The I/O device editor is run is a separate box. It is used for declaring and setting up I/O devices, and establish the link between the application variables and physiqual equipment.

The list shows the possible slot numbers between 0 and 255. Select a slot and:

• Hit ENTER for selecting or changing the type of I/O device to be put on this slot. In the selection box, I/O devices are sorted by categories. Select the All choice for displaying the full list of available devices. The description note of the selected device is displayed in the selection window. Double-click on a device or hit ENTER to select it. Press ESCAPE to cancel the operation.
• Run Edit / Rename menu command to change the name of the device. You can freely give any name to each I/O device.
• Hit Alt+ENTER or run Edit / Properties menu command to setup the physical properties of the device. Refer to OEM instructions for detailed explanation about I/O device properties.
• Hit SPACE bar to set the selected I/O device as Virtual or Real (normal). A virtual device is disconnected from physical operations and is managed as group of internal variables at run-time Using virtual devices enables you to test your application even if the actual hardware is not available. Virtual devices are marked in blue and between parenthesis in the device list:

There can be either simple or complex I/O devices. A simple I/O device is a group of I/O channel. All channels of the group have consistent data types, the same direction (input or output), and are numbered from 0. A complex I/O device is a list of simple devices, and generally represents a mixed type/direction equipment.

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