ProSoft Technology MVI56-AFC - Manual (Page 194)

MVI56-AFC Backplane Communication MVI56-AFC ♦ ControlLogix Platform
User Manual Liquid and Gas Flow Computer
Page 194 of 316 ProSoft Technology, Inc.
February 25, 2011
Function Code 18: Read Modbus Registers from the PRIMARY Slave INPUT
register bank.
Function Code 19: Read Modbus Registers from the VIRTUAL Slave INPUT
register bank.
Input Function Block ID
When the AFC completes processing the output function block, the input
Function Block ID is returned with the Modbus Message Block as described in
more detail below. The AFC provides a number of indicators to allow you to
design the Processor logic to take appropriate action once the controller receives
the message in the returned IFB.
Function Block Name: Modbus Gateway Read
Function Block ID: 16 through 19
Target: Global
Data Block Length: User defined - from 2 to 244
Total Block Length: (User defined +1) Elements