INVT Goodrive3000 GD3000-01-055G-12 Operation Manual page 213

Goodrive3000 series medium voltage inverters
reference", it is necessary to set P09.00 to "MODBUS communication setting".
The encoding rules for device codes (corresponds to identifying code 2103H of the inverter)
High 8 bit
01
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
the table as the example:
Function
Name
code
Hibernation
P01.20 restore delay
time
Restart after
P01.21
power off
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.
After the inverter 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 inverter is as follows:
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 inverter will return a fault response message.
The fault message is from the inverter to the master, its code and meaning is as below:
Code Name
Illegal
01H
command
Meaning Low 8 bit
GD 0x0110
Detailed instruction of parameters Setting range
0.0~3600.0s (valid when P01.19=2)
0: Disabled
1: Enabled
Table 8-3 Meaning of fault message
The command from master cannot be executed. The reason may be:
1. This command is only for new device;
2. Slave is in fault state and cannot execute it.
GD3000PWM converter
0.0~3600.0
0~1
Meaning
-212-
MODBUS protocol
Meaning
n
. Take
Default
Modify No.
value
○
0.0s 39.
○
0 40.