● 00H = 0 ID address is broadcast mailing address, 128 ~ 255 reserved. 00H = 0 ID address is
broadcast mailing address, 128 ~ 255 reserved.The number of inverter can be connected is no
more than 127.
● Though the length of communication cable can add up to 1300m, considering the stability, the
length limit within 800m
● All the control signal cable use the shield cable, and is linked to the signal terminal “SH” of
RS485.
● Data packet using CRC (vertical lengthy test) frame detection to ensure data reliability.
● Completely isolated RS485communication module to ensure reliable communications,support
hot-swappable, after modular access, you can enter the work.
● The system is tested in 6 kinds of baud rate: 0:1200, 1:2400, 2:4800, 3:9600, 4:19200, 5:38400
● However, if under deteriorating environmental conditions, lowering the baud rate can improve
the communication quality.
● Interval time of sending from frame to frame is more than 50 bytes.
I-4. Communication Protocol
Communication architecture is inverter as a slave, the computer as a host.
MODBUS protocol defines a simple protocol data unit (PDU) which has nothing to do with a
basic communication layer, Specific bus or network MODBUS protocol mapping can introduce
some additional domain from application data unit (ADU).
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