Download User Manual

EDS800 series Service Manual
connected inverters increasing, following wiring is recommended:
EDS800
EDS800
CPU board
CPU board
Mainframe
Submachine
Submachine
485A 485B
485A 485B
485A 485B
Fig. 3-13
EDS800
…
CPU board
recommended wiring for multiple inverters communication (all inverters and
motors well earthed)
Normal communication still not available if using above wiring, can try to take
following measure:
1> Provide separate power supply for PLC (or upper machine) or isolate its power
supply.
2> Apply magnetic circle on the communication wire.
3> Reduce inverter carrier wave frequency properly.
note
3.7
(1) When form the network only by inverters, you must set local address parameter F2.15
of the mainframe EDS800 to 0.
(2) For programming of RS485 interface ， please refer to chapter 10 MODBUS
communication protocol.
Installation guide for anti-jamming
Main circuit of the inverter is composed of high-power semiconductor switch gear，
so some electromagnetic noise will arise during work，to reduce or stop disturbance
to environment，show you assembling method of inverter disturbance suppressing
from many aspects such as disturbance suppressing, spot wiring, system grounding,
leak current, usage of power supply filter etc. in this section to be referred to during
spot assembling.
3.7.1 Restraining to noise disturbance
Disturbance brought by the working inverter may affect nearby electronic device，
effect degree relates to surrounding electromagnetic environment of the inverter and
anti-disturbance capacity of this device.
(1) type of disturbance noise
According to work principle of the inverter, there are mainly 3 kinds of noise
disturbance source:
1> circuit conduction disturbance；
2> space emission disturbance；
20