CPU 1214 firmware features and improvements
Improvements
The S7-1200 CPU firmware update V4.5.1 replaces the V4.5.0 and corrects the following issues:
- Retentive memory is retained after a firmware upgrade from V4.x to V4.5.1
- The SET_TIMEZONE instruction can be executed any number of times
- You no longer need to power cycle after a firmware update to V4.3.x or an older version