Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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7 CONTROL SUB FUNCTIONS
7.5 Functions that Change Control Details
Override function
Override function changes the command speed by a specified percentage (0 to 300%) for all controls 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
The following shows the operation of the override function.
• This function is valid from the moment when the positioning control is started.
• A value changed using the override function is monitored by [Md.22] Feedrate.
• If [Cd.13] Positioning operation speed override is set to 100%, the speed does not change.
• If [Cd.13] Positioning operation speed override is set to 1 to 100% and the value in [Md.22] Feedrate is less than 1, Less
than speed 1 (Warning code: 0904H) occurs and the control is performed at the speed unit 1 at that time.
• When [Cd.13] Positioning operation speed override is set to 0%, the speed becomes 0 and Speed change 0 flag ([Md.31]
Status: b10) is turned on.
• When the speed is changed using the override function during the position control or during the position control of the
speed-position switching control and position-speed switching control, the operation is performed at a speed for the
distance if a distance enough to perform the speed change cannot be ensured.
• If the speed changed using the override function is equal to or greater than the value set in [Pr.8] Speed limit value, Speed
limit value over (Warning code: 0991H) occurs and the speed is controlled at the speed set in [Pr.8] Speed limit value.
[Md.39] In speed limit flag is turned on.
Da.8
Cd.13
Md.22
50
100
50 1 25 75 50 75
1 50 150 100 200
V
t
Command speed
The speed is not affected by
the override value during
deceleration. Because the remaining
distance is not enough, the
operation is carried out at a
possible increased speed.
Positioning operation
speed override
Feedrate