ABB S800 I/O - Page 107

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LED’s shall be identified by an appropriate symbol or abbreviation of an English
term. For the standard indications the abbreviation is as follows:
• Fault in the module FAULT or F
• Device is in operation RUN or R
• External fault or minor fault in the module WARNING or W
• Output Set as Predetermined, OSP or O
• Digital I/O on-state 1, 2,... (channel number)
• Digital I/O channel FAULT or F
• Power supply ok internal and/or external ok POWER OK or P
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Not applicable.
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Diagnostics are available in different forms for rapid localization of the source of
the equipment malfunction. Hardware error is usually corrected by replacing the
faulty module which is returned to ABB Service for repairs. The smallest
replaceable unit is normally a module or an apparatus like a power supply unit.
Disturbances and system halt caused by software error is commonly solved by a
manual system restart.
External faults in process wiring and transducers can also affect the function of the
S800 I/O system. However, this type of fault is not discussed in this manual.