BASIC commands
PROGRAMMING MANUAL
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3.2.307 VRSTRING
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3.2.308 WA
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3.2.309 WAIT IDLE
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Example
In the following example, the value 1.2555 is placed into VR variable 15. The
local variable
val
is used to name the global variable locally:
val = 15
VR(val) = 1.2555
Example
A transfer gantry has 10 put down positions in a row. Each position may at
any time be full or empty. VR(101) to VR(110) are used to hold an array of ten
1 ' s and 0 ' s to signal that the positions are full (1) or empty (0). The gantry
puts the load down in the first free position. Part of the program to achieve this
would be as follows:
movep:
MOVEABS(115) ' Move to first put down position
FOR VR(0) = 101 TO 110
IF (VR(VR(0)) = 0) THEN GOSUB load
MOVE(200) ' 200 is spacing between positions
NEXT VR(0)
PRINT "All positions are full"
WAIT UNTIL IN(3) = ON
GOTO movep
load: ' Put load in position and mark array
OP(15,OFF)
VR(VR(0)) = 1
RETURN
The variables are backed up by a battery so the program here could be
designed to store the state of the machine when the power is off. It would of
course be necessary to provide a means of resetting completely following
manual intervention.
Example
loop: ' Assign VR(65) to VR(0) multiplied by axis 1 measured position
VR(65) = VR(0)*MPOS AXIS(1)
PRINT VR(65)
GOTO loop
See also
CLEAR_BIT
,
READ_BIT
,
SET_BIT
,
TABLE
.
Type
System command
Syntax
VRSTRING(vr_start)
Description
Combines the contents of an array of VR() variables so that they can be
printed as a text string. All printable characters will be output and the string
will terminate at the first null character found. (i.e. VR(n) contains 0)
Arguments
•
vr_start
number of first VR() in the character array.
Example
PRINT #5,VRSTRING(100)
See also
N/A
Type
System command
Syntax
WA(time)
Description
The
WA
command pauses program execution for the number of
milliseconds specified for time. The command can only be used in
a program.
Arguments
•
time
The number of milliseconds to hold program execution.
Example
The following lines would turn ON output 7 two seconds after turn-
ing off output 1.
OP(1,OFF)
WA(2000)
OP(7,ON)
See also
N/A
Type
System command
Syntax
WAIT IDLE