YASKAWA GA700 Series Technical Manual page 670

12.3 b: Application
PID Feedback Input Method
MFAI terminal A1
MFAI terminal A2
MFAI terminal A3
Pulse train input terminal RP
• Use Two Feedback Signals and Calculate the Deviation from the Difference between Those Signals
Use Table 12.31 to select how the second feedback value is input to the drive. The drive calculates the deviation
of the second feedback value. Set H3-02, H3-06, or H3-10 = 16 [Terminal A1/A3/A2 Function Selection =
Differential PID Feedback] to enable the second feedback signal used to calculated the deviation.
PID Differential Feedback Input Method
MFAI terminal A1
MFAI terminal A2
MFAI terminal A3
Note:
If you set two or more of H3-02, H3-06, and H3-10 to 16, it will trigger oPE07 [Analog Input Selection Error].
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PID Control Block Diagram
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PID Feedback Loss Detection
The PID feedback loss detection function detects broken sensors and defective wiring between the drive and
sensors.
Use the PID feedback loss detection function when you use PID control. If the feedback signal is too low, the
motor can suddenly accelerate to the maximum output frequency. This function prevents such risks to the load.
The drive uses two methods to detect feedback loss:
670
Table 12.30 PID Feedback Input Method
Table 12.31 PID Differential Feedback Input Method
Figure 12.36 PID Control Block Diagram
Setting Value
Set H3-02 = B [PID Feedback].
Set H3-10 = B.
Set H3-06 = B.
Set H6-01 = 1 [PID Feedback Value].
Setting Value
Set H3-02 = 16 [Differential PID Feedback].
Set H3-10 = 16.
Set H3-06 = 16.
YASKAWA SIEPC71061705H GA700 Series Technical Manual