Mitsubishi Electric FR-F820-04750 Instruction Manual page 431

Parameters
Calibration of analog input bias and gain
(C16 (Pr. 919) to C19 (Pr. 920), C38 (Pr. 932) to C41 (Pr. 933))
● "Bias"/"gain" function can adjust the relation between the stall prevention operation level and the
setting input signal.
Examples of setting input signals are 0 to 5 V DC, 0 to 10 V DC, or 4 to 2 mA DC, and they are
externally input.
● Set the bias value of the terminal 1 input using C16 (Pr. 919).
(Shipped from factory with the stall prevention operation level for 0 V)
● Set the stall prevention operation level against the input voltage set by Pr. 73 "Analog input
selection" with C18 (Pr. 920). (Initial value is 10 V.)
● Set the bias value of the terminal 4 input using C38 (Pr. 932).
(The initial value is the stall prevention operation level for 4 mA.)
● Set the the stall prevention operation level against the 20 mA for input current (4 to 20 mA) with
C40 (Pr. 933).
* If a negative command is given, the stall prevention operation level is regarded as "0".
Fig. 5-125:
Fig. 5-126:
FR-F800
Stall prevention operation level (%)
(-5 V)
Bias
(-10 V)
C16 (Pr. 919)
-100 %
*
Calibration example of terminal 1
Signal adjustment of terminal 1
Stall prevention operation level (%)
400
150
Bias
C38
(Pr. 932)
0
0
C39 (Pr. 932)
Signal adjustment of terminal 4
(T) Multi-Function Input Terminal Parameters
400
150
Initial value
0
Analog input
0
0
C17 (Pr. 919)
–150
Initial value
20 Analog input
4
Calibration example of terminal 4
Gain
C18 (Pr. 920)
100%
5 V
10 V
C19 (Pr. 920)
Gain
C40
(Pr. 933)
100 %
20 mA
C41 (Pr. 933)
I002648E
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