ProSoft Technology MVI56-DFCM - Manual (Page 45)

MVI56-DFCM ♦ ControlLogix Platform Ladder Logic
DF1 Half/Full Duplex Master/Slave Serial Communication Module User Manual
ProSoft Technology, Inc. Page 45 of 106
September 24, 2014
3.6 Special Functions and Controls (DFCM.CONTROL)
The DFCMUTIL object encapsulates and organizes variables and parameters
used by the ladder logic and Add-On Instruction (AOI) to manage logic flow and
optimize backplane block transfers based on user-selected ReadData and
WriteData register counts.
Name Data Type Description
BPLastRead INT Index of last read block
BPLastWrite INT Index of last write block
BlockIndex INT Computed block offset for data table
ReadDataSize DINT Size of Read Data Array
MaxReadDlock DINT Maximum Read Block
WriteDataSize DINT Size of Write Data Array
MaxWriteBlock DINT Maximum Write Block
RBTSremainder INT Contains remainder from Read Data
array size divided by the block size
WBTSremainder INT Contains remainder from Write Data
array size divided by the block size
3.7 Adding the Module to an Existing Project
1 Select the I/O Configuration folder in the Controller Organization window of
RSLogix 5000, and then click the right mouse button to open a shortcut
menu. On the shortcut menu, choose N
EW M ODULE .