CHAPTER 8 - CFW-09 OPTIONS AND ACCESSORIES
In the example the Object Value has not been represented as hexadecimal
value, but with correspondingASCII characters.
For instance, for the object 00, the 'WEG' value has been transmitted as
being three ASCII characters, that as hexadecimal have the values 57h (W),
Errors can occur during the message transmission on network, or in the
content of the receivedmessages. Depending on the error type, inverter may
answer or not to the master:
When the master sends a message to an inverter configured at determined
network address, the inverter will not response if:
Timeout between transmitted bytes (3.5 times the time required for
the transmission of an 11-bit word).
In the case of a successful reception of the message, the inverter can detect
problems and send an error message to the master indicating the problem
Invalid function (error code = 1): the requested function has not been
implemented for the inverter.
Invalid data address (error code = 2): the data address (register or bit)
Data value invalid (error code = 3): this error occurs in the following
Value is out of permitted range.
Writing in data that cannot be changed (only read register, or register
that doesnot allow changing with enabledinverteror bits of logic status).
Writing in function of the logic command that has not been enabled
When anyerror occurs in the message content (not duringthe data transfer),
the slave must return a message indicating the error type that occurred. The
errors that may occur in the CFW-08 during the message processing are
errors relatingto invalid function (code01), invalid data address (code02) and
invalid datavalue (code03).
The messages sent bythe slave have following structure:
(with most significant bit to 1)
Master requests from the slave at address 1 to write parameter 89
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