There are three ways to start the device monitor screen:
Start from the System Menu
Touch the top right corner, and then the bottom left corner (or bottom left corner→top right corner) on the display unit screen within 0.5 seconds.
The system menu displays. Touch [Device Monitor] to display the device monitor screen.
Start with a Switch to start the device monitor.
Create and place the switch for device monitor start in advance.
From the [Parts (P)] menu, point to [Switch/Lamp (C)] and select [Special Switch (P)], or click 
, and place the Switch on the screen.
Triggering with System Variables
Turn ON the system variable #H_DeviceMonitor.