INVT GD300-004G-4, Operation Manual

Page: 248 / 312

Goodrive300 inverters Communication protocol
247
Sub-function Code Description
0000 Return to inquire information data
For example: The inquiry information string is same as the response information string when
the loop detection to address 01H of driver is carried out.
The RTU request command is:
START T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR 01H
CMD 08H
High bit of sub-function code 00H
Low bit of sub-function code 00H
High bit of data content 12H
Low bit of data content ABH
Low bit of CRC ADH
High bit of CRC 14H
END T1-T2-T3-T4 (transmission time of 3.5 bytes)
The RTU response command is:
START T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR 01H
CMD 08H
High bit of sub-function code 00H
Low bit of sub-function code 00H
High bit of data content 12H
Low bit of data content ABH
Low bit of CRC ADH
High bit of CRC 14H
END T1-T2-T3-T4 (transmission time of 3.5 bytes)
10.4.4 The definition of data address
The address definition of the communication data in this part is to control the running of the
inverter and get the state information and relative function parameters of the inverter.
10.4.4.1 The rules of parameter address of the function codes
The parameter address occupies 2 bytes with the fact that the high bit is in the front and the
low bit is in the behind. The range of high and low byte are: high byte
—
00~ffH; low byte
—
00~ffH. The high byte is the group number before the radix point of the function code and the