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Noise Reduction Techniques - Mitsubishi Electric FR-A7AZ Instruction Manual

700 series bipolar analog output function high resolution analog input function motor thermistor interface.
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HIGH RESOLUTION ANALOG INPUT
Pr. 840 = "2" (at regeneration when the motor is in forward rotation)
<When the motor runs in forward rotation direction>
Bias amount
Torque bias
Bias
C34 (Pr. 928)
0
C35 (Pr. 928)
150%
5.4

Noise reduction techniques

When operation is unstable due to Electro-Magnetic Interference (EMI), take measures referring to below.
(1) Measures at wiring
⋅ Separate the power cable as far away as possible from the signal cable.
⋅ Use a shielded twisted pair cable for a signal cable.
Take one of appropriate measures below for the shielded cable.
⋅ Connect to terminal 5 of the FR-A7AZ.
⋅ Connect to the common terminal of an analog command device.
⋅ Connect to both terminal 5 of the FR-A7AZ and common terminal of the analog command device.
⋅ Leave both terminal 5 of the FR-A7AZ and common terminal of the analog command device open. (leave the
shielded cable suspended)
28
Voltage for balanced load
Pr. 846
Voltage for max. load
C37 (Pr. 929)
Input voltage
Torque bias
Gain
C36 (Pr. 929)
Initial value
<When the motor runs in reverse rotation direction>
Bias amount
Fall-time
torque bias
Bias
Pr. 847
0
150%
Voltage for balanced load
Pr. 846
Voltage for max. load
Input voltage
Fall-time
torque bias
Gain
Initial value
Pr. 848

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