ALB, ALBI – Alarms for Boolean value

Block SymbolsLicensing group: STANDARD

Function Description
The blocks ALB and ALBI generate alarms or events upon changes in the logical input signal U. The output iac indicates the current alarm (event) code. The parameter (or input) men selects whether to indicate a rising edge (off$\to$on), which corresponds to an upper alarm (HA), a falling edge (on$\to$off), which corresponds to a lower alarm (LA), or both edges of the input signal.

The ALBI block is an extension of the ALB block. The blocks differ only in that the inputs of the ALBI block: men, tout, iACK are parameters of the ALB block. The ALB does have HA, LA and NACK outputs.

Events and alarms are distinguished in the REXYGEN system using the lvl parameter. The list of archives for writing is specified by the arc parameter in the form e.g. 1,3..5,8. Each archiving block must have a unique event identification code in the archive given by the id parameter. For more information about these parameters see the introduction of Chapter 10. Positive values of the iac output codes can be added, e.g. the value 514 means that the upper alarm is unacknowledged. However, not all combinations make sense.

Note 1: The input (parameter) iACK is automatically reset to 0 after processing by the block. The alarm is assumed to be acknowledged by the operator from the visualization so that it is not necessary to write 0 with another query. It is a similar principle to the BSTATE parameter in the MP block.

Note 2: Formatting commands (values attached to the alarm, multilingual text) can be inserted into the Desc parameter. Their detailed description is in the ALARMS block.

This block does not propagate the signal quality. More information can be found in the 1.4 section.

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