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The inverter can either used as a host or slave in RS485 network. It can be used for
controlling our other inverters as host to achieve multi-level linkage, or controlled by host
(PC or PLC) as a slave. The specific communication mode as follows:
1)
Inverter is used as slave, in point-to-point communication of master-slave mode.
Host sends commands from broadcast address, while slave doesn’t answer.
2)
Inverter is used as host, sending commands from broadcast address, while slave
doesn’t answer.
3)
The address, baud rate and data format of the inverter can be setup by using the
keyboard or the serial communication.
4)
message of error is reported by slave, in the recent response frame against host
polling
9.2.3
Communication Interface
The communication is using RS485 interface, with asynchronous serial and half-duplex
transmission. The default communication protocol is in RTU mode.
The default data format: 1 start bit, 7 data bits, 2 stop bits.
The default rate is 9600bps. Communication parameter settings reference P3.09 ~ P3.12
function code.
9.3 RTU protocol
Character structure:
11 characters box
（
For RTU
）
(1-8-2 format, no parity)
Start
1
2
3
4
5
6
7
Stop
Stop
Summary of Contents for DGI900
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