System Description IO-Link
Operating modes
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Data storage mode
NOTE
Data storage mode is only available for devices complying with the IO-Link specifica-
tion V1.1.
Data storage mode makes it possible to replace IO-Link devices without the need for a reconfig-
uration.
The IO-Link master or the IO-Link device save the device parameters set in the previous config-
uration. In data storage mode the parameter data memories of IO-Link master and IO-Link
device are synchronized. If data storage mode is activated in the IO-Link master, the master
writes the stored device parameters to the new device after a device is replaced. The applica-
tion can be restarted without having to perform a new configuration.
IO-Link-Master
(IOLM)
IO-Link-Device
(IOLD)
DS_UPLOAD_FLAG
Fig. 3: Data storage mode – general principle, Para. IOLD = parameters of the IO-Link device
4.4.2
Standard I/O mode (SIO mode)
In standard I/O mode IO-Link devices behave like digital sensors or actuators. In this mode the
devices only send input or output data to the higher-level instance. IO-Link access to the device
is not possible.