4 The tree under [ NewPLC1] will open. Select the Serial Communication Unit. ([SCU[0]] in the figure on the right). 5 In the Project window, select the [Trace2] icon ( ). (Verify that [Trace 2] is highlighted as shown on the right) * [Trace 2] corresponds to "Port 2" of the serial communication unit. 6 From the Menu bar, select [PLC] - [Start Trace] － [One-shot Trace]. 7 Confirm that the status of [Trace 2] in the Project Window is [One-shot Trace Running]. 41