YASKAWA A1000 Series Technical Manual page 242

5.7 H: Terminal Functions
Setting 1: PID feedback value
Using this setting, the feedback value for PID control can be supplied as a pulse signal at terminal RP.
Control on page 152 for details on PID control.
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 152 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-
RP is incapable 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-
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-
frequency reference as the direction for the speed feedback detected at the pulse input.
Figure 5.85
common_TMonly
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 the signal used for detecting the direction. If a digital input is used, set H1-
4.
Use the ASR gain and integral time parameters described in
page 171 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, note that the V/f Control with simple PG feedback can be used for motor 1 only.
H6-02: Pulse Train Input Scaling
■
This parameter sets the pulse signal frequency that is equal to 100% of the input value selected in parameter H6-01.
No.
H6-02
242
Figure 5.85 Speed Control with ASR in V/f with Simple Speed Feedback
Name
Pulse Train Input Scaling
parameters) like shown in
= 7E), the drive uses the direction of the
Motor speed
C5: Automatic Speed Regulator (ASR) on
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Refer to b5: PID
Refer to b5: PID
Figure 5.82. Because input terminal
= 7E) is closed, the drive assumes
= 7F.
Setting Range
100 to 32000 Hz
Default
1440 Hz