INVT Goodrive35 Series User Manual

Goodrive35 Series Closed-loop Vector Control VFD Communication protocol
232
Code
Name
Definition
07H
Parameter
read-only
The parameter to be modified in the write operation of the upper
computer is a read-only parameter.
08H
Parameter
cannot be
modified in
running
The parameter to be modified in the write operation of the upper
computer cannot be modified during the running of the VFD.
09H
Password
protection
A user password is set, and the upper computer does not provide
the password to unlock the system when performing a read or write
operation. The error of "system locked" is reported.
When returning a response, the device uses a function code domain and fault address to indicate
whether it is a normal response (no error) or exception response (some errors occur). In a normal
response, the device returns the corresponding function code and data address or sub-function code.
In an exception response, the device returns a code that is equal to a normal code, but the first bit is
logic 1.
For example, if the master device transmits a request message to a slave device for reading a group
of function code address data, the code is generated as follows:
0 0 0 0 0 0 1 1 (03H in the hexadecimal form)
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 check
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 check Error code
Exception
response code
01 86 04 43 A3

INVT Goodrive35 Series Specifications

General

Brand	INVT
Model	Goodrive35 Series
Category	Controller
Language	English