Mitsubishi Electric Melsec FX Series Beginners Manual page 53

MELSEC FX PLC positioning
Fig. 4-6: Program example (4)
To stop the positioning operation, be sure to insert the stop contact before the positioning instruction so
that STL instruction cannot be turned off (reset) until "pulse output monitor" flag (M8340 or M8147 (for
Y000)) is turned off.
To prevent simultaneous activation of positioning instructions, the instruction activation timing should be
delayed by 1 scan time.
Number
³
·
»
¿
´
Tab. 4-9: Description of the program example in fig. 4-6
FX Positioning Control Systems
X004
M52
FNC 159
DDRVA
Waiting for Stop
1 scan time command
M8029
"Execution completion" flag
Use this for FX , FX , FX , FX and FX
3G 3GC 3GE 3S
M52
M8340
Y000 Waiting for
Outputting 1 scan time
Use this for FX and FX PLCs
1S 1N
M8147 M52
Y000 Waiting for
Outputting 1 scan time
M8000
RUN monitor
Description
Positioning in reverse rotation direction
Moves to absolute position 100 using the drive to absolute instruction. (Y004 = OFF)
"Reverse rotation positioning completion" flag
Ends the positioning operation in the reverse rotation direction. (Self-reset)
Waiting for 1 scan time
Learning to Use the FX Family for Positioning Control
STL
K100 K100000 Y000
Designation Output Pulse
of absolute pulse output
position frequency destination
number
SET
PLCs
3U(C)
RST
RST
³
S21
·
Y004
Rotation
direction
signal
»
M12
¿
S21
¿
S21
´
M52
RET
END
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