Rockwell Automation 1395 Node Adapter Board - Manual (Page 37)

Chapter 3
Functional Description
3-25
Write Parameter Data This function writes a parameter value to the Drive. The Drive can accept
only one parameter at a time when using the RIO write mechanism.
PLC Block Transfer Data –
BTW Instruction Length: 6
BTR Instruction Length: 40
BTW Message Structure –
Message Header Information:
Word 1: 0
Word 2: 0
Function Code, Word 3: 515
Write Message Length, Word 4: 12 Bytes
WORD
BTW BTR
0
0
515
See Note
1
2
3
4
NOTE: Word 4 of the BTR instruction is broken down into
two bytes. The High byte contains the status bits
per table 3.B. The low byte contains the Drive
message length in bytes.
5
6
Parameter #
Parameter Status
0
0
515
See Examples
Parameter #
Parameter Data
RIO RIO
Message Operation – The WRITE PARAMETER DATA function
requests the Drive to change the value of the parameter specified in the
message to the value contained in the message. The value must be sent to
the Drive in Drive units and may need to be scaled by the PLC Controller
prior to being sent. Only 1 parameter may be changed in a single block
transfer.