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CFW-08 OPTIONS AND ACCESSORIES
Query (Master)
Slave address
Function
MEI Type
Read Code
Object Number
CRC-
CRC+
Response (Slave)
Slave address
Function
MEI Type
Conformity Level
More Follows
Next Object
Number of Objects
Object Code*
Object length*
Object Value*
CRC-
CRC+
The fields are repeated according to the number of objects.
This function permits reading of three information categories:
Basic, Regular and Extended and each category are formed by a group of
objects. Each object is formed by a sequence of ASCII characters For the
CFW-08 are only available basic information formed by three objects:
Object 00 - VendorName: always ‘WEG’.
Object 01 - ProductCode: formed by the product code (CFW-08), plus
the rated inverter current.
Object 02 - MajorMinorRevision: it indicates the inverter firmware
version, in ‘VX.XX’ format.
The read code indicates which information categories are being read and
if the objects are accessed individually of by sequence.
In the example, the inverter supports 01 (basic information in sequence),
and 04 (individual access to the objects).
The other fields for the CFW-08 have fixed values.
Example: read o basic information in sequence, starting from object
00, of a CFW-08 at address 1:
Query (Master)
Field Value
Slave address 01h
Function 2Bh
MEI Type 0Eh
Read Code 01h
Object Number 00h
CRC- 70h
CRC+ 77h
Response (Slave)
Field Value
Slave address 01h
Function 2Bh
MEI Type 0Eh
Read Code 01h
Conformity Level 51h
More Follows 00h
Next Object 00h
Number of Objects 03h
Object Code 00h
Object Length 03h
Object Value ‘WEG’
Object Code 01h
Object Length 0Eh
Object Value ‘CFW-08 7.0A’
Object Code 02h
Object Length 05h
Object Value ‘V3.77’
CRC- C7h
CRC+ DEh
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