ABB Freelance 2000, Руководство пользователя

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Section E Logs
E-5
E 1 General Description - Logs
Logs are used for logging information and messages from the process and from the Freelance
2000 system. Logs are output on a printer or screen. A distinction is made between two different
types of log - event logs and state logs.
E 1.1 Event logs
Event logs are used for logging events such as messages , faults , switching activities and
operator interventions (incl. user names, if DigiLock installed). Logging is effected spon-
taneously when an event occurs.
The signal sequence log is used for acquisition of events and is therefore classified with the
event logs. A further distinction is made between signal sequence log 1 and signal sequence
log N . Data of signal sequence log 1 are output continuously on a printer. By contrast, data of the
signal sequence log N are output only on completion of logging or per manual intervention.
Various different types of messages can be logged: process messages and system messages
are generally used to indicate events and faults, while a sequence of event log can be used to log
switching events in the field with a resolution of 2 ms.
E 1.2 State logs
State logs are used for cyclic logging of process states . These include the cyclic acquisition of
the state of a tag or the logging of sequences within the process.
The disturbance course log and operation log are classified as state logs. The disturbance
course log uses a special disturbance course log acquisition module from the process station.
The module acquisitions cyclically the input signals and saves them in a ring buffer of
max. 200
values per input signal.
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