Goodrive600 series high-performance multifunction VFD
Communication networking
-125-
RTU slave response (sent from the VFD to the master):
START
T1-T2-T3-T4 (time gap with a min. length of 3.5 bytes)
ADDR
02H
CMD
10H
High-order bit of data writing address
00H
Low-order bit of data writing address
04H
Data count high-order bit
00H
Data count low-order bit
02H
CRC low-order bit
C5H
CRC high-order bit
6EH
END
T1-T2-T3-T4 (time gap with a min. length of 3.5 bytes)
6.3.4 Data address definition
This section describes the address definition of communication data. The addresses are used for controlling the running,
obtaining the status information, and setting function parameters of the VFD.
6.3.4.1 Function code address format rules
The address of a function code consists of two bytes, with the high-order bit on the left and low-order bit on the right. The
high-order bit ranges from 00 to ffH, and the low-order bit also ranges from 00 to ffH. The high-order bit is the
hexadecimal form of the group number before the dot mark, and low-order bit is that of the number behind the dot mark.
Take P05.02 as an example: The group number is 05, that is, the high-order bit of the parameter address is the
hexadecimal form of 05; and the number behind the dot mark is 02, that is, the low-order bit is the hexadecimal form of
02. Therefore, the function code address is 0502H in the hexadecimal form. For example, the parameter address of
P10.01 is 0A01H.
Function
code
Name
Description
Default
P10.00
Simple PLC mode
0: Stop after running once
1: Keep running with the final value after
running once
2: Cyclic running
0
P10.01
Simple PLC memory selection
0: Without memory after power-off
1: With memory after power-off
0
Note:
The parameters in the P99 group are set by the manufacturer and cannot be read or modified. Some parameters
cannot be modified when the VFD is running; some cannot be modified regardless of the VFD status. Pay attention to
the setting range, unit, and description of a parameter when modifying it.
The service life of the Electrically Erasable Programmable Read-Only Memory (EEPROM) may be reduced if it is
frequently used for storage. Some function codes do not need to be stored during communication. The application
requirements can be met by modifying the value of the on-chip RAM, that is, modifying the MSB of the corresponding
function code address from 0 to 1. For example, if P00.07 is not to be stored in the EEPROM, you need only to modify
the value in the RAM, that is, set the address to 8007H. The address can be used only for writing data to the on-chip
RAM, and it is invalid when used for reading data.
6.3.4.2 Addresses of other Modbus functions
In addition to modifying the parameters of the VFD, the master can also control the VFD, such as starting and stopping it,
