Rockwell Automation 1746-BAS BASIC LANGUAGE - Manual (Page 193)

Publication 1746-RM001A-US-P
Input Functions 13-3
2. 2. 2. 2. The module places the byte count of the valid data into the lower byte of the
first available word of the destination buffer. The upper byte of the first
available word is not used.
3. 3. 3. 3. The module sets the input file word 0, bit 8 or bit 9 to inform the SLC
processor that valid data is available. Bit 8 indicates that data is available from
port 1 and bit 9 indicates that data is available from port 2.
4. 4. 4. 4. The ladder logic program of the SLC processor gets the data from the file. The
ladder logic program sets the output file word 0, bit 8 or bit 9 to inform the
module that data was received.
5. 5. 5. 5. The module resets the input file word 0, bit 8 or bit 9 on the same end of scan
cycle in which the output file word 0, bit 8 or bit 9 was set.
SLC Processor Input
Data file or M1 File
SLC Backplane BASIC or BASIC-T Module
DATA
BYTE
COUNT
SLC Processor Input
Data file or M1 File
SLC Backplane BASIC or BASIC-T Module
DATA
BYTE
COUNT
PORT PRT1
PORT PRT1
SLC Processor SLC Backplane BASIC or BASIC-T Module
PORT PRT1
PORT PRT1
Output File
Word 0, Bit 8 or
Bit 9 is set
SLC Processor SLC Backplane BASIC or BASIC-T Module
PORT PRT1
PORT PRT1
Reset Input File
Word 0, Bit 8 or
Bit 9