Lenze c300 - Manual (Page 71)

9 Data integrity in the event of a voltage failure
9.3 Storage of retain/persistent variables of the PLC
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Lenze · Controller | Parameter setting & programming · Reference Manual · DMS 1.5 EN · 04/2014 · TD17
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9.3 Storage of retain/persistent variables of the PLC
For the storage of retain/persistent variables, a defined storage capacity is available:

Tip!
You can create retain variables in the »PLC Designer« by marking the variables with the
keyword RETAIN.
Further information on how to create retain variables in the »PLC Designer« can be found here:
 Creating remanent variables (retain/persistent) ( 64)
Controller Storage capacity
3221 C
3231 C
60 kB
3241 C 1 MB (with external battery pack/capacitor pack)
c300 128 kB
p300 128 kB
p500 1 MB