Salicru CV50-008-4F, Руководство пользователя

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120 - 144 Communication Protocol
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 10n. 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 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.
After the inverter receives the command, it will change 50 into 5 according to the fieldbus ratio value and then
set the hibernation restore delay time as 5s.
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:
Because the parameter data is 0032H (50) and 50 divided by 10 is 5, then the hibernation restore delay time is 5s.
9.5.4 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 can not be executed. The reason maybe:
1. This command is only for new version and this version can not realize.
2. Slave is in fault state and can not 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 the
range, but indicate the message frame is an illegal frame.
04H
Operation
failed
The parameter setting in parameter writing is invalid. For example, the function
input terminal can not be set repeatedly.
05H
Password
error
The password written to the password check address is not same as the
password set by P7.00.
06H Data frame In the frame message sent by the upper monitor, the length of the digital frame