Rockwell Automation 1203-CN1 ControlNet Communications Module 1203-CN1 - Manual (Page 124)

Publication 1203-5.13 – February, 2002
F-6 Supported Emulated Block Transfer Commands: Parameter Read Full
Message Operation
Parameter Read Full retrieves the attributes of the specified
parameter. The attributes for each parameter include the data,
minimum and maximum values, and the parameter text. The response
message returns this information.
If an error has occurred in reading any of the values, word 3 contains
the status word.
The parameter text is returned with each data word containing two
ASCII characters per word. The first and second characters are in
opposite order.
Example
In this example, a Parameter Read Full was performed through
block transfer on a 1336 PLUS drive. N10:10 shows the header
message for the request. The data is returned in the response data file,
starting with word 3, for parameter 20. Word 3 shows the present
value in drive units. Word 4 through word 8 provide scaling
information, used to convert drive units to engineering units for the
Human Interface Module (HIM). Word 9 through word 16 provide the
parameter name.
Message Structure (Continued)
Drive Response
Data
Word 19
Data
Word 20
Maximum Value
Default Value
Data
Word 21
Unit Text
Char 2 Char 1
Data
Word 22
Char 4 Char 3
Data
Word 17
Data
Word 18
File, Group, Element
Minimum Value