Lenze c300 - Manual (Page 77)

10 Device replacement - replacing the controller (in the event of
service)
77
Lenze · Controller | Parameter setting & programming · Reference Manual · DMS 1.5 EN · 04/2014 · TD17
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10.4 Subsequent use of retain data on the new controller

How to proceed in case of 3221 C/3231 C:
In order to be able to further use the retain data of the Controllers 3221 C/3231 C after a
device replacement, ...
• save the desired data to the SD card from the application;
• restore the desired data from the application.
Further information on the use of retain variables.
 Creating remanent variables (retain/persistent) ( 64)
 Storage of retain data on the SD card (only Controllers 3221 C/3231 C) ( 65)

Note!
Depending on the used controller, the retain data of the PLC may no longer be available
after a voltage failure/device replacement.
• Controllers 3221 C/3231 C save the retain data internally (in the device, not on the SD
card). Hence, the retain data of the replacement device correspond to the output
values (default values).
• The Controllers 3241 C, c300, p300 and p500 save the retain data on the SD card.