0 THEN RETURN
1020 PRINT "RECEIVE DATA"
1030 PRINT INPUT$(LOC(1),#1)
1040 RETURN
General flowchart
Line number
Input file
10
initial setting
to
40
50
Transmission
data processing
Data setting
to
Sum code
calculation
Data
transmission
140
The drive unit does not accept data from the computer if it is in error. Hence, always
insert a data error retry program in the user program.
Since the communication of any data, e.g. run command, monitor, is started from
NOTICE
the computer, the drive unit will not return data without the computer's command.
For monitoring, therefore, design the program to cause the computer to provide a
data read request as required.
Initial setting of input file
: Communication file opening
: Circuit control signal (RS (ON in data-receivable
status), ER (unit ready signal)) ON/OFF setting
: Interrupt definition at data receive
: Interrupt enable
Transmission data setting
Sum code calculation
: Addition of control and sum codes
Interrupt data receive
: Interrupt occurrence at data receive
1000
Receive data
processing
Interrupt to
Data import
Screen display
1040
8-44
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8 PARAMETER FUNCTIONS
Data transmission