Backing up data and series commissioning
7.5 Write and know-how protection
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
371
Exceptions to write protection
Some functions are excluded from write protection, e.g.:
● Activating/deactivating write protection
● Changing the access level (p0003)
● Saving parameters (p0971)
● Safely removing the memory card (p9400)
● Restoring the factory setting
● Importing settings from an external data backup, e.g. upload from a memory card to the
converter.
The individual parameters that are excluded from the write protection, can be found in the
List Manual in Chapter "Parameters for write protection and protection of know-how".
Note
Write protection for multimaster fieldbus systems
When using multimaster fieldbus systems (e.g. CAN Bus, BACnet), parameters can be
changed in spite of an active write protection. So that write protection is also active when
accessin
g via these fieldbuses, you must additionally set p7762 to 1.
In STARTER, this setting is only possible via the expert list.
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