Calibration Of Analog Input Bias And Gain (C16 (Pr.919) To C19 (Pr.920), C38 (Pr.932) To C41 (Pr.933)); Analog Input Display Unit Changing - Pr.241 - Mitsubishi Electric FR-F800 Instruction Manual

(T) Multi-Function Input Terminal 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 VDC, 0 to 10 VDC, or 4 to 2 mADC, 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 stall prevention operation level against the 20 mA for input current (4 to 20 mA) with C40 (Pr.933).
Stall prevention operation level (%)
400
150
(-5V)
Bias
(-10V)
C16(Pr.919)
-100%
∗1
Calibration example of terminal 1

If a negative command is given, the stall prevention operation level is regarded as "0".
• There are three methods to adjust the torque setting voltage (current) bias and gain.
- Method to adjust arbitrary point with application of a voltage (current) between terminals 1 and 5 (4 and 5).
- Method to adjust arbitrary point without application of a voltage (current) between terminals 1 and 5 (4 and 5).
324
- Method to adjust only stall prevention operation level without adjusting voltage (current).
NOTE
• Always calibrate the input after changing the voltage/input signal with Pr.73, Pr.267, and the voltage/current input selection
switch.
Analog input display unit changing (Pr.241)
• The analog input display unit (%/V/mA) for analog input bias and gain calibration can be changed.
• Depending on the terminal input specification set to Pr.73 and Pr.267, the display units of C17 (Pr.919), C19 (Pr.920), C39
(Pr.932), and C41 (Pr.933) will change as shown below.
Analog command
(terminals 1 and 4)
(Depends on Pr.73, Pr.267)
0 to 5 V input
0 to 10 V input
0 to 20 mA input
322
PARAMETERS
C18(Pr.920)
Initial value
0 100%
0 Analog input 5V
0 10V
C17(Pr.919) C19(Pr.920)
-150
Pr.241 = 0 (initial value)
0 to 5 V  0 to 100% (0.1%) display
0 to 10 V  0 to 100% (0.1%) display
0 to 20 mA  0 to 100% (0.1%) display
Stall prevention operation level (%)
400
Gain
150
Bias
C38
(Pr.932)
0
0
C39(Pr.932)
Calibration example of terminal 4
0 to 100%  0 to 5 V (0.01 V) display
0 to 100%  0 to 10 V (0.01 V) display
0 to 100%  0 to 20 mA (0.01 mA)
Initial value
20 100%
4 Analog input 20mA
C41(Pr.933)
page 325
Pr.241 = 1
Gain
C40
(Pr.933)
page 323
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