Rockwell-automation 1771-DB BASIC MODULE Manual de usuario descargar pdf (Pagina 212)

100

101

Chapter

Call Routines 0–68

12 -22

Important: This call requires the BASIC module jumper JW5 to be in 16

point mode (page 1 -7).

Use CALL 32 to allow the PLC processor to interrupt the BASIC module.

When enabled the BASIC module monitors PLC output bit 16 for a 0 to 1

transition at the end of every BASIC line and generates the interrupt if the

bit is set. The PLC ladder logic should then clear the PLC output bit 16.

Interrupts are disabled when the BASIC module is in Command mode.

When you enter Run mode CALL 32 is disabled until you enable it.

You must re-execute CALL 32 every time you enter Run mode.

Input and Output Arguments

This routine has one input and no output arguments. The input argument is

the beginning line number of the interrupt routine. The program jumps to

this line number when PLC output bit 16 is set. The BASIC module

detects this transition automatically and jumps to the interrupt routine.

If you execute a RETI (page 11 -33) within the interrupt routine, you return

to the point in the program before the interrupt occurred. Line number 0

disables the processor interrupt.

Syntax

PUSH beginning line number of interrupt routine

CALL

Example

1 REM EXAMPLE PROGRAM

10 REM ENABLE PROCESSOR INTERRUPTS

20 PUSH 1000

30 CALL 32

>1000

(BEGINNING OF THE PROCESSOR INTERRUPT ROUTINE)

1050 RETI

Sample Ladder Logic

( )

O:001

CALL

32: Enable/Disable

Processor Interrupt

1 2 ... 207 208 209 210 211 212 213 214 215 216 217 ... 393 394

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