Mitsubishi Electric MELSEC-Q Series User Manual page 628

[2] Precautions during control
(1) If any axis exceeds "[Pr.8] Speed limit value" during 2- to 4-axis speed control,
the axis in excess of the speed limit value is controlled at the speed limit value.
The speeds of the other axes interpolated are suppressed depending on their
command speed ratios.
(2) If the reference axis exceeds "[Pr.8] Speed limit value" during 2-axis circular
interpolation control, the reference axis is controlled at the speed limit value (The
speed limit does not function on the interpolation axis side.)
(3) If any axis exceeds "[Pr.8] Speed limit value" during 2- to 4-axis linear
interpolation control or 2- to 4-axis fixed-feed control, the axis exceeding the
speed limit value is controlled with the speed limit value. The speeds of the other
axes being interpolated are suppressed by the movement amount ratio.
POINT
When the "reference axis speed" is set during interpolation control, set so the major
axis side becomes the reference axis. If the minor axis side is set as the reference
axis, the major axis side speed may exceed the "[Pr.8] Speed limit value".
[3] Setting the speed limit function
To use the "speed limit function", set the "speed limit value" in the parameters
shown in the following table, and write them to the Simple Motion module.
The set details are validated at the next start after they are written to the Simple
Motion module.
Setting item
[Pr.8] Speed limit value
JOG speed limit
[Pr.31]
value
: Refer to Section 5.2 "List of parameters" for setting details.
REMARK
 Parameters are set for each axis.
 It is recommended that the parameters be set whenever possible with GX Works2.
Execution by sequence program uses many sequence programs and devices. The
execution becomes complicated, and the scan times will increase.
Setting
value
Set the speed limit value (max. speed during control).
Set the speed limit value during JOG operation (max.
speed during control). (Note that "[Pr.31] JOG speed
limit value" shall be less than or equal to "[Pr.8] Speed
limit value".)
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Chapter 13 Control Sub Functions
Setting details
Factory-set
initial value
200000
20000