9 - 97
Chapter 9 Major Positioning Control
Current feed value during speed-position switching control (INC mode)
The following table shows the "
Md.20
Current feed value" during speed-position
switching control (INC mode) corresponding to the "
Pr.21
Current feed value
during speed control" settings.
Pr.21 Current feed value during
speed control" setting
Md.20 Current feed value
0: Do not update current feed value
The current feed value at control start is maintained during speed
control, and updated from the switching to position control.
1: Update current feed value
The current feed value is updated during speed control and position
control.
2: Zero clear current feed value
The current feed value is cleared (set to "0") at control start, and
updated from the switching to position control.
t
0
Updated from 0
t
V
t
Position control
Maintained
Updated
Speed control
Position control
Speed control
Position control
Speed control
Updated
(a) Current feed value not updated
(b) Current feed value updated
(c) Current feed value zero cleared
V
V
Current
feed value
Current
feed value
Current
feed value
Switching time from speed control to position control
There is 1ms from the time the speed-position switching signal is turned ON to the
time the speed-position switching latch flag (
Md.31
Status: b1) turns ON.
Speed-position switching signal
OFF
ON
OFF
ON
1ms
Speed-position switching latch flag
Speed-position switching signal setting
(1) The following table shows the items that must be set to use the external
command signals [DI] as speed-position switching signals.
Buffer memory address
Setting item
Setting
value
Setting details
QD77MS2
QD77MS4
QD77MS16
Pr.42
External
command
function selection
2
Speed-position, position-speed
switching request.
62+150n
Cd.8
External
command valid
1
Validates an external
command.
1505+100n 4305+100n
Cd.45
Speed-position
switching device
selection
0
Use the external command
signal for switching from speed
control to position control.
1566+100n 4366+100n
(Note): Set the external command signal [DI] in "
Pr.95
External command signal selection
" at QD77MS16 use.
Refer to Section 5.2 "List of parameters" and Section 5.7 "List of control data" for information on the
setting details.
Summary of Contents for MELSEC-Q QD77MS
Page 1: ......
Page 27: ...A 26 MEMO...
Page 29: ...MEMO...
Page 101: ...3 34 Chapter 3 Specifications and Functions MEMO...
Page 232: ...5 111 Chapter 5 Data Used for Positioning Control MEMO...
Page 315: ...5 194 Chapter 5 Data Used for Positioning Control MEMO...
Page 337: ...6 22 Chapter 6 Sequence Program Used for Positioning Control...
Page 338: ...6 23 Chapter 6 Sequence Program Used for Positioning Control...
Page 339: ...6 24 Chapter 6 Sequence Program Used for Positioning Control...
Page 340: ...6 25 Chapter 6 Sequence Program Used for Positioning Control...
Page 341: ...6 26 Chapter 6 Sequence Program Used for Positioning Control...
Page 342: ...6 27 Chapter 6 Sequence Program Used for Positioning Control...
Page 343: ...6 28 Chapter 6 Sequence Program Used for Positioning Control...
Page 344: ...6 29 Chapter 6 Sequence Program Used for Positioning Control...
Page 345: ...6 30 Chapter 6 Sequence Program Used for Positioning Control...
Page 346: ...6 31 Chapter 6 Sequence Program Used for Positioning Control...
Page 347: ...6 32 Chapter 6 Sequence Program Used for Positioning Control...
Page 348: ...6 33 Chapter 6 Sequence Program Used for Positioning Control...
Page 349: ...6 34 Chapter 6 Sequence Program Used for Positioning Control...
Page 353: ...6 38 Chapter 6 Sequence Program Used for Positioning Control...
Page 354: ...6 39 Chapter 6 Sequence Program Used for Positioning Control...
Page 357: ...6 42 Chapter 6 Sequence Program Used for Positioning Control...
Page 359: ...6 44 Chapter 6 Sequence Program Used for Positioning Control...
Page 360: ...6 45 Chapter 6 Sequence Program Used for Positioning Control...
Page 361: ...6 46 Chapter 6 Sequence Program Used for Positioning Control...
Page 363: ...6 48 Chapter 6 Sequence Program Used for Positioning Control...
Page 364: ...6 49 Chapter 6 Sequence Program Used for Positioning Control...
Page 413: ...MEMO...
Page 433: ...8 20 Chapter 8 OPR Control MEMO...
Page 458: ...9 25 Chapter 9 Major Positioning Control MEMO...
Page 593: ...10 30 Chapter 10 High Level Positioning Control MEMO...
Page 625: ...11 32 Chapter 11 Manual Control MEMO...
Page 659: ...12 34 Chapter 12 Expansion Control MEMO...
Page 767: ...13 108 Chapter 13 Control Sub Functions MEMO...
Page 813: ...14 46 Chapter 14 Common Functions MEMO...
Page 831: ...15 18 Chapter 15 Dedicated Instructions MEMO...
Page 846: ...16 15 Chapter 16 Troubleshooting MEMO...
Page 892: ...16 61 Chapter 16 Troubleshooting MEMO...
Page 971: ...Appendix 62 Appendices MEMO...
Page 974: ......
Page 975: ......