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5.1 Standard RS-485 Communications Ports
5-17
Chap. 5
USING ST
ANDARD RS-
485
(2) Measures on side generating noise
Carrier frequency:
It is possible to lower the noise level by lowering the setting of function code
F26 [Motor operation noise (carrier frequency)]. However, be aware that
lowering the carrier frequency can result in higher levels of noise from other
sources.
Equipment:
It is possible to contain noise (radiation/inductance) by passing the power wires
through a metal duct or using a metal control panel.
Isolated power
supply:
It is possible to curb the propagation of noise (conductance) by using an
isolated transformer for the inverter power supply.
(3) Measures to lower noise level
Consider using a zero-phase reactor (9.6.5) and an EMC filter (9.6.2). Normally, you should
consider measure (3) if measures (1) and (2) do not lower the noise to the allowable level for the
equipment.
Summary of Contents for FRENIC-VG Series
Page 1: ...For the STACK type User s Manual User s Manual Option Edition 24A7 E 0045 3 ...
Page 2: ......
Page 3: ...High Performance Vector Control Inverter User s Manual Option Edition ...
Page 155: ...6 5 SX Bus Interface Card 6 79 Chap 6 CONTROL OPTIONS Figure 6 5 5 ...
Page 156: ...6 80 Basic Connection Diagram Figure 6 5 6 ...
Page 344: ......
Page 346: ...For the STACK type User s Manual User s Manual Option Edition 24A7 E 0045 3 ...