Rockwell Automation GMLC Reference Manual - Manual (Page 759)

Publication GMLC-5.2 - November 1999
722 Using the RIO Adapter Option
In the table above, the number of decimal digits is shown as a decimal
number. For example, if three decimal digits are specified in the BTW
data file (word 2 = 13xx hex) and the value of the item to be sent to the
motion controller is 15.72, the value 3D68 hex (15.72 x 10
3 = 15,720
decimal = 3D68 hex) must be stored in the data file.
Up to 60 sequential user variables or cam table points can be transferred
in any one block transfer, using 16-bit integer numeric format since each
block transfer is limited to a maximum of 64 words, as shown by the
formula below:
RIO Adapter Block Transfer Write
16-bit Integer Numeric Format
Number of
Decimal
Digits:
Multiply
PLC Values by: Maximum Representable Value in
Motion Controller:
0
1
2
3
4
5 1
10
100
1,000
10,000
100,000
±32,767.0
±3,276.7
±327.67
±32.767
±3.2767
±0.327 67
6
7
8
9
10 1,000,000
10,000,000
100,000,000
1,000,000,000
10,000,000,000
±0.032 767
±0.003 276 7
±0.000 327 67
±0.000 032 767
±0.000 003 276 7
11
12
13
14
15 100,000,000,000
1,000,000,000,000
10,000,000,000,000
100,000,000,000,000
1,000,000,000,000,000
±0.000 000 327 67
±0.000 000 032 767
±0.000 000 003 276 7
±0.000 000 000 327 67
±0.000 000 000 032 767
60 Items 1
Word
Item
-------------
×
3 Header Words End-of-Block Word
64 Words =
+ +