Rockwell Automation 1203 Serial Communications Module Series B - Manual (Page 57)

5–9 Block Transfer Emulation Instructions
1203–5.5 September 1995
Message Structure (Continued)
Data
Word 15
Data
Word 16
File, Group, Element
Minimum Value
Drive Response
Data
Word 17
Data
Word 18
Maximum Value
Default Value
Data
Word 19
Unit Text
Char 2 Char 1
Data
Word 20
Unit Text
Char 4 Char 3
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 1 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. N10:10 shows the header message for the
request. The data is returned in the response data file, starting with
word 1, for parameter 20. Word 1 shows the present value in drive
units. Word 2 through word 6 provide scaling information, used to
convert drive units to engineering units for the Human Interface
Module (HIM). Word 7 through word 14 provide the parameter
name.