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8.5 Solutions to Common EMC Interference Problems
The servo drive generates very strong interference. Although EMC measures are taken, the interference may still
exist due to improper cabling or grounding during use. When the servo drive interferes with other devices, adopt
the following solutions.
Interference Type Solution
Leakage protection switch tripping
•
Connect the motor housing to the PE of the servo drive.
•
Connect the PE of the Servo drive to the PE of the line voltage.
•
Add a safety capacitor to the power input cable.
•
Add magnetic rings to the input drive cable.
Servo drive interference during running
•
Connect the motor housing to the PE of the servo drive.
•
Connect the PE of the Servo drive to the PE of the line voltage.
•
Add a safety capacitor to the power input cable and wind the cable with
magnetic rings.
•
Add a safety capacitor to the interfered signal port or wind the signal cable
with magnetic rings.
•
Connect the equipment to the common ground.
Communication interference
•
Connect the motor housing to the PE of the servo drive.
•
Connect the PE of the servo drive to the PE of the line voltage.
•
Add a safety capacitor to the power input cable and wind the cable with
magnetic rings.
•
Add a matching resistor between the communication cable source and the
load side.
•
Add a common grounding cable besides the communication cable.
•
Use a shielded cable as the communication cable and connect the cable
shield to the common grounding point.
I/O interference
•
Enlarge the capacitance at the low-speed DI. A maximum of 0.1 uF
capacitance is suggested.
•
Enlarge the capacitance at the AI. A maximum of 0.22 uF is suggested.
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