Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 166)

Chapter
Statements 11
11 -14
Use the GOTO statement to cause BASIC to transfer control to the line
number you specify. If line number you specify does not exist, the
message
ERROR: INVALID LINE NUMBER is printed to the console device
and the BASIC module enters the Command mode.
Unlike the RUN command (page 10 -19), if you execute the GOTO
statement in the Command mode it does not clear the variable storage
space or interrupts. However, if you execute the GOTO statement is in the
Command mode after you edit a line, the module clears the variable
storage space and all BASIC evoked interrupts.
Syntax
GOTO ln num
Example
>1 REM EXAMPLE PROGRAM
>50 GOTO 100
If line 100 exists, this statement causes execution of program to resume at
line 100.
Use the IDLE statement to force the BASIC module to wait until an
interrupt occurs (i.e., ONTIME, ONERR, etc.). Program execution halts
until an ONTIME condition is met. The ONTIME (page 11 -25) interrupt
must be enabled before executing the IDLE command or else the BASIC
module enters a wait forever mode. Ctrl
+ C (page 10 -4) exits the
IDLE command if Ctrl
+ C is enabled. (See CALL 18, page 12 -11).
Important: Do not use IDLE while executing background calls (page
7 -6). Background calls do not execute properly if IDLE is running.
Syntax
IDLE
Example
>10 TIME = 0
>20 CLOCK1
>30 ONTIME 2,70
>40 IDLE
>50 PRINT “END OF TEST!!!”
>60 END
>70 PRINT “TIMER INTERRUPT AT - ”,TIME,“SECONDS.”
>80 RETI
READY
>RUN
TIMER INTERRUPT AT - 2.005 SECONDS.
END OF TEST!!!
GOTO
IDLE