Teracom TCW220, Руководство пользователя

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TCW220_R4.15 – November 2022 Page 17
7.2.3.2. Digital inputs
For every digital input, a description up to 15 characters can be set.
The text, written in “Low level” and “High level” is displayed on monitoring page for this input.
These fields accept up to 15 characters.
7.2.3.3. Analog inputs
For every analog input, a description up to 15 characters can be set.
For every analog input fields “Unit”, “Multiplier” and “Offset” are available. They can be used
to convert the raw voltage input to meaningful engineering units if required. The shown value
is calculated by:
DV[Un] = (AV – OF) * MU
Where:
DV – displayed value;
Un – unit;
AV – real analog voltage from source;
MU – multiplier in dimension [parameter/Volt];
OF – offset.
Example:
For humidity sensor HIH-4000-003 following parameter (coming from data sheet) should be set
for fine work:
Unit - %RH
Offset - 0.826
Multiplier - 31.74, the value is inverted of slope parameter (1/0.0315);
If the output voltage of this sensor is 3.198V on the monitoring page will be shown 75.28% RH:
75.28 = (3.198 – 0.826) * 31.74
By default
and after “Factory default settings” procedure:
Unit - V
Offset - 0.00
Multiplier - 1.00
7.2.3.4. Virtual inputs
Virtual item is an additional feature that gives the ability to clone a monitored parameter -
analog input or 1-Wire sensor.
For the virtual item, different alarm borders from the original can be set. In this way, more
alarm borders (alarm notifications) can be organized for the same parameter.