Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 155)

Publication 1756-UM534B-EN-P - November 2010 155
Block Transfer Module Templates Appendix C
Block Transfer Lengths
A block transfer has three lengths associated with it.
CfgLen
The configuration length, ’CfgLen’, is the length of the additional
configuration block transfer write data sent once to the block transfer module
to initialize it.
BtwLen
The block transfer write length, ’BtwLen’, is the length of the block transfer
write sent to the module during normal data update.
BtrLen
The block transfer read length, ’BtrLen’, is the length of the block transfer read
received from the module during normal data update. Default Configuration
Data Values
The template usually contains default values for the configuration block
transfer write.
CfgData
Each value consists of the keyword ’CfgData’, an offset enclosed in square
brackets, an equal sign, and the data value.
Offset Value
The offset is an offset into the configuration block transfer write and ranges
from 0…(BtwLen+CfgLen-1).
Data Value
The data value can be expressed in decimal or hexadecimal (leading 0x, as
shown in the example above).
EXAMPLE
CfgData[ 8]=0x0fff