ProSoft Technology MVI56E-MNETC - Manual (Page 118)

Guide to the MVI56E-MNETC User Manual MVI56E-MNETC ♦ ControlLogix Platform
User Manual Modbus TCP/IP Client Enhanced Communication Module
Page 118 of 183 ProSoft Technology, Inc.
February 3, 2013
Select Priority Read Block = 0
After the ladder logic changes the value of Local:1:O.Data[247] from 5 to 0, then
the Local:1:I.Data[249] value is updated as before, by returning all blocks 1
through 10 in a repeating sequence.
5.2.2 Special Function Blocks
Special function blocks are optional blocks used to request special tasks from the
module.
Initialize Output Data Blocks (1000 to 1049)
Use the Initialize Output Data parameter in the configuration to bring the module
to a known state after a restart operation. If the Initialize Output Data parameter
is enabled, when the module performs a restart operation, it will request blocks of
output data from the ReadData array in the processor to initialize the Read Data
area of the module’s internal database.
CLX Processor
Read
Tags
Local:X:I
Local:X:O
MNET Module
Normal Data transfer
Modbus
Output
Modbus
Input
Write
Tags
CLX Processor
Read
Tags
Local:X:I
Local:X:O
MNET Module
Initialize Output Data transfer
Modbus
Output
Modbus
Input
Write
Tags