DRV-28 inverter
s Communication protocol
-273-
Inverter
address
Write
command
Parameter
address
Parameter
data
CRC
01
06
00 01
00 03
98 0B
But the setting range of the "Running command channel" is 0 to 2. The value 3 exceeds the setting
range. In this case, the inverter returns an error message response as shown in the following:
Inverter
address
CRC
Error code
Exception
response code
01
86
04
43 A3
The exception response code 86H (generated based on the MSB "1" of the write command 06H)
indicates that it is an exception response to the write command (06H). The error code is 04H. From
the preceding table, we can see that it indicates the error "Operation failure", which means "The
parameter is set to an invalid value in the write operation".
9.4.8 Read/Write operation example
For the formats of the read and write commands, see sections 9.4.1 and 9.4.2.
9.4.8.1 Read command 03H examples
Example 1: Read state word 1 of the inverter whose address is 01H. From the table of other function
parameters, we can see that the parameter address of state word 1 of the inverter is 2100H.
The read command transmitted to the inverter is as follows:
Read
command
Inverter
address
CRC
Parameter
address
Data quantity
01
03
21 00
00 01
8E 36
Assume that the following response is returned:
Read
command
Number
of bytes
Data content
CRC
Inverter
address
01
03
02
00 03
F8 45
The data content returned by the inverter is 0003H, which indicates that the inverter is in the stopped
state.
Example 2: View information about the inverter whose address is 03H, including "Type of current
fault" (P07.27) to "Type of last but four fault" (P07.32) of which the parameter addresses are 071BH to
0720H (contiguous 6 parameter addresses starting from 071BH).
The command transmitted to the inverter is as follows:
Inverter
address
Read
command
Start
address
6 parameters in total
CRC
03
03
07 1B
00 06
B5 59
Assume that the following response is returned:
