Mitsubishi Electric MELSEC-L LD75D, User Manual

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12.5.2
Override function
The "override function" changes the command speed by a designated percentage (1 to 300%) for all control to be
executed.
The speed can be changed by setting the percentage (%) by which the speed is changed in "[Cd.13] Positioning
operation speed override".
• Control details
• Control precautions
• Setting method
(1) Control details
The following shows that operation of the override function.
• A value changed by the override function is monitored by "[Md.22] Feedrate".
• If "[Cd.13] Positioning operation speed override" is set to 100%, the speed will not change.
• If "[Cd.13] Positioning operation speed override" is set a value 100% or less, the warning "Less than
minimum speed (warning code: 110)" is generated, and control will be carried out at speed unit "1" at the
time " Feedrate" becomes a value of "1" or less.
• If there is not enough remaining distance to change the speed by the "override function" during the "position
control" or position control by the "speed-position switching control" or "position-speed switching control", the
operation will be carried out at the possible speed for the distance.
• If the speed changed by the "override function" is greater than the "[Pr.8] Speed limit value", a warning
"Speed limit value over (warning code: 501)" will occur and the speed will be controlled at the "[Pr.8] Speed
limit value". The "[Md.39] In speed limit flag" will turn ON.
Command speed
100 1 50 150 100 200
50
Feedrate
50 1 25 75
50
75
t
V
Da.8
Cd.13
Md.22
Positioning operation
speed override
Not affected by the override
value during deceleration
Not enough remaining
distance could be secured,
so operation is carried out
at an increased speed.