PPA322B HIEE300016R2 HIEE400235R1 ABB DCS / PLC system module

PPA322B HIEE300016R2 HIEE400235R1 ABB DCS / PLC system module

PPA322B HIEE300016R2 HIEE400235R1 ABB DCS / PLC system module

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according to IEC61508, certified by TüV. The SM810 is running a SIL3 certified

operating system and have a high degree of self-diagnostic including, for example:

? Double and inverted memory

? Double over voltage protection on internal voltages

? Two independent watchdog timers

? Oscillator supervision

? CRC on firmware and data storage

An SM811 or SM812 operates like an SM810 for SIL2 but can also together with

the PM865 or PM867 form a controller compliant with SIL3 according to

IEC61508, certified by TüV.

The ModuleBus telegrams used in a High Integrity system with the S800 High

Integrity modules use the concept of long frames. Long frames are ModuleBus

telegrams that are extended with a safety header, comprising additional diagnostics

data and CRC32. S800 ModuleBus telegrams sent to the S800 I/O High Integrity

modules uses data from the PM865/PM867 and an inverted CRC32 from the

SM810/SM811/SM812. The I/O module checks that the safety header is correct.

Data received from the S800 I/O High Integrity modules over the ModuleBus have

the safety header independently verified by both SM810/SM811 and PM865 or

SM812 with PM867. Any CRC32 or other faults in the safety header will result in a

retry transmission and, if repeated, a shutdown of the faulty S800 I/O High Integrity

module.