Siemens SIMATIC Distributed I/O ET 200eco PN Operating Instructions Manual page 216

The status of the IO-Link devices or IO-Link ports stored in the IO-Link master can be restored
with the "LIOLink_Master" function block.
As a result, the IO-Link ports and the IO-Link master are configured with the values stored in
the master backup.
A typical use case is restoring the parameters after the exchange of the IO-Link master.
NOTE
Availability
Note that the Master Backup function is only available for IO-Link devices that are specified
for the IO-Link standard as of V1.1.
More information on the use of the function blocks for the master backup and master restore
is available in the chapter Acyclic data exchange with the IO-Link library (Page 76).
More information on Master Backup and Master Restore is available in the Master Backup
section of the Integration in the Automation System chapter of the IO-Link System
(https://support.industry.siemens.com/cs/ww/en/view/65949252) function manual.
Identification and maintenance data
The identification and maintenance data (I&M data) is information that is saved as read-only
(I data) or read/write (M data) on the module.
Identification data (I&M0): Manufacturer information on the module to which you only
have read access and some of which may be printed on the module housing, for example,
article number and serial number.
Maintenance data (I&M1, 2, 3): Plant dependent information, such as installation location.
The identification data I&M support you in the following tasks:
• Checking the plant configuration
• Locating hardware modifications in a plant
• Correcting errors in a plant
Modules are uniquely identifiable online with the I&M identification data.
In addition, you can read the identification data contained in the IO-Link device as I&M0 via
the associated submodule.
Port Qualifier Information (PQI)
Each port has a PortQualifierInformation (PQI). This PQI provides information on the port and
IO-Link device status. The PQI is transferred cyclically with the process data. The PQI cannot
be deactivated.
The structure of the PQI byte is available in the appendix I/O address space (Page 251).
ET 200eco PN
Operating Instructions, 06/2022, A5E01250250-AN
11.2 IO-Link Master (6ES7148-6JD00-0AB0)
IO-Link Master
217