User Manual

Table Of Contents
Alarm management
Alarm response of the function blocks
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An OFFNORMAL alarm occurs when the current values of the variables [RwVal] and [FbVal] differ from
each other for a time period at least equivalent to the delay time specified in [TiMonDvn].
An existing OFFNORMAL alarm will disappear when the current [PrVal] und [FbVal] are again identical
and remain so for a period at least equivalent to the time specified in the variable [TiMonDvn].
A FAULT alarm is generated when the [Rlb] property of the function block assumes any value other
than NO_FAULT_DETECTED. In particular, this is the case when the [Rlb] property changes from a
value not equal to NO_FAULT_DETECTED to another value not equal to NO_FAULT_DETECTED. In the
case of the multistate output block, [Rlb] errors may originate both from the [PrVal] (or associated
physical output) and from [FbVal] (or associated physical input).
A FAULT alarm will disappear as soon as [Rlb] changes from a value not equal to
NO_FAULT_DETECTED back to the value NO_FAULT_DETECTED.
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
Alarm response
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]