The new version 8.55 of the Tag List now supports the configuration of the MCT for the LC700/DF65.

What is MCT?

MODBUS Cross Table (MCT) is a technique to optimize variable MODBUS addresses that can significantly increase the speed of MODBUS drivers when accessing variables in a Smar LC700 or DF65 system.

In case of large applications where many of the used variables have MODBUS addresses separated by large distance, causes the communication driver to issue many MODBUS commands to finally grab a desired set of variables. The more spread the variables are the higher the number of commands issued to have them accessed. MCT is designed to group the most used variables in a more efficient way.

Can standard MODBUS drivers still be used?

The MCT creates a new associated address to a group of variables frequently used. All variables in the MCT continue to be reached using standard MODBUS commands, consequently any MODBUS drivers can accesses them. The difference is that once they are aligned, the MODBUS drivers can get the variable more efficiently.

Which devices are taking advantage of this technique?

Today the only device at Smar taking advantage of the MCT is the LC700/DF65 (Universal Hybrid Controller).

Main Features :