Lambrecht Ser[LOG], Руководство оператора

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LAMBRECHT meteo GmbH Ser[LOG] Manual Page 84 of 129
7.4 Area monitoring
The range monitoring is used to monitor limit values (MIN/MAX) while simultaneously taking into ac-
count the data from up to three different sensors. By means of additional selection boxes "ON within"
and "ON outside", it can be determined in which range the switching function is to take place. In the
basic state (set condition not fulfilled) the respective relay is on contact "S0" (OFF). As soon as the
Ser[LOG] is switched on, the relays are initialized and the Ser[LOG] switches the relays according to
the set logic.
Note: Area monitoring cannot be combined with cycle control! Area monitoring can be combined with
process control and error monitoring.
7.4.1 Simple area monitoring (OR operation)
Up to 3 sensors can be selected for range monitoring per switching output.
If different sensors (1 to max. 3) are selected for range checking, the sensor data is linked via a logical
"OR operation", i. e. a switching process takes place when a limit value condition is reached.
The area monitoring is activated via the checkbox "Area monitoring active". The time in hours (HH),
minutes (MM) and seconds (SS) for which the event (area violation) must be present is set in the fields
next to the "On delay" before the respective switching channel is set to 1 (ON).
Correspondingly, in the fields next to the "Off-delay end", the time in hours (HH), minutes (MM) and
seconds (SS) for which the event (range violation) is no longer present is set before the respective
switching channel is reset to 0 (OFF) again.
In the "Measurement channel" selection box, the sensor value (measurement channel) to be moni-
tored is selected.
The limit values for range monitoring are entered in the "Minimum" and "Maximum" fields below them.
Note: The minimum numerical value must always be smaller than the maximum numerical value!
The switching logic can be set via the checkboxes "ON within" and "ON outside".
Either the checkbox "ON within" can be activated and thus a warning can be issued as soon as the
measured value is found within the range configured with "Minimum" and "Maximum" or the checkbox
"ON outside", whereby a warning occurs as soon as the measured value is outside the configured
range.
Example - simple area monitoring
The relay signals that the temperature limit value (S 03) has
been exceeded when the set maximum limit value is ex-
ceeded: 25 °C
OR
of global radiation (S 06) when the set maximum limit value is
exceeded: 700 W/m².
with a switch-on delay of 30 seconds or a switch-off delay of
one minute.