2.8 H: Terminal Function Selection
350 YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
0 : Frequency Reference
When b1-01 = 4 [Frequency Reference Selection 1 = Pulse Train Input] or b1-15 = 4 [Frequency Reference Selection
2 = Pulse Train Input], the drive inputs the frequency reference received from terminal RP.
1 : PID Feedback Value
The drive inputs the PID control feedback value received from terminal RP.
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 you do not use the MFDI, the Forward/Reverse run command is the same as the direction of motor rotation.
Figure 2.93 shows speed control in Simple Closed Loop V/f Mode.
Figure 2.93 Simple Closed Loop Speed Control Block Diagram
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 Simple Closed Loop V/f Mode with the Motor Switch function.
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