iDrive2 inverters Communication protocol
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7.3.4.1 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 low byte is the number after the radix point. But both the high
byte and the low byte should be changed into hex. For example P05.05, the group number before the radix point
of the function code is 05, then the high bit of the parameter is 05, the number after the radix point 05, then the low
bit of the parameter is 05, then t he function code address is 0505H and the parameter address of P10.02 is
0A03H.
Note:
PE group is the factory parameter which can not be read or changed. Some parameters can not be changed
when the inverter is in the running state and some parameters can not be changed in any state. The setting range,
unit and relative instructions should be paid attention to when modifying the function code parameters.
Besides, EEPROM is stocked frequently, which may shorten the usage time of EEPROM. For users, some
functions are not necessary to be stocked on the communication mode. The needs can be met on by changing the
value in RAM. Changing the high bit of the function code form 0 to 1 can also realize the function. For example, the
function code P00.07 is not stocked into EEPROM. Only by changing the value in RAM can set the address to
8007H. This address can only be used in writing RAM other than reading. If it is used to read, it is an invalid
address.
7.3.4.2 The address instruction of other function in Modbus
The master can operate on the parameters of the inverter as well as control the inverter, such as running or
stopping and monitoring the working state of the inverter.
Below is the parameter list of other functions
Function instruction
Address
definition
Data meaning instruction
R/W characteristics
Communication
control command
2000H
0001H:forward running
W/R
0002H:reverse running
0003H:forward jogging
0004H:reverse jogging
0005H:stop
0006H:coast to stop (emergency stop)
0007H:fault reset
0008H:jogging stop
The address of the
communication setting
value
2001H
Communication setting
frequency(0~Fmax(unit: 0.01Hz))
W/R
2002H
PID reference, range(0~1000, 1000
corresponds to100.0% )
2003H
PID feedback, range(0~1000, 1000
corresponds to100.0% )
W/R
