28
HIGH RESOLUTION ANALOG INPUT
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)
Torque bias
Bias
C34 (Pr. 928)
Pr. 840
= "2" (at regeneration when the motor is in forward rotation)
Fall-time
torque bias
Gain
Pr. 848
Fall-time
torque bias
Bias
Pr. 847
Bias amount
Torque bias
Gain
C36 (Pr. 929)
Input voltage
150%
0
Voltage for max. load
Voltage for balanced load
Pr. 846
Initial value
<When the motor runs in forward rotation direction>
Bias amount
Input voltage
150%
0
Voltage for max. load
Voltage for balanced load
Pr. 846
Initial value
<When the motor runs in reverse rotation direction>
C35 (Pr. 928)
C37 (Pr. 929)
