INVT GD3000-01-055G-12, Руководство по эксплуатации

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Goodrive3000 series medium voltage VFD MODBUS protocol
-261-
High 8 bit Meaning Low 8 bit Meaning
01 GD 0x0110 GD3000 PWM VFD
8.4.5 Fieldbus ratio values
The communication data is expressed by hex in actual application and there is no radix point in hex. For
example, 50.12Hz cannot be expressed by hex so 50.12 can be magnified by 100 times into 5012, so
hex 1394H can be used to express 50.12.
A non-integer can be timed by a multiple to get an integer and the integer can be called fieldbus ratio
values.
The fieldbus ratio values are referred to the radix point of the setting range or default value in the function
parameter list. If there are figures behind the radix point (n=1), then the fieldbus ratio value m is 10
n
. Take
the table as the example:
Function
code
Name Description Setting range Default Modify
P01.20
Hibernation
restore delay
time
0.0
–
3600.0s (valid when P01.19=2) 0.0
–3600.0
0.0s
○
P01.21
Restart after
power off
0: Disabled
1: Enabled
0
–1
0
○
If there is one figure behind the radix point in the setting range or the default value, then the fieldbus ratio
value is 10. If the data received by the upper computer is 50, then the "hibernation restore delay time" is
5.0 (5.0=50÷10).
If MODBUS communication is used to control the hibernation restore delay time as 5.0s. Firstly, 5.0 can
be magnified by 10 times to integer 50 (32H) and then this data can be sent.
VFD
address
Write
command
Parameter
address
Parameter
data
CRC
01 06 01 14 00 32 49 E7
After the VFD receives the command, it will change 50 into 5.0 according to the fieldbus ratio value and
then set the hibernation restore delay time as 5.0s.
Another example, after the upper computer sends the command of reading the parameter of hibernation
restore delay time, the response message of the VFD is as follows:
VFD
address
Write
command
Parameter
data
CRC
2-byte
data
01 03 02 00 32 39 91
Because the parameter data is 0032H (50) and 50 divided by 10 is 5.0, then the hibernation restore delay
time is 5.0s.
8.4.6 Fault message response
There may be fault in the communication control. For example, some parameter can only be read. If a
writing message is sent, the VFD will return a fault response message.
The fault message is from the VFD to the master, its code and meaning is as follows: