ProSoft Technology PTQ-AFC User Manual
Page 83
PTQ-AFC ♦ Modicon Quantum Platform
Quick Start
Liquid and Gas Flow Computer for Hydrocarbon Products
User Manual
ProSoft Technology, Inc.
Page 83 of 259
June 23, 2011
Because these addresses are not contiguous, the Modbus Master would have to
use five commands to poll all the data directly from the Primary Modbus Slave as
follows:
However, using the Virtual Modbus Slave optimizes the polling of data because
the registers can be remapped in any order using the AFC Manager (Site
Configuration window). The following illustration shows how the orifice diameter
registers could be remapped to the Virtual Slave starting at address Vh00100:
The following table shows how the addresses would be remapped between both
slaves:
Primary Modbus Slave Addresses
Virtual Modbus Slave Addresses
8162 and 8163
100 and 101
10162 and 10163
102 and 103
12162 and 12163
104 and 105
14162 and 14163
106 and 107
16162 and 16163
108 and 109