User Manual

Alarm management
Alarm response of the function blocks
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Power Control
An OFFNORMAL alarm is generated:
● The UP command is issued but the maximum stage has already been
reached
● The UP command causes MaxPower to be exceeded
● Table_No is set outside the admissible range
A FAULT alarm is generated when:
● A referenced object is not found
● A referenced object is not a multistate value object
● Object_No. is outside the admissible range
● StepLimit is outside the range of the referenced object
● The function table is empty
Pulse Converter
An OFFNORMAL alarm is generated, when [PrVal]:
● [PrVal] has remained above the high alarm limit specified by the [HiLm]
variable for a period of time longer than the period specified in [TiMonDvn]
(HIGH_LIMIT)
● or [PrVal] has remained below the low alarm limit specified by the [LoLm]
variable for a period of time longer than the period specified in [TiMonDvn]
(LOW_LIMIT)
An existing OFFNORMAL (HIGH_LIMIT) alarm will disappear when [PrVal] has
remained below the value ([HiLm] + [Nz]) for longer than the time specified in
the variable [TiMonDvn]
An existing OFFNORMAL (LOW_LIMIT) alarm will disappear when [PrVal] has
remained below the value ([HiLm] + [Nz]) for longer than the time specified in
the variable [TiMonDvn]
● A FAULT alarm is generated as soon as the [Rlb] property of the function
block assumes any value other than NO_FAULT_DETECTED. In particular,
this is the case when [Rlb] changes from a value not equal to
NO_FAULT_DETECTED to another value not equal to
NO_FAULT_DETECTED.
● A FAULT alarm will disappear as soon as the [Rlb] property of the function
block changes from a value not equal to NO_FAULT_DETECTED back to the
value NO_FAULT_DETECTED.
Alarm response