Mitsubishi Electronics QD75D, QD75P Speed-position switching signal setting, Changing the position control movement amount

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MELSEC-Q
9 MAJOR POSITIONING CONTROL
Speed-position switching signal setting
The following table shows the items that must be set to use the externa l command
signals (CHG) as speed-position switching signals.
Buffer memory address
Setting item Setting
value Setting details Axis 1 Axis 2 Axis 3 Axis 4
Pr.42
External
command
function
selection
2Set the "2: speed-position and
position-speed switching
requests". 62 212 362 512
Cd.8 External
command
valid 1Set "1: Validate external
command". 1505 1605 1705 1805
Refer to Section 5.2 "List of parameters" and Section 5.7 "List of control data" for information on the
setting details.
Changing the position control movement amount
In "speed-position switching control (INC mode)", the position c ontrol movement
amount can be changed during the speed control section.
(1) The position control movement amount can be changed during the speed
control section of speed-position switching control (INC mode).
A movement amount change request will be ignored unless issued during the
speed control section of the speed-position switching control (INC m ode).
(2) The "new movement amount" is stored in " Cd.23 Speed-position switching
control movement amount change register" by the sequence program during
speed control.
When the speed-position switching signal is turned ON, the movem ent amount
for position control is stored in " Cd.23 Speed-position switching control
movement amount change register".
(3) The movement amount is stored in the " Md.29 Speed-position switching
control positioning amount" of the axis monitor area from the point where the
control changes to position control by the input of a speed-position s witching
signal from an external source.
t
Movement amount
Speed-position switching signal
ON
OFF
Speed control Pos it ion co ntr ol
Position control start
Speed-position switching control (INC mode) start
0P2
OFF
Speed-position switching latch flag ON
P3
P2 becomes the position control movement amoun
t
Cd.23 Speed-position switching control,
movement amount change register
Md.31 Status : b1
change possible
Setting after the speed-position
switching signal ON is ignored
Fig. 9.15 Position control movement amount c hange timing