3-5
3.3.2 Setting up reference frequency and PID process command
You can set up the desired frequency command and PID process command by using the potenti-
ometer and
and
keys on the keypad. You can also set up the reference frequency as fre-
quency, load shaft speed, line speed, and constant rate of feeding time by setting function code E48.
Setting up the reference frequency
Using the built-in potentiometer (factory default)
Setting function code F01 to "4: Built-in potentiometer (POT)" (factory default) allows you to specify
the reference frequency using the potentiometer.
Using the
and
keys
(1) Set function code F01 to "0:
/
keys on the built-in keypad." In Programming mode or
Alarm mode, the
/
keys cannot be used for setting the reference frequency, so switch to
Running mode.
(2) Press
the or
key to display the reference frequency with the lowest digit blinking.
(3) To change the reference frequency, press the
or
key again. The new setting will be
automatically saved into the inverter’s memory. It is kept there even if the inverter is powered off,
and it will be used as the initial frequency next time the inverter is powered on.
• If you have set the function code F01 to "0:
/
keys on the built-in keypad" but have
selected a frequency setting other than frequency 1 (i.e., frequency 2, Via communica-
tions, or Multistep frequency), then the
or
key cannot be used for setting up the
reference frequency even if the keypad is in Running mode. Pressing either of these keys
will just display the currently selected reference frequency.
• When you start changing the reference frequency or any other parameter with the
or
key, the lowest digit on the display will blink and start changing. As you are holding the
key down, blinking will gradually move to the upper digit places and the upper digits will
be changeable.
• If you press the
or
key once and then hold down the
key for more than 1
second after the lowest digit starts blinking, blinking will move to the next upper digit place
to allow you to change the value of that digit (cursor movement). This way you can easily
change the values of the higher digits.
• By setting function code C30 to "0:
/
keys on the built-in keypad" and selecting
frequency set 2 as the frequency setting method, you can also specify or change the
reference frequency in the same manner using the
and
keys.
Setting up the PID process command
To enable PID control, you need to set function code J01 to "1" or "2."
Refer to the FRENIC-Mini User's Manual for details on the PID control.
