Hour Counter; Random Function - Siemens 7LF4 531-0 Operating Instructions Manual

Data key
Load the programs of the time switch on to a data key (WRITE KEY)
Warning! all programs stored on the data key will be overwritten.
0 6 12 16 24
Load the programs from the data key to the time switch (READ KEY)
Warning! all programs stored in the time switch will be overwritten.

Hour counter

Displays the total relay ON time (0 to 65535 h) and the date of the last reset.

Random function

20
2514264123-02
3ZW1012-7LF45-3AA0
or
0 6 12 16 24
or