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Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual Page 185

Transistorized inverter, high function & low acoustic noise.
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<Adjustment procedure> Pr. 902 (Pr. 904) "frequency setting voltage (current) bias"
• When operation panel (FR-DU04) is used
(1) Any point is adjusted with
a voltage (current) applied
Apply the bias voltage (current).
*Pr. 903 to Pr. 905 can also be adjusted similarly using the above procedure.
Note: 1. If the Pr. 903 or Pr. 905 (gain adjustment) value is changed, the Pr. 20 value does not change.
The input signal to terminal 1 (frequency setting auxiliary input) is added to the frequency setting
2. For the operation procedure using the parameter unit (FR-PU04), refer to the FR-PU04 instruction
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Select the PU operation mode.
Read Pr. 902 (Pr. 904) value.
Press the [SET] key.
Using the [UP/DOWN] key, set the bias
Press the [SET] key for about 1.5 seconds
The analog voltage (current) monitor value
across terminals 2(4)-5 is displayed.
(2) Any point is adjusted with
no voltage (current) applied
Using the [UP/DOWN] key, set
the bias voltage (current) in %.
[0% for 0V (0mA), 100% for 5V
(10V, 20mA)]
Press the [SET] key for about 1.5 seconds.
The bias voltage (current) setting flickers.
Bias setting complete.
Press the [SET] key.
The cursor moves to the next parameter.
(3) Bias voltage (current)
is not adjusted.
When the [UP] or [DOWN] key
is pressed, the present setting is


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