FC-QPP-0002 V2.0 | Honeywell Quad Processor

The QPP reads the process inputs and executes the application program created with the Application Editor. The results of the control program are transmitted to the output interfaces. In Safety Manager configurations with a redundant Controller, both QPPs synchronize their operation through a dedicated redundant communication channel, integrated in the Controller backplane. Through continuous testing of Safety Manager hardware and software integrity, the QPP ensures safe operation as well as extensive diagnostics.The QPP contains a watchdog circuit. It automatically monitors the correct functioning and the operating conditions of the QPP safety processors. The watchdog circuits include the following functions:• The monitored operating conditions include the data integrity check of theprocessor memory and the voltage range check of the supply power (undervoltage and over voltage).• Deactivate the safety-critical outputs of Safety Manager, regardless of theQPP status, whenever required.The QPP is also equipped with the following items:• 4 bus drivers to drive the IO chassis• A status LED• Display to show time, date, system information, system status anddiagnostics• Key switch