Mitsubishi Electric CR800 Series Instruction Manual page 180

15 Maintenance of robot program
P_TrkPixel
[Function]
Refer to the workpiece pixel position read from the tracking buffer when "TrkChk", "TrkWait" command is
executed.
[Format]
[Referencing]
<Position type variable> = P_TrkPixel(<Condition number>)
[Terminology]
< Condition Number [Integer]>
Specify the condition number corresponding to the tracking.
Setting range: 1 to 8
<Position variable [Position]>
Return the workpiece pixel position read from the tracking buffer corresponding to the specified condition
number.
[Reference program]
M_TrkBuf(1) = 1
・・・・・
TrkChk 1, PSave, PWait, *LTRST 'Check the workpiece of the specified tracking buffer.
・・・・・
Pixel = P_TrkPixel(1)
[Explanation]
(1) You can confirm the workpiece pixel position read from the tracking buffer when "TrkChk", "TrkWait"
command is executed.
(2) If there is no data in the tracking buffer, the data will be cleared.
(3) You can omit the step to specify <Condition number>.When it is omitted, condition number will be treated
as "1."
(4) Number which you can enter to specify <Condition number> is an integer in the range of "1" to "8." Entering
anything else causes L3110 (Argument value range over) error to occur.
(5) If you execute the writing to "P_TrkPixel", L3210 (This variable is write protected) error occurs.
15-168 MELFA-BASIC V or MELFA-BASIC VI instruction
' Tracking buffer corresponding to the condition number 1 uses number 1.
'Substitute the workpiece pixel position read from the tracking buffer 1.