Posted 4 Mar 2019 Hello , I'm using Allen Bradley Micro850 - 2080-LC50-24QWB PLC. I downloaded a program to that PLC by CCW. My customer wants to build an application (like a GUI) on a PC which ables to read and write the I/O's , therefore he needs me to send him the registers of the I/O's that i have used in the program. so i woule like to know the register for every tag or I/O. where can i get that information from? for example , i would like to read : _IO_EM_DI_00 , how could i know what this tag's modbus register is? thanks in advance. Share this post Link to post Share on other sites
Posted 8 Mar 2019 I believe in CCW you need to map all the Modbus I/O. If you double click the processor and open it up you will see a tab for "Modbus Mapping" There you can select each variable, physical I/O, etc. and assign the Modbus address. Share this post Link to post Share on other sites