Rockwell Automation 1395 ControlNet Communication Board - Manual (Page 35)

3–21 Configuration & PLC Interfacing
Publication 1395–5.37– March, 1999
Read Parameter Full This function reads the full parameter description from the Drive based
(Value, Min, Max, Descriptor, Text) on a parameter number provided by the PLC Program. The description
includes the actual value, minimum value, maximum value, descriptor,
and the parameter text.
PLC Block Transfer Instruction Data –
Write Read
Size In Elements: 5 25
Processor Type: PLC–5 PLC–5
Destination Address: N40:0–4 N40:0–24
Message Structure –
0
PLC Message Write PLC Message Read
NOTE: Word 4 of the PLC Message Read instruction is broken down
into two bytes. The High byte contains the status bits
The Low byte contains the Drive message length in bytes.
Header
Word 1
0
Function Code
770
Message Length
10 bytes
Header
Word 2
Header
Word 3
Header
Word 4
Data
Word 5
Parameter #
0
Header
Word 1
0
Function Code
770
See Note
Header
Word 2
Header
Word 3
Header
Word 4
Parameter
Data
Data
Word 5
Parameter #
Data
Word 6
Minimum
Value Data
Word 7
Data
Word 8
– –
Parameter
Text Data
Word 10
Maximum
Value
Data
Word 17
Descriptor
Data
Word 9
Parameter
Text
Message Operation – The READ PARAMETER FULL function
requests the Drive to provide the full description of a parameter for use
in the PLC Controller. This information includes the actual value,
minimum value, maximum value, descriptor, and the parameter text.