The SIMATIC S7-1500 R/H is a redundant, high-availability CPU designed to maximize plant availability. By synchronizing a backup CPU with the primary one, it ensures no data is lost during an outage, preventing costly production standstills. Its unique value lies in its system-integrated synchronization and project consistency, requiring no special knowledge for engineering in the TIA Portal.
Redundant systems are easier to maintain than application-based solutions and can prevent outages in many cases, reducing maintenance and production costs.
By linking redundant CPU pairs together via PROFINET, redundant systems enable “hot standby” to ensure that the plant can continue to run during an outage or other unforeseen events.
When a redundant CPU is being replaced, the plant continues to operate because the backup CPU has already taken over as the primary CPU.
High-availability CPU pairs are connected with synchronization modules and fiber-optic cable. The IO periphery is connected to the primary and backup CPU as R1, a switched S1 or S2 device via a PROFINET line or ring with MRP.
The backup CPU is automatically fed the same program by the system and synchronously monitors the primary CPU in operation. Up-to-date data is available in the primary and backup CPUs at all times so that the backup can take over.
Engineering and visualization take place in TIA Portal, including simulation of the CPU using PLCSIM Advanced. Program a redundant CPU, with or without safety-related functions, the same way as other SIMATIC controllers.