Speed Control; Overview; Starting Speed Control - Omron CJ1W-NC271 - 12-2009 Operation Manual

Speed Control

Position
Pushing direction target
position (position
command value)
Pushing stop position
Speed
Pushing direction
target speed (speed
command value)
Position deviation
Start
Note
10-5 Speed Control

10-5-1 Overview

10-5-2 Starting Speed Control

Solid line: Command speed
Pushing Start in opposite
direction
(deviation
consumption)
The DEVIATION COUNTER RESET can be used to reset the remaining posi-
tion deviation to 0 for PCUs with unit version 1.3 or later. Refer to 10-10 DEVI-
ATION COUNTER RESET for details on DEVIATION COUNTER RESET.
In Speed control, the PCU controls the rotation speed of the Servomotor by
directly executing speed commands in a speed loop without using the Servo
Drive's position loop.
Speed control can be used when a G5-series Servo Drive, a G-series Servo
Drive, or a W-series Servo Drive is connected.
With the SMARTSTEP Junior Servo Drives, speed commands cannot be
given directly for a speed loop. When using a SMARTSTEP Junior Servo
Drive, position control can be performed while changing the speed using jog-
ging or direct operation to achieve feeding at desired speeds.
Speed control is performed by setting the target speed in the speed command
value for speed control in the Axis Operating Output Memory Areas and
started when the SPEED CONTROL Bit turns ON. When starting speed con-
trol, make sure that the SPEED CONTROL Bit remains ON until the Receiving
Command Flag or Busy Flag in the Axis Operating Input Memory Area turns
ON.
Solid line: Command present position
Broken line: Feedback present position
(Servomotor's actual position)
Broken line: Servomotor's actual speed
Start in
opposite
direction
Section 10-5
Time
Time
Time
385