Inovance MD290T45G/55P - Page 125

6. Description of Parameters
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6
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PID Reference
The PID (Proportional + Integral + Derivative) function uses system feedback for closed-
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The purpose of PID control is to keep the drive output as close as possible to a desired
reference via PID adjustment.
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Proportional gain (Kp1)
A large value tends to reduce present error, but too large setting will cause system
oscillation.
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Integral time (Ti1)
The shorter the integral time is, the faster the error will be predicted. But too short
setting will cause overshoot or system oscillation.
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Derivative time (Td1)
The longer the derivative time is, the faster the system will respond to the error. But
too longer setting will cause vibration.
Figure 6-22 Function block diagram of the PID control
)*
*
1
1(Kp STd
STi

Motor Machine
Sensor
PID
function
+
-
Target
FA-00 = 0
)*
*
1
1(Kp STd
STi

Motor
Machine
Sensor
PID
function
+
-
Target
FA-00 = 1/2/3/4/5/6
Feedback
Feedback
FA-01
When
When
AI1
AI2
AI3
Pulse
reference (DI5)
Communication
setting