YASKAWA AC Drive-A1000 Technical Manual page 236

5.7 H: Terminal Functions
Setting 2: PID setpoint value
Using this setting, the setpoint value for PID control can be supplied as a pulse signal at terminal RP.
Control on page 141 for details on PID control.
Setting 3: Speed feedback (V/f Control with Simple Speed Feedback)
This setting can be used in V/f control to increase the speed control precision by using a motor speed feedback signal. The
drive reads the speed feedback from terminal RP, compares it to the frequency reference and compensates the motor slip using
a speed regulator (ASR, setup in the C5-oo parameters) like shown in
of detecting motor direction, a separate way of determining motor direction still needs to be set up:
1.
Using a Digital Input
If a digital input programmed for "Forward/reverse detection" (H1-oo = 7E) is closed, the drive assumes reverse
rotation. If open, then the drive assumes that the motor is rotating forwards.
2.
Using the Frequency Reference Direction
If no digital input is set to "Forward/reverse detection" (H1-oo = 7E), the drive uses the direction of the frequency
reference as the direction for the speed feedback detected at the pulse input.
Enabling V/f Control with Simple Speed Feedback:
1.
Set the drive to V/f Control (A1-02 = 0).
2.
Connect the motor speed pulse signal to the pulse input RP, set H6-01 = 3, and set the pulse signal frequency that
is equal to the maximum speed to H6-02 (pulse input scaling). Make sure the pulse input bias (H6-04) is 0% and the
gain (H6-03) is 100%.
3.
Decide on the signal used for detecting the direction. Set H1-oo = 7F if using a digital input.
4.
Use the ASR gain and integral time parameters described in
for adjusting the responsiveness.
Note: 1. C5 parameters will appear when using V/f Control (A1-02 = 0) and when the pulse input RP function is set for simple PG feedback in V/
f Control (H6-01 = 3).
2. If running two motors from the same drive, V/f Control with simple PG feedback can be used for motor 1 only.
n H6-02: Pulse Train Input Scaling
Sets the pulse signal frequency that is equal to 100% of the input value selected in parameter H6-01.
No.
H6-02
236
Figure 5.85 Speed Control with ASR in V/f with Simple Speed Feedback
Name
Pulse Train Input Scaling
Figure 5.82. Because input terminal RP is incapable
Motor speed
C5: Automatic Speed Regulator (ASR)
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Refer to b5: PID
Setting Range
100 to 32000 Hz
on page 161
Default
1440 Hz