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Chapter 13 Control Sub Functions
13.5 Functions to change the control details
Functions to change the control details include the "speed change function", "override
function", "acceleration/deceleration time change function", "torque change function"
and "target position change function". Each function is executed by parameter setting
or sequence program creation and writing.
Refer to Section 3.2.5 "Combination of LD77MS main functions and sub functions" for
combination with main function.
Both the "speed change function" or "override function" change the speed, but the
differences between the functions are shown below. Use the function that corresponds
to the application.
"Speed change function"
The speed is changed at any time, only in the control being executed.
The new speed is directly set.
"Override function"
The speed is changed for all control to be executed.
The new speed is set as a percent (%) of the command speed.
POINT
"Speed change function" and "Override function" cannot be used in the manual
pulse generator operation and speed-torque control.
13.5.1 Speed change function
The speed control function is used to change the speed during control to a newly
designated speed at any time.
The new speed is directly set in the buffer memory, and the speed is changed by a
speed change command (
Cd.15
Speed change request
) or external command signal.
During the machine OPR, a speed change to the creep speed cannot be carried out
after deceleration start because the near point dog ON is detected. When the speed
change function is enabled and the speed is slower than the creep speed, the speed
change is disabled and the speed accelerates to the creep speed after the near point
dog ON is detected.
The details shown below explain about the "speed change function".
[1] Control details
[2] Precautions during control
[3] Setting the speed change function from the PLC CPU
[4] Setting the speed change function using an external command signal
Summary of Contents for MELSEC-L Series
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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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