INVT 11020-00136, Operation Manual

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Goodrive600 series high-performance multifunction VFD Communication networking
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For a normal response, the same code is returned.
For an exception response, the following code is returned:
1 0 0 0 0 0 1 1 (83H in the hexadecimal form)
In addition to the modification of the code, the slave returns a byte of exception code that describes the cause of the
exception. After receiving the exception response, the typical processing of the master device is to transmit the request
message again or modify the command based on the fault information.
For example, to set the "Running command channel" (P00.01, the parameter address is 0001H) of the VFD whose
address is 01H to 03, the command is as follows:
VFD
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 VFD returns an error message response as shown in the following:
VFD
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".
6.3.7 Read/Write operation examples
For the formats of the read and write commands, see sections 6.3.3.1 and 6.3.3.2.
6.3.7.1 Examples of read command 03H
Example 1: Read state word 1 of the VFD whose address is 01H. According to the table of other Modbus function
addresses, the parameter address of state word 1 of the VFD is 2100H.
The read command transmitted to the VFD is as follows:
Read
command
VFD
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
VFD
address
01 03 02 00 03 F8 45
The data content returned by the VFD is 0003H, which indicates that the VFD is in the stopped state.
Example 2: View information about the VFD whose address is 03H, including "Type of current fault" (P07.27) to "Type of
5th-last fault" (P07.32) of which the parameter addresses are 071BH to 0720H (contiguous 6 parameter addresses
starting from 071BH).