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or by eliminating short pulses. The filter time constant should be customized to the
maximum speed of changes in the measured process.
[5]: It enables enabling or disabling the archiving of the results of the measurement of a
particular channel. Selecting the screen is equivalent to switching on the archiving.
[6]: The emergency value is the value which is displayed instead of the measurement
result if the sensor is damaged. It is possible to programme the emergency value by
entering it into the suitable window appearing next to the list, after the option has been
enabled.
[7]: This option will enable determination of the scope of the scale displayed on the trend
line graph, by inserting the numeric values in the suitably described minimum and
maximum fields.
14.3.3 Alarm
Mode: Disabled (Disabled, Low, High)
Type: Alarm (Control, Alarm)
Level: [None] (text)
Hysteresis: [None] (text)
Colour: None (None, Red, Green, Yellow)
Output:-- (--, A, B, C, D, E, F, G)
Log event: Disabled (Disabled, Enabled)
Change the frequency of archiving: Disabled (Disabled, Enabled)
[1]: The threshold can be set to High (active above a specific level) or Low (active below a
specific level) operation mode.
[2]: Setting of the alarm for a particular channel results in the measurement value being
exceeded by the user alarm. Control setting to either of the listed output relays
activates the selected relay if any alarm/control threshold is exceeded. Select
appropriate threshold and hysteresis values to support simple binary on/ off control
operations. For example, when a fan is connected to a correctly preset output relay
and when the High threshold is set to 50 °C with 8 °C hysteresis, the fan will be
switched on and off when the temperature level is above 50 °C or below 42 °C,
respectively.
[3]: The threshold level value is entered in the measured value units assigned to a specific
measurement channel.
[4]: The hysteresis value is the difference between the threshold value exceedance and
return to normal. The threshold hysteresis value is entered in the measured value units
assigned to a specific measurement channel. For example, for a threshold set to High,
58 °C threshold level and 0.5 °C hysteresis means that the threshold will be exceeded
above 58 °C, and will return to normal below 57.5 °C (58-0.5). For a threshold set to
Low, -15 °C threshold level and 0.2°C hysteresis means the threshold will be
exceeded below -15 °C, and will return to normal above -14.8 °C ( -(15-0.2)).
[5]: Each alarm/control threshold can have a colour assigned. If the threshold is exceeded,
the result is displayed in a different colour.
[6]: The drop down list allows to select a suitable module and output to which the used
output relay is connected.
[2]
[3]
[4]
[6]
[1]
[5]
[ [7]
57
DL7, DL7L
[8]
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