DMC-18x2
Chapter 7 Application Programming • 113
CR 1500,90,-180
REM HALF CIRCLE MOTION
VE
REM END VECTOR SEQUENCE
BGS
REM BEGIN SEQUENCE MOTION
EN
REM END OF PROGRAM
The REM statements will be removed when the program is downloaded to the controller.
Executing Programs - Multitasking
The DMC-18x2 can run up to 8 independent programs simultaneously. These programs are called
threads and are numbered 0 through 7, where 0 is the main thread. Multitasking is useful for executing
independent operations such as PLC functions that occur independently of motion.
The main thread differs from the others in the following ways:
1. Only the main thread, thread 0, may use the input command, IN.
2. When input interrupts are implemented for limit switches, position errors or command errors, the
subroutines are executed as thread 0.
To begin execution of the various programs, use the following instruction:
XQ #A, n
Where n indicates the thread number. To halt the execution of any thread, use the instruction
HX
n
where n is the thread number.
Note that both the XQ and HX commands can be performed by an executing program.
The example below produces a waveform on Output 1 independent of a move.
#TASK1 Task1
label
AT0
Initialize reference time
CB1
Clear Output 1
#LOOP1 Loop1
label
AT 10
Wait 10 msec from reference time
SB1
Set Output 1
AT -40
Wait 40 msec from reference time, then initialize reference
CB1
Clear Output 1
JP #LOOP1
Repeat Loop1
#TASK2 Task2
label
XQ #TASK1,1
Execute Task1
#LOOP2 Loop2
label
PR 1000
Define relative distance
BGX Begin
motion
AMX
After motion done
WT 10
Wait 10 msec
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Содержание DMC-18 2 Series
Страница 3: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 5: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 11: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...