Goodrive300-LIFT series inverter
Communication protocol
-128-
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:
P09.11
ACC time
0.1
–
360.0s
2.0
◎
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 monitor 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.
Inverter
address
Write
command
Parameter
address
Parameter data
CRC
01
06
09 0B 00 32
7A 41
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 monitor sends the command of reading the parameter of
hibernation restore delay time, if the response message of the inverter is as following:
Read
command
Two bytes
of data
Parameter data
CRC
01
03
02
00 32
49 E7
Inverter
address
Because the parameter data is 0032H (50) and 50 divided by 10 is 5.0, then the hibernation restore
delay time is 5.0s.
10.4.7 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
Meaning
01H
Illegal
command
The command from master cannot be executed. The reason maybe:
1. This command is only for new device;
2. Slave is in fault state and cannot execute it.
02H
Illegal data
address.
Some of the operation addresses are invalid or not allowed to access.
Especially the combination of the register and the transmitting bytes
are invalid.
03H
Illegal value
When there are invalid data in the message framed received by slave.
Note
:
This error code does not indicate the data value to write exceed
