Marcjan

Hello,

Be carefull with the frequency off writing data, to high will result in a defective EEprom.

Tip

Since the number of save operations to the permanent memory (EEPROM) is limited (100,000

minimum, and 1,000,000 typical), you should ensure that only necessary values are saved.

Otherwise, the EEPROM can wear out and the CPU can fail. Typically, you should perform save

operations at the occurrence of specific events that occur rather infrequently.

For example, if the scan time of the S7-200 is 50 ms and a value was saved once per scan, the

EEPROM would last a minimum of 5,000 seconds, which is less than an hour and a half. On the

other hand, if a value were saved once an hour, the EEPROM would last a minimum of 11

years.

Regards,

Marcjan