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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.
Setting item
Setting
value
Setting details
Buffer memory address
LD77MS2
LD77MS4
LD77MS16
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 LD77MS16 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-L Series
Page 2: ......
Page 30: ...MEMO ...
Page 70: ...2 10 Chapter 2 System Configuration MEMO ...
Page 83: ...3 13 Chapter 3 Specifications and Functions MEMO ...
Page 103: ...3 33 Chapter 3 Specifications and Functions MEMO ...
Page 107: ...3 37 Chapter 3 Specifications and Functions MEMO ...
Page 111: ...3 41 Chapter 3 Specifications and Functions MEMO ...
Page 115: ...3 45 Chapter 3 Specifications and Functions MEMO ...
Page 140: ...4 22 Chapter 4 Installation Wiring and Maintenance of the Product MEMO ...
Page 253: ...5 113 Chapter 5 Data Used for Positioning Control MEMO ...
Page 342: ...5 202 Chapter 5 Data Used for Positioning Control MEMO ...
Page 438: ...7 20 Chapter 7 Memory Configuration and Data Process MEMO ...
Page 440: ...MEMO ...
Page 485: ...9 25 Chapter 9 Major Positioning Control MEMO ...
Page 594: ...9 134 Chapter 9 Major Positioning Control MEMO ...
Page 624: ...10 30 Chapter 10 High Level Positioning Control MEMO ...
Page 656: ...11 32 Chapter 11 Manual Control MEMO ...
Page 690: ...12 34 Chapter 12 Expansion Control MEMO ...
Page 798: ...13 108 Chapter 13 Control Sub Functions MEMO ...
Page 866: ...14 68 Chapter 14 Common Functions MEMO ...
Page 884: ...15 18 Chapter 15 Dedicated Instructions MEMO ...
Page 899: ...16 15 Chapter 16 Troubleshooting MEMO ...
Page 1036: ...Appendix 88 Appendices MEMO ...
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