５ Demonstration Procedures ５ - １ Monitoring on Safety I/O LEDs You can check LED statuses of the safety I/O units on NA without opening a control panel. The procedure is shown below. Precautions for Correct Use It is not possible to monitor I/O status of safety CPU and ordinary I/O units. 24 5-1-1 Check the Unit LED Status 1. Press [Safety CPU Demo Screen]. 2. I/O Table Screen for the connected controllers appears. If six or more units are installed, press the button [◀] or [▶] to move to the right or left page. 3. Press the I/O Monitor button for the I/O unit you want to check. The button enclosed in a yellow frame is for the NX-SID800, in the slot No2. 4.
The status of the selected I/O unit is indicated. Press the [◀] or [▶] buttons to see other I/O units. The display is automatically updated at 1 second interval.