HIMA HIMax X-MIO 6 01, Руководство пользователя

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4 Start-up X-MIO 7/6 01
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4.4.1 2oo3 Evaluation
For the 2oo3 evaluation, at least two of the three input signals must be sampled without errors.
The following actions are performed if one of the input signals cannot be sampled without
errors:
 The
Warning Existing
parameter is set to TRUE
 The warning relay is de-energized.
 A diagnostic entry is written.
The sampled rotation speed values are compared to one another. The action previously
described occur if one of the values diverges from the other two values beyond the safety-
related accuracy limits. If more than one value is outside these limits, the trip function is
triggered.
For the digital inputs DI 02...DI 04, at least two of the three input signals must be sampled
without errors or the trip function is triggered.
4.4.2 Threshold Monitoring
The module is equipped with a gradient monitoring function. It monitors the rotation speed for
violation of the configurable thresholds
Upper Limit [mHz]
and
Lower Limit [mHz],
which define
the turbine's rotation speed range.
Using the
Activation Threshold [mHz]
parameter, lower limit monitoring is only activated when
the rotation speed overruns the activation threshold. Afterwards, if the rotation speed underruns
the activation threshold, the lower limit monitoring function remains active.
The following conditions must apply for the activation threshold:
Activation threshold
≥ lower limit and activation threshold ≤ upper limit.
The trip function is performed if the configured threshold is overrun.
4.4.3 Gradient Monitoring
The module is equipped with an optional gradient monitoring function. The parameters for
gradient monitoring,
Max. Increase, Positive
and
Max. Increase, Negative
, are set to the
maximum values allowed and therefore not active. For gradient monitoring, the allowable
thresholds for the turbines must be used.
The measuring facility evaluates the acceleration values. The 2oo3 evaluation within the
safety-related processor system forms the arithmetic mean of the acceleration values. The
determined acceleration value is output as
Gradient Raw
.
If the gradient raw value overruns the value of
Max. Increase, Positive
or
Max. Increase,
Negative,
the trip function is performed.