YASKAWA CIPR-GA50C series Technical Manual page 659

2 : PID Setpoint Value
The drive inputs the PID control target value received from terminal RP.
3 : Speed Feedback (V/F Control)
Select V/f Control method to enable simple encoder feedback.
Use motor speed feedback for better speed control precision. The drive compares the frequency reference to the
motor speed feedback received from the encoder, and uses the ASR function to compensates for motor slip. You
cannot use input terminal RP used for the simple encoder to detect the direction of motor rotation. Use a different
method to detect motor rotation.
Use these methods to detect the direction of motor rotation.
• Use MFDI
Set MFDI H1-xx = 7E [Reverse Rotation Identifier]. When the configured terminal is activated, the motor
operates in Reverse run. When the terminal is deactivated, the motor operates in Forward run.
Use an encoder that outputs 2-tracks (phase A, B) to detect the direction of motor rotation.
• Use the frequency reference
When the you do not use the MFDI, the Forward/Reverse run command is the same as the direction of motor
rotation.
Figure 12.101 shows speed control in Simple Closed Loop V/f Mode.
Enable Simple Closed Loop V/f Mode
1. Connect the encoder output pulse wiring to terminal RP.
2. Set A1-02 = 0 [Control Method Selection = V/f Control].
3. Set H6-01 = 3.
4. Set H6-02 [Terminal RP Frequency Scaling] to the speed feedback (pulse train input signal) frequency at the
time when the frequency reference is 100%.
Make sure that H6-04 [Terminal RP Function Bias] = 0% and H6-03 [Terminal RP Function Gain] = 100%.
5. Select the detection method for the direction of motor rotation.
When you use an MFDI, set H1-xx = 7E.
6. Set C5 parameters related to ASR gain and integral time to adjust responsiveness.
Note:
• Set A1-02 = 0 and H6-01 = 3 to show C5 parameters.
• You cannot use Closed Loop V/f Control mode with the Motor Switch function.
■
H6-02: Terminal RP Frequency Scaling
No.
Name
(Hex.)
H6-02 Terminal RP Frequency
Scaling
(042D)
RUN
YASKAWA SIEPC71061753A GA500 Technical Manual
Figure 12.101 Simple Closed Loop Speed Control Block Diagram
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the frequency of the pulse train input signal used when the item selected with H6-01
[Terminal RP Pulse Train Function] is input at 100%.
12.8 H: Terminal Function Selection
Description
Default
(Range)
1440 Hz
(100 - 32000 Hz)
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