I/O devices

I/O devices are grouped into units (physical boxes), which in turn are grouped into a string. You can create, edit or delete the I/O devices for a selected string. When the string is connected to a controller, the I/O devices can be logically defined through the physical connection not only to the controller, but also to any processors that are physically reachable through the connected controller. See Connecting devices to controllers for details.

There are different possibilities to open the I/O Device List:

  • Select a string from the configuration diagram and select I/O Devices … from its context menu , or choose String... from the Edit menu, select a string, press OK and then click on the I/O Devices... button in the String dialog.
  • Press the I/O Devices... button in the Control Unit List dialog; note that the I/O Device List dialog will not display the Create... or Delete... buttons when called this way.
  • Choose Device... from the Edit menu and select a device name or a range of devices from the list that appears. Note that you can rearrange and filter the list according to your needs. Clicking OK causes the String dialog to appear. In this dialog, click on the I/O Devices... button.
Figure 1. I/O Device List
I/O Device List. This dialog is accessible from the HCM product and includes accessible help information.

The I/O Device List dialog allows you to display the serial numbers and VOLSERs, device descriptions, control unit numbers and further information about devices in the list box by clicking the Columns… button to include selected columns into the list.

You can open related dialogs to create, edit or delete I/O devices by selecting one or more devices from the list box and pressing the appropriate button.

Note that you can access the I/O Device <=> Processor Definition dialog by pressing the Dev <=>Proc ... button. This dialog allows you to select one or more processors from a list to which you define your selected device. For XMP processors, there will be one line per CSS in the list. See Making a custom connection.

Note: You can edit the device connected to the switch control unit by accessing the Controller dialog.

For more details, see Editing switch attributes.