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| Input Processing Program |
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* Input Processing Program processes data read by communication program at least once
every second.
* The program can perform engineering units conversion upon signal reception for all
analog received.
* The program performs signal validity check (Valid / Invalid) and signal correction
(reference temperature / drift limit).
* The program checks the alarm condition for all inputs based on its predefined setpoints. |
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| Output Processing Program |
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* Output Processing Program processes the selected analog and digital output points.
(The output points can be added, changed, or removed by engineering tools).
* The program writes the output points to an output buffer and the Server-to-DAS
(Data Acquisition System) communication program transfer the output data to DAS. |
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| Real-Time Scheduler Program |
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| * Real-Time Scheduler controls the scheduling of the main programs in the plant
computer system. |
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| Communication Processing program |
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* Internal Interface Communication based on TCP/IP and/or UDP/IP
* External Interface Communication based on TCP/IP and/or UDP/IP |
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| Time Synchronization Program |
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* All computer systems involved in the complete Plant Computer System are time
synchronized.
* The computer servers are time synchronized by DAS System.
* All display stations are time synchronized by computer servers. |
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