The default setting of the switch is "Rack 0". Change it so it says "Rack 1" instead of "Rack 0". If you have no idea what I'm talking about, good news, this might be it! Take the second PLC off Rack 1 and look for an exposed switch on the back. Check the following before pulling out your soldering iron and green LEDs.
And it is compliant with the latest safety standards from the IEC and NFPA.Your code compiles, hardware config is all set, but you can't get rid of the red lights on the 400H system. This is ideal for applications which require enhanced safety for humans, machines, and environment. This gives you a controller with the highest level of availability, automatic switchover with no data loss, which is self-monitoring to force the system to a safe state in the event a fault occurs.
and the backup controller is updated automatically!The SIMATIC S7-400H is also available in a redundant AND failsafe version, the SIMATIC S7-400FH.
Of course, you have the full capability to make online modifications such as program changes and module replacement without disrupting your process or machine. Additionally, the controller's operating system manages the fault-tolerant communication externally to HMIs and Supervisory Systems. A patented event synchronization algorithm built into the controller's operating system guarantees that the primary and backup controllers stay coordinated. With switchover times of less than 100ms, your process or machine won't skip a beat.Without any programming effort on your part, there is complete bumpless switchover to the backup system with no loss of data. Siemens SIMATIC S7-400H is the fault-tolerant controller designed for time-critical processes that must keep running.
Some production machines and processes simply must remain running. Tie your entire automation solution together with one Totally Integrated Automation system Keep Production-Critical Machines and Processes Running With Hardware RedundancySiemens SIMATIC S7-400H Whether unscheduled downtime results in lost production, scrapped product, or expensive restart efforts, your business just can't afford to stop.Troubleshoot with ease through powerful integrated system diagnostic functions.Continue processes and do expansions during operation with "Configuration in RUN" and hot-swapping of modules.Make information more widely available through open communication standards.Lower cost of projects with more functionality packed into the platform.Learn and maintain only standard programming languages (IEC 61131-3).Save time and engineering costs with program portability across the entire SIMATIC family.Quick startup and more flexible production facilitated by a universal engineering environment.Just a few ways that SIMATIC S7-400 can meet your needs: Flexible architectures can be implemented from traditional control to central coordination of distributed slave controllers in a plant-wide architecture. You can implement fast and complex applications using the S7-400's enhanced processing and communication capabilities. Power Controller for System Solutions in Production and Process Applications Siemens SIMATIC S7-400The SIMATIC® S7-400 controller provides the highest performance in the SIMATIC S7 family, offering Totally Integrated Automation® for production and process engineering. Siemens SIMATIC S7-400 Power Controller for System Solutions in Production and Process Applications