Rockwell Automation GMLC Reference Manual - Manual (Page 750)

Publication GMLC-5.2 - November 1999
Using Block Transfers 713
First Data Item
When transferring only one item, the specific item (of the type specified
by word 0 of the data file) is specified in word 1 of the data file. When
transferring multiple user variables or cam table points in a single block
transfer, the first (lowest numbered) item is specified in word 1, as shown
in the table below. Put the appropriate value from the table in word 1 of
the BTW data file.
When more than one user variable or cam table value is sent to or gotten
from the motion controller in a single block transfer, word 1 of the BTW
data file specifies the first item to be transferred. See Number and Format
of Items for more information on specifying the number of items.
For example, to send a position value for axis 2 from the PLC to point 100
in the master cam table in the motion controller:
1. Put 7B23 in word 0 of the BTW data file.
RIO Adapter Block Transfer Write First Data Item
(Data File Word 1)
Word 0
(Hex)
Word 1 Description
Word 1 Value Range
Hex Decimal
7x00 User Variable Number
(V3.0 or later firmware) 0 – 03E7
0 – 07CF 0 – 999
0 – 1,999
7xx1 Data Parameter Number 0 – 0081 0 – 129
7xx2 Data Bit Number 0 – 003C 0 – 60
7xx3 Master Cam Position
(V3.0 or later firmware) 0 – 07CF
0 – 32C7 0 – 1,999
0 – 12,999
7xx4 Master Cam Table
(V3.0 or later firmware) 0 – 07CF
0 – 32C7 0 – 1,999
0 – 12,999
7xx5 Slave Cam Table Point
(V3.0 or later firmware) 0 – 07CF
0 – 32C7 0 – 1,999
0 – 12,999
7Dx6 System Variable 0 – 0010 0 – 16