Mitsubishi Electric MELSEC-L LD75P User Manual page 533

(2) Control precautions
• 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. For the other axes which perform interpolation, the
speed can be suppressed by the ratio of a command speed.
• If any axis exceeds "[Pr.8] Speed limit value" during 2- to 4-axis linear interpolation control, 2- to 4-axis fixed-
feed control, 2-axis circular interpolation control, or 3-axis helical interpolation control, the axis exceeding the
speed limit value is controlled at the speed limit value. For the other axes performing interpolation, the speed
can be suppressed by the ratio of a movement distance.
• In 2- to 4-axis linear interpolation control or 2- to 4-axis fixed-feed control, the speed limit value for the
interpolation axis may not function under the following condition: "1: Reference axis speed" is set in "[Pr.20]
Interpolation speed designation method" or "[Da.29] Interpolation speed designation method", and the
reference axis is the minor axis and the interpolation axis is the major axis.
• In 3-axis helical interpolation control, control the composite speed of the circular interpolation axis or the
speed of the linear interpolation axis so that the speeds do not exceed "[Pr.8] Speed limit value".
(3) Setting method
To use the "speed limit function", set the "speed limit value" in the parameters shown in the following table, and
write them to the LD75.
The set details are validated when written to the LD75.
Setting item
[Pr.8] Speed limit value
JOG speed limit
[Pr.31]
value
Refer to  Page 118, Section 5.2 for the information on detail settings.
Remark
● Parameters are set for each axis.
● It is recommended that the parameters be set whenever possible with GX Works2. Execution by program uses many
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".)
CHAPTER 12 CONTROL SUB FUNCTIONS
Setting details
12
Factory-set initial
value
200000
20000
531