AB Control Logix 5000 Hw 1756, 5556 Logix Control Net New project On left I O Configuration right click to add modules Check firmware no. I.e. 2.5 on side of module, and model no. While adding v hav to enter it On left Task->Main Task->Main Program-> Main Routine double click e e e e beside Rungs means Error in rung will appear if Elements like PB coil not assigned addresses. To assign addr right click on element Alias Local1:Idata0 (its on main Shaashi Local PLC not Remote) I input, 0 first bit. After assigning it will apear in Controller Tags Folder on Left of main screen. After No Error Save program Open RS linx RS232 communication, ->Configure Driver-> choose in Available Drivers-> AB DF1 RS232 Devices-> Com Port, Baud Rate, Parity etc will b asked Just set right Port n press AUTO CONFIGURE. It will show successful. Close it then u will see in Configure driver window its in Running status. Click OK Go to top menu Communication->WHO ACTIVE select...