Siemens 7LF4 4210 Safety Notes page 3

Contrast adjustment
Data key
1
7
Load the programs of the time switch on to a data key (WRITE KEY)
Warning! all programs already existing on the data key will be overwritten.
1
7
Load the programs from the data key to the time switch (READ KEY)
Warning! all programs already programmed in the time switch will be overwritten.
Hour counter
Displays the total relay ON time, from 0 to 65535 h, and the date of the last reset.
Random function
Function active: the programmed switching cycles are shifted at random within the range of ± 30 minutes.
1
7
or
1
7
or
3/4