The TPC system supports redundant PC architecture. In a two-level redundant configuration, two PCs work collaboratively to provide primary and backup support for main process control: one acts as the primary controller, the other as the backup – which also functions as a real-time client station for monitoring and programming during primary PC operation. If a fault occurs on the primary (an extremely rare event), the backup seamlessly takes over control without manual intervention.

All data and configurations are automatically synced to the backup PC during primary operation, ensuring the backup can fully resume all original settings and data logging upon takeover. This mechanism guarantees that backup records of every operation are always stored on the secondary PC, even if the primary never malfunctions. 

PLC Redundancy

For customers requiring higher redundancy levels, SINOMAC offers multiple hardware redundancy options. One solution adopts a PLC architecture with redundant processors and communication links connected to each PLC rack (requires specific PLC hardware and typically increases control system costs). For smaller autoclaves or ovens, a complete backup PLC rack and processor can be configured to switch automatically to the backup system in the event of PLC hardware failure. 

Manual Setpoint Controllers & Chart Recorders

Based on the high reliability of the dual-PC redundant system, SINOMAC generally does not recommend additional independent setpoint controllers and chart recorders. Such devices have limited functionality, require integration with the main PLC, and cannot deliver even the basic advanced control capabilities of the PC system. They also incur extra annual maintenance and calibration costs. We therefore recommend the two-level dual-PC system as the primary redundancy solution, instead of setpoint controller and recorder combinations.