Speed Control (Ii) - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

5.14

Speed Control (II)

• Speed control for the specified axis is executed.
• Speed control not includes positioning loops for control of servo amplifiers. It can be used for control, etc. so that it may not
become error excessive.
Refer to the speed-torque control for executing speed control that does not include positioning loops without
using the servo program. (Page 431 Speed-Torque Control)
• Speed control () uses the VVF (Forward) and VVR (Reverse) servo instructions.
: Must be set, : Set if required
Servo Positioning Number
instruction method of
control
axes
VVF
«
1
VVR
*1 Only when the reference axis speed is specified
Processing details
• Controls the axis at the specified speed until the input of the stop command after starting of the servomotors.
Servo instruction
VVF
VVR
• Current value or deviation counter do not change at "0".
• When the setting for "torque" is set in the servo program and an indirect setting made, the torque limit value can be
changed during operation by changing the value of the indirect device.
• The stop command and stop processing are the same as for speed control (). (Page 259 Stop processing and
restarting after stop)
Precautions
• The feed current value is changed to "0" at the start. When speed control () is executed in the absolute position system,
the feed current value that is restored when the control circuit power supply of the servo amplifier or the Multiple CPU
system power supply is turned ON again, may be different from the feed current value before the power supply was turned
ON again.
• The dwell time cannot be set.
Positioning data set in servo instructions
Common Arc
© ¨ ¨ © ©
Description
Forward direction start
Reverse direction start
OSC Parameter block
© © © © © ©
Others
© © ©
5 POSITIONING CONTROL
5.14 Speed Control (II)
5
321