Rockwell Automation 1746-BAS BASIC LANGUAGE - Manual (Page 197)

Publication 1746-RM001A-US-P
Input Functions 13-7
Example
>1 REM EXAMPLE PROGRAM
>10 REM ENABLE CALL 22 INTERRUPTS
>20 PUSH 1 : REM PRT1 ACTIVE FOR CALL 22
>30 PUSH 10 : REM RECEIVING 10 BYTES OF DATA MAXIMUM
>40 PUSH 13 : REM USED AS TERMINATION CHARACTER
(13 DECIMAL)
>50 PUSH 1 : REM SEND DATA TO M1 FILE
>60 PUSH 0 : REM OFFSET INTO M1 FILE
>70 PUSH 0 : REM STRING NUMBER - NOT USED
>80 PUSH 1 : REM BYTE SWAPPING ENABLED
>90 CALL 22
>100 POP S : REM STATUS OF CALL 22 SETUP
>110 IF (S<>0) THEN PRINT “UNSUCCESSFUL CALL 22 SETUP”
>120 END
Below is a sample ladder logic program for CALL 22. The module is located in slot
1 of the SLC chassis. At rung 0000, copy data from the M1 file when the
handshake bit (I:1.0/8) is set by the module. The SLC sets handshake bit (O:1.0/8)
once the data has been copied out of the M1 file. This informs the module to turn
off (I:1.0/8). The first word of the M1 file contains the byte count and this word is
not included in the data byte count. A maximum of 10 bytes of data is expected in
this example.
0000
I:1
8
COP
Copy File
Source
#M1:1.0
Dest #N7:0
Length 6
L
O:1
8
0001 END
Handshake Bit from
Module to SLC Processor
Handshake Bit from
SLC Processor to Module