Mitsubishi Electric MELSEC Q Series, User Manual

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8 - 12
Chapter 8 HPR Control
8.2.5 HPR method (3): Count method 2) [RJ010 mode]
The following shows an operation outline of the HPR method "count method 2)".
The "count method 2)" method is effective when a "zero signal" cannot be received.
(Note that compared to the "count method 1)" method, using this method will result in
more deviation in the stop position during machine HPR.)
Operation chart
1)
The machine HPR is started.
(The machine begins the acceleration designated in "[Pr.51] HPR acceleration time selection", in the
direction designated in "[Pr.44] HPR direction". It then moves at the "[Pr.46] HPR speed" when the
acceleration is completed.)
2)
The machine begins decelerating when the proximity dog ON is detected.
3)
The machine decelerates to the "[Pr.47] Creep speed", and subsequently moves at that speed.
4)
The command from the Simple Motion module will stop and the machine HPR will be completed when the
machine moves the movement amount set in "[Pr.50] Setting for the movement amount after proximity dog
ON" from the proximity dog ON position.
Md.21 Feed machine value
t
V
ON
OFF
ON
OFF
ON
ON
OFF
0
OFF
Pr. 46 HPR speed
Pr. 47 Creep speed
Pr.50 Setting for the movement amount
after proximity dog ON
Md.34 Movement amount after proximity dog ON
Leave sufficient distance from the HP
to the proximity dog OFF.
Machine HPR start
(Positioning start signal)
HPR
Inconsistent
Value the machine moved is stored
Inconsistent
Md.34 Movement amount
after proximity dog ON
Md.20 Feed current value
Md.26 Axis operation status
Standby Standby
Value of .
HP address
HPR request flag
( Md.31 Status : b3)
HPR complete flag
( Md.31 Status : b4)
1
1
Proximity dog
Fig. 8.7 Count method 2) machine HPR