5-12
5-4 Full Closing Control
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
5
BASIC CONTROL Mode
Supportive Scales
The corresponding scale for each output type is as follows.
*1. These are the feedback speeds from the external encoder at which Servo Drive can respond.
Check the external encoder operation manual for its maximum output frequency.
*2. These are the directions that the Drive counts the pulse of external encoder of 90
phase difference
output type.
*3. For the external encoder connection direction, set the rotation direction so that count-up occurs when
the motor shaft is rotating in the CCW direction, and count-down occurs when the motor shaft is
rotating in the CW direction. If the connection direction cannot be selected due to installation
conditions, etc., the count direction can be reversed using External Feedback Pulse Direction
Switching (Pn326).
Precautions for Correct Use
Take note that if Pn000 = 1, the encoder count direction becomes opposite to the count direction
used for monitoring the total external encoder feedback pulses, etc.
If Pn000 = 0, the count direction matches the count direction for monitoring.
Even when the drive speed is within the specified range, an acceleration error occurs if the motor
shaft rotation speed exceeds the maximum speed.
To check the installation direction, use the front panel monitor or the monitoring function of CX-
Drive and check the count directions of the external encoder total feedback pulses and the
encoder total feedback pulses. If they match, the connection is set up correctly.
Pn323
set
value
External encoder type
Corresponding scale examples
Maximum input
frequency *
1
0
90
phase difference
output type
*2*3
External encoder of phase-AB output type
0 to 4 Mpps
(After quadruple
multiplier)
1
Serial communication type
(Incremental encoder
specifications)
*3
Sony Manufacturing Systems Corporation
SR75, SR85
0 to 400 Mpps
2
Serial communication type
(Absolute encoder
specifications)
*3
Mitutoyo Corporation
AT573, ST771A, ST773A
Sony Manufacturing Systems Corporation
SR77, SR87
0 to 400 Mpps
Count-down direction
Count-up direction
EXB is 90
°
ahead of EXA.
t1
>
0.25
μ
s
t2
>
1.0
μ
s
t1
t2
EXA
EXB
EXB is 90
°
behind EXA.
t1
>
0.25
μ
s
t2
>
1.0
μ
s
t1
t2
EXA
EXB
