For steady operations, high reliability is an essential requirement of controllers which perform control and data acquisition for various equipment and processes and interlink with other controllers in the control domain. FCN and FCJ autonomous controllers sport highly reliable software and hardware architectures such as rugged hardware and dual-redundant configurations (optional) for mission-critical equipment.

With compact hardware, the FCN and FCJ can be installed in distributed locations nearby or inside individual pieces of equipment and machines.

All actions and management for control, including sequence and loop control, alarm monitoring, and parameter management, are performed by each of the FCN and FCJ controllers. Even if the SCADA software used for the controllers fails, it does not affect the sites. Parameters and alarm statuses are collectively managed for each controller, hence the same information is given to users even when multiple HMIs are used.

The FCN and FCJ possess the ruggedness required for the heart of a system, such as memory with ECC, RAS features (CPU self-diagnostics, temperature monitoring, I/O module fault diagnosis), and hot-swappable I/O modules.

For the FCN, all key parts such as the power, CPU and the control LAN and internal bus connecting I/O expansion units can be duplexed. And also,FF-H1 modules can be duplexed. For the FCJ, the control LAN can be duplexed.