Data Storage

Data Storage (DS) is a feature that is available from IO-Link Revision 1.1 onwards. When an IO-Link device supports Data Storage, the Data Storage Backup/Restore function is used when ADC is disabled. Data Storage Backup/Restore automatically backs up IO-Link device configuration to the IO-Link master and automatically restores stored values to the device during device replacement.

Device configuration is backed up to the IO-Link master module when one of the following conditions is met:

There is no Data Storage copy for the device type on the port of the IO-Link master module.
The Data Storage copy that is stored in the port of the IO-Link master module is cleared in the following scenarios:
The IO-Link master module is in the out-of-box state. All ports are cleared.
The IO-Link master module is reset to factory default. All ports are cleared.
An IO-Link master module channel mode is changed from “IO-Link”, “Digital Input, Fallback”, or “Digital Input, Timestamp, Fallback” to any non IO-Link modes (for example, “Digital Input” or “Digital Output”) and the configuration is downloaded to the module.
When a connection to another IO-Link device type (different IO-Link Vendor ID, IO-Link Device ID, or IO-Link Revision) is established on the port.
Device configuration has been updated and the DS_UPLOAD_FLAG is set in the IO-Link device.
The DS_UPLOAD_FLAG is set in the IO-Link device when the
ParamDownloadStore
command (IO-Link index 02, value 0x05) is sent to the device.
TIP: A successful device connection establishment, online application of device configuration/reconfiguration, or reconfiguration instruction in the ladder program automatically triggers Data Storage Backup as needed.

The Data Storage copy that is stored on a port of the IO-Link master module is restored to the device attached to the port when the device type matches and one of the following conditions is met.

An IO-Link device in the factory default state is connected to the IO-Link master module.
The DS_UPLOAD_FLAG is not set in the IO-Link device.
The DS_UPLOAD_FLAG is stored in nonvolatile memory and is cleared in the IO-Link device in one of the following scenarios.
The flag is cleared automatically after a successful Data Storage Backup or Data Storage Restore operation.
The flag is cleared after resetting the device to factory default or out-of-box state.

You can check whether the Data Storage copy in the IO-Link master module is synchronized with the IO-Link device by checking the Data Storage Match status in the Device Info view of the device Module Properties window.