YOKOGAWA F3RS22-0N, User Manual

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4-9
IM 34M6H21-01E 2nd Edition : Aug, 2001-00
no ON ERROR branching, check the status register in the program.
Figure 4.1 Time Chart for Complete Return Type of Access
Figure 4.2 Time Chart for Proceeding Type of Access
z
TRANSFER Procedure
The program procedure for input and output using TRANSFER is explained below. In
both cases, input/output buffers and input/output variables are required in the user area.
- Output Procedure
Data is output to the input/output buffer within the user area. Then, TRANSFER is
started. Common variables cannot be used in the input/output buffer.
10 DEFINT I
20 DIM BUFF$256,A$256
30 A$=“ABCDE”
40 ASSIGN RS22=5
50 OUTPUT BUFF$;A$ … Output data to buffer
60 ON EOT 5,2 GOSUB RSEOT@ … Specify interrupt destination
70 TRANSFER 5,2FORMAT FROM BUFF$ … Initiate TRANSFER
Other processing
1000 RSEOT@ STATUS 5,2,4;IST
1010 IF IST<>0 THEN
1020 PRINT“TRANSFER ERROR”
1030 ELSE Interrupt processing for end of TRANSFER
1040 PRINT“TRANSFER END”
1050 ENDIF
1060 RETURN
CPU
Free CPU
Busy CPU
Free CPU
Busy
Time
Time
Data Dat
a
OUTPUT ENTER
BASIC program
in WAIT state
BASIC
program in
WAIT state
CPU
Free CPU
Free CPU
Busy
Transmission
destination
CPU
Busy
Transmission
destination
Time
Time
&CVC
ON EOT
TRANSFER FROM TRANSFER INTO
*
Time until data
arrives from
remote
equipment
ON EOT
&C
VC
Transmission
destination
Transmission
destination
*
Time until data
arrives from
remote
equipment