ProSoft Technology MVI56-AFC - Manual (Page 206)

MVI56-AFC Sample Logic MVI56-AFC ♦ ControlLogix Platform
User Manual Liquid and Gas Flow Computer
Page 206 of 316 ProSoft Technology, Inc.
February 25, 2011
12.1 Sample Logic Overview
The logic basically sends output blocks to the MVI56-AFC and receives the input
blocks from the module. Each block contains a Block Sequence number that
identifies the block. The input response block sent by the module will also contain
the same Block Sequence Number as the previous output block.
The ladder logic performs the following sequence:
1 Receives the input block from the MVI56-AFC
2 Copies the input block content from the input buffer to the controller tags
based on the Block Sequence Number
3 Increments the next Block Sequence Number
4 Builds the next output block with the new Sequence Number
5 Sends the new output block to the module.