Rockwell-automation 1771-DB BASIC MODULE Instrukcja Użytkownika Pobierz pdf (Strona 215)

100

101

Chapter

Call Routines 0–68

12 -25

4. The ladder logic program of the PLC processor retrieves the data

from the input image table and performs a block transfer

PLC Processor

Block Transfer

BASIC Module

PLC Backplane

PRT2

PRT1

5. The BASIC module resets the bit in the PLC input image table on the

same end of the scan cycle in which the block transfer is performed.

Reset Input Image Table

Bit 10 or 12

PLC Processor

BASIC Module

PLC Backplane

PRT2

PRT1

Data transfers continue until you re-execute the call for the port with

different input parameters. If this occurs, the previous CALL 33 for the

port is automatically disabled and the new CALL 33 takes effect.

You cannot execute multiple CALL 33s for the same port in parallel.

However, you can activate PRT1 and PRT2 simultaneously by issuing

separate CALL 33s.

Input and Output Arguments

This routine has seven input arguments and one output argument.

Argument Description Page

input 1

source port of BASIC module 12 -26

input 2 maximum number of 8-bit characters you want to copy

from the BASIC serial port to the destination file

12 -26

input 3 decimal value of the ASCII character delimiter 12 -26

input 4 selection of the destination buffer 12 -26

input 5 always 1 12 -27

input 6 the string number 12 -27

input 7 byte swap selection 12 -27

output 1 call status 12 -27

1 2 ... 210 211 212 213 214 215 216 217 218 219 220 ... 393 394

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