LiteOn EVO 6800 Series - Page 82

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Figure 6.16 PID Operation
■ PID Control Applications
PID control can be used in the following applications.
Application
Description
Sensors Used
Speed
Control
Adjusts the machinery speed to the target speed.
Synchronizes the machinery speed from other
machinery as the target speed.
Tachometer
Pressure
Control
Feeds back pressure date to maintain constant pressure.
Pressure sensor
Fluid Control
Feeds back flow data to keep a constant flow level
Flow rate sensor
Temperature
Control
Feeds back temperature data to maintain a constant
temperature by control the fan speed.
Thermistor, thermocoupler
■ PID Target Input Methods
The PID target can be input according to the methods showed in Table 6.6. If more than one
PID targets are input, it will be selected as per the priority.
Ex. When E3-01=9 (PID Target) and E5-00=2 (PID Target), the signal from terminal A1 will be
selected as the PID target.
Table 6.6 PID Target Input Sources
Priority
PID Target Input
Sources
Settings
Highest *
Terminal A1
Terminal A2
Set E3-01 to 9 (PID target)
Set E3-07 to 9 (PID target)
PID input
PID output
PID output
time
I control
P control
time