Hello,

Thank you for the information.

i would like to ask, in case to migrate to TIA without changing the Redundant S7315-2DP CPU, did the Software redundancy will work fine on this CPU using TIA ?

I mean, if the customer want just to upgrade the Software from simatic to TIA Portal, is is ptossible to keep the s7315-2DP redundant CPU and just upgrade the Soft to TIA , did the redundancy will still work fine ?

thank you

SIMATIC International Technical Support Hub

Hello SIOS forum community,

Software Redundancy was an inexpensive product for simple redundancy applications.

However, the basis was the S7-300/400 and STEP 7 V5.x.

The successor in the TIA Portal environment is the S7-1500R. Here we briefly show what should be considered when changing over:

Software redundancy was a warm standby solution with switching times between approx. one and several seconds (depending on the quantity structure and the CPU-CPU coupling). Since the S7-1500R is a hot standby system and the switchover times are typically around 300ms, the application area can be extended accordingly.

For software redundancy, the periphery was connected via Profibus DP. An S7-1500R couples the periphery via Profinet IO.

An S7-1500R synchronisation coupling works exclusively via Ethernet.

The project must be migrated from STEP 7 V5.x to TIA Portal.

The restrictions on address assignment no longer apply in the S7-1500R system.

The HMI systems can now be connected simply via the system IP address and there is no longer any need for complex project planning for switching the connection.

However, it should be noted that the S7-1500R does not support all system functions that a standard S7-1500 contains. Therefore, you should check in advance whether the desired functions are included. For example, web servers, OPC UA etc. are not supported. (see manual S7-1500R)

SIMATIC International Technical Support Hub

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