Code 4: How To Adjust Alpha (PID Control)
Chapter Seven: Operation in Setup Mode
218
Code 4: How To Adjust Alpha (PID Control)
LEFT DISPLAY
CLOSE
SETUP
CODE
The code number is
displayed and edited here.
In this example, the
code number is 4.
MAIN DISPLAY
This display is used to edit the
alpha value (for PID control).
Figure 69: Code 4 Display
This function requires the Control board.
Alpha is a control parameter that helps reduce the amplification of noise, which is an inherent
problem in PID control algorithm calculations. The noise itself is inherent in control systems.
With a low Alpha value, the lead’s response time is slower. With a higher Alpha value, the lead
may be overly sensitive to noise. Unless there is a well understood reason for changing the
Alpha value, it should remain at its default value of 20.
1. Repeatedly press the [
DISPLAY MODE
] key until the 146 unit is in Setup Mode.
The system responds by scrolling through modes.
2. Use the arrow keys to scroll to the
CODE
legend.
The system responds by causing the left display to blink.
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