Appendix 1 Serial Port 485 Communication Protocol - SHENZHEN ENCOM ELECTRIC TECHNOLOGIES CO. enc eds800-2s0002n User Manual

Appendix 1 Serial port 485 communication protocol

1.1 Summarization
We provide general RS485/RS232 communication interface in our
inverters(such as EDS2000 series， EDS2800 series， EDS1000 series etc.) for the user.
Through this communication interface upper device (such as PC, PLC controller etc.)
can perform centralized monitor to the inverter (such as to set inverter parameter,
control run of inverter, read work state of the inverter) and also long-distance control
keypad can be connected to realize various usage requirement of the user.
This communication protocol is interface criterion file designed for realizing
above-mentioned function, please read it earnestly and program according to it so
that realize long-distance and network control to the inverter.
1.2 Protocol content and description
1.2.1 Communication net buildup mode
mainframe is PC
RS232
conversion module
RS485
EDS800
1.2.2 Communication mode
At present, EDS800 inverter can be used only as auxiliary device in 485 net.
Can realize communication between inverters through PC or PLC if it's needed.
Specific communication mode is as mentioned below:
(1) PC or PLC as mainframe，inverter as auxiliary device，point-to-point
communication between mainframe and auxiliary device.
(2) Auxiliary device don't response when mainframe send out command by
broadcast address.
(3) User can set local address, baud rate and data format of the inverter through
auxiliary device keypad or serial communication mode.
(4) Auxiliary device report current failure information to mainframe in the last
EDS800 series Service Manual
or
mainframe is PLC
232-485
EDS800 EDS1000
Fig.1 Net buildup graph
EDS800 mainframe
or
EDS1000
123