Sub Functions; Outline Of Sub Functions; Speed Limit Function - Mitsubishi Electric MELSECQ Series User Manual

11 SUB FUNCTIONS

CHAPTER 11 SUB FUNCTIONS

11.1 Outline of sub functions

Sub functions

Speed limit function

Speed change function
Software stroke limit function
Acceleration/deceleration
process function
Restart function
11.2 Speed limit function
11
Control type
Machine OPR control
OPR
control
Fast OPR control
Position control
(1-axis linear control)
Positioning Speed-position
control
switching control
Current value
changing
JOG operation
: Always set
– : Setting not required (Setting value is invalid. Use the initial values or setting values within a range where no error
occurs.)
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This chapter details the sub functions of the QD70.
The "sub functions" are used to limit control and add functions, for example, for
execution of OPR control, positioning control and JOG operation. These sub functions
are executed by parameter setting, sequence programs, etc.
There are the following "sub functions".
If the command speed exceeds " Pr. 5 Speed limit value" during control, this function
limits the commanded speed to within the " Pr. 5 Speed limit value" setting range.
This function changes speed at any point during speed control of speed-position
switching control or during JOG operation.
Set the changed speed in the speed change buffer memory ( Cd. 7 New speed value),
and change the speed with the speed change request ( Cd. 6 Speed change request).
If a command outside of the upper/lower limit stroke limit setting range, set in the
parameters, is issued, this function will not execute positioning control for that command.
This function adjusts the acceleration/deceleration processing of control.
This function resumes positioning control from where it had stopped while the axis is at a
stop.
The speed limit function limits the command speed to a value within the "speed limit
value" setting range when the command speed during control exceeds the "speed limit
value".
The details shown below explain about the "speed limit function".
[1] Relation between the speed limit function and various controls
[2] Setting the speed limit function
[1] Relation between the speed limit function and various controls
The following table shows the relation of the "speed limit function" and various
controls.
Speed limit
function
–
search engine
Details
Speed limit value
Does not operate.
"Out of OPR speed setting range (error
Pr. 5 Speed limit value
code: 913)" error or "Out of creep speed
setting range (error code: 914)" error occurs.
"Out of speed range" warning (warning code:
Pr. 5 Speed limit value 20) occurs, and the axis is controlled by the
speed limit value.
Setting value invalid
"Out of speed range" warning (warning code:
Pr. 5 Speed limit value 20) occurs, and the axis is controlled by the
speed limit value.
MELSEC-Q
Operation when speed limit value is
exceeded
–
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