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Integration into the automation system
3.4 Replacing a master or device during operation
Note that the behavior of the IO-Link master and the IO-Link devices during device
replacement depends directly on the set data backup level.
You can find additional information on this dependency in the section Replacing a master or
device during operation (Page 28).
NOTE
We strongly recommend resetting an IO-Link device to the factory settings before performing
a restore by the IO-Link master. This prevents a permanently stored backup prompt of the
device from accidentally overwriting the restore parameters.
Triggering a backup
Requirements
• You have set the correct data backup level.
• The IO-Link master and the IO-Link devices you are using support this function (IO-Link
Specification V1.1).
Procedure
There are several ways to trigger a backup:
• In the engineering tool:
After you have downloaded the engineering settings to the device, the IO-Link device
immediately triggers a backup.
• In the CPU user program:
IO-Link device parameters can be changed successively by the user program.
A backup is only triggered by a system command. The system command must be triggered
by the user program after the parameter changes.
You can implement the parameter changes and the system command for triggering the
backup with function blocks of the CPU.
• Using the HMI:
You proceed as with triggering by the user program.
The plant operator then triggers the necessary system command on the HMI device.
• Locally by operating the IO-Link device:
After confirming the input on the IO-Link device, the IO-Link device initiates the backup.
3.4
Replacing a master or device during operation
Replacing a device
Replacing a device during operation is a scenario that occurs again and again and has to be
completed without longer plant downtimes. Replace a device quickly and avoid incorrect
settings. Devices can also be replaced by operators without special knowledge and aids.
28
Function Manual, 07/2022, A5E31637677-AC
IO-Link system
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