INVT Goodrive20-EU VFD Series, Руководство по эксплуатации

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Goodrive20-EU Series VFD Communication protocol
-137-
will return:
1 0 0 0 0 0 1 1 (Hex 83H)
Besides the function codes modification for the objection fault, the slave will respond a byte of
abnormal code which defines the error reason.
When the master receives the response for the objection, in a typical processing, it will send
the message again or modify the corresponding order.
For example, set the "running command channel" of the VFD (P00.01, parameter address is
0001H) with the address of 01H to 03, the command is as following:
VFD
address
Write
command
Parameters
address
Parameters
data
CRC check
But the setting range of "running command channel" is 0
–2, if it is set to 3, because the
number is beyond the range, the VFD will return fault response message as below:
VFD
address
CRC check Fault code
Abnormal
response code
Abnormal response code 86H means the abnormal response to writing command 06H; the
fault code is 04H. In the table above, its name is operation failed and its meaning is that the
parameter setting in parameter writing is invalid. For example, the function input terminal
cannot be set repeatedly.
7.5 Read/Write operation example
7.5.1 Examples of reading command 03H
Example 1: Read the state word 1 of the VFD with the address of 01H (see section 7.4.2
"Description of other function addresses in Modbus"). The parameter address of the state
word 1 of the VFD is 2100H.
RTU mode:
The command sent to the VFD:
Read
command
VFD
address
CRC check
Parameters
address
Data number
If the operation succeeds, the response message is as follows:
Read
command
Data
address
Data content CRC check
VFD
address