Goodrive300-19 series open loop vector inverter special for hosit Communication protocol
-223-
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 refered 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
(m=10). Take the table as the example:
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.
10.4.6 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:
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