New functions with firmware V3.1 for S7-1500 R/H CPUs:

See product announcement: New firmware version V3.1 for SIMATIC S7-1500 R/H CPUs

Enhanced user experience:

The following behavior has been improved:

• The <TO>.FollowingError.AdditionalSetpointDelayTime tag acts on the calculation of the following error (<TO>. StatusPositioning.FollowingError), as well as the corresponding error reactions
• Improved stability of R/H CPUs when transitioning from SYNCUP operating state to RUN-Redundant (compensating backup CPU) and simultaneous primary controller failure/stop

The following behavior was corrected:

• R/H systems: When acknowledging alarms after the primary backup switch has been completed, the system remains in the RUN-Redundant state
• The Observe in STL module of "L STW" instructions no longer results in the sporadic error message:
  • Temporary CPU error: Serious firmware exception error (internal system code: 16#00400001 16#1002004B 16#00000000) CPU changes to DEFECTIVE mode (system reaction)
• Calling an OPC UA method which is currently not executable and contains structured data, no longer results in the sporadic error message:
  • Temporary CPU error: Serious firmware exception error (internal system code: 16#0FFF0000 16#10020000 16#00000000) CPU changes to DEFECTIVE mode (system reaction)
• Using SFC "WWW" to synchronize user-defined web pages with the user program in the CPU no longer results in this sporadic error message when writing variables via the user program (UP) command on an otherwise empty web page:
  • Temporary CPU error: Serious firmware exception error (internal system code: 16#0FFF0000 16#10020000 16#000000000) CPU changes to DEFECTIVE mode (system reaction)
• When an NTP server returns and a syslog server is unreachable at the same time, this no longer results in this highly sporadic error message:
  • Temporary CPU error: Serious firmware exception error (internal system code: 16#00100001 16#1002FFFF 16#00000000) CPU changes to DEFECTIVE mode (system reaction)