Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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7 CONTROL SUB FUNCTIONS
7.5 Functions that Change Control Details
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7.5
Functions that Change Control Details
Functions that change the control details include Speed change function, Override function, Acceleration/deceleration time
change function, and Torque change function. Each function is executed by setting parameters or creating and writing a
program.
Both Speed change function and Override function change the speed. The following shows the differences between these
functions. Select one function corresponding to the application.
Speed change function
• The speed is changed at any timing, only in the control being executed.
• The new speed is directly set.
Override function
• The speed is changed for all controls to be executed. (Note that the manual pulse generator operation is excluded.)
• The new speed is set in percentage (%) of the command speed.
Speed change function
Speed change function changes the speed of the operation being controlled to a newly specified speed at a specified timing.
The new speed is directly set in the buffer memory, and the speed is changed using a speed change command ([Cd.15]
Speed change request) or an external command signal.
During the machine OPR, the speed change to the creep speed cannot be performed after the deceleration (or acceleration)
start due to the detection of the near-point dog ON.
Control details
The following figure shows the operation during the speed change.
V
V1
V2
V3
t
Md. 40
Speed change to V2
Operation during
positioning with V1
Speed change to V3
In speed change
processing flag