3 MAJOR POSITIONING CONTROL
3.1 Overview of the Major Positioning Controls
69
3
■
Switching speed (Refer to [Pr.19] Speed switching mode.)
The following two modes are provided to change the speed.
• Standard speed switching mode
Speed switching mode
Description
Standard switching
Switches the speed when executing the next positioning data.
Front-loading switching
Switches the speed at the end of the positioning data currently being
executed.
1) If the command speed of the positioning data currently being executed and that of the next positioning data differ, the machine will accelerate or decelerate
after reaching the positioning point set in the positioning data currently being executed, and the speed will change over to the speed set in the next
positioning data.
2) The parameters used in the acceleration/deceleration processing to the command speed set in the next positioning data to be executed are those of the
next positioning data to be executed.
If the command speeds are the same, the speed changed will not be performed.
3) Speed switching condition
If the movement amount is small to the target speed and may not reach the target speed even if the acceleration/deceleration is performed, the machine is
accelerated or decelerated to get close to the target speed.
If the movement amount will be exceeded when the automatic deceleration needs to be performed (such as when the operation pattern is 00 or 01), the
machine will immediately stop at the specified positioning address, and Insufficient movement amount (Warning code: 0998H) occurs.
t
n
n + 1
t
n
n + 1
Speed
Speed
Switch the speed when executing
the next positioning data.
Positioning is started at the specified speed
for the next positioning data execution.
n: Positioning
data No.
For standard switching
For front-loading switching
OFF
ON
OFF
ON
OFF
ON
OFF
ON
11
11
11
01
00
V
t
Da. 1
[XC, XD, XE, XF]
[X10, X11, X12, X13]
[Y10, Y11, Y12, Y13]
[X14, X15, X16, X17]
Positioning
Operation pattern
Dwell time
Speed
switching
Dwell time
Positioning start signal
Start complete signal
BUSY signal
Positioning complete signal
Summary of Contents for MELSEC iQ-R RD75P4
Page 1: ...MELSEC iQ R Positioning Module User s Manual Application RD75P2 RD75P4 RD75D2 RD75D4 ...
Page 2: ......
Page 13: ...11 MEMO ...
Page 19: ...17 CONTENTS INDEX 588 REVISIONS 592 WARRANTY 593 TRADEMARKS 594 ...
Page 498: ...496 13 PROGRAMMING 13 2 List of Labels Used ...
Page 503: ...13 PROGRAMMING 13 4 Program Example 501 13 ...
Page 514: ...512 13 PROGRAMMING 13 4 Program Example Restart program Parameter data initialization program ...
Page 515: ...13 PROGRAMMING 13 4 Program Example 513 13 Flash ROM write program Error reset program ...
Page 516: ...514 13 PROGRAMMING 13 4 Program Example Stop program ...
Page 565: ...APPENDICES Appendix 4 Operation Examples of When the Remote Head Module Is Mounted 563 A ...
Page 597: ......