IE-SNC-Tx5xx-03
9
•
two years for T4511
Storing
Store the device in a temperature range of -30 to +80 °C, non condensing humidity 0 to 99 %RH.
Description of device functions
Information provided by the device can be read on its LCD display or by means of the
following protocols. To communicate via SNMP and modbus protocols it is necessary to have
appropriate software installed on the computer. Such software is not included in the delivery.
The following part describes functions and features of the device.
Alarms
It is possible to set an upper limit, lower limit, hysteresis and time delay to each measured
value.
Description of alarm function
Figure 6 shows a temperature curve with some specified upper limit (temp_limit_high) and
hysteresis. At point 1 temperature exceeds the limit. From that moment a time delay is counted
(time_delay) after which an alarm is set. Because at point 2 the temperature dropped below the
limit value (temp_limit_limit) before the time delay expired, alarm was not set.
Figure 6 – temperature curve
At point 3 the temperature again exceeded the limit, and because it did not drop below the
limit value (temp_limit_high) before the time delay ended, the alarm was set at point 4. At this
moment the alarm e-mails and traps are sent, if they are enabled, and the alarm flag is set (the flag is
set when the alarm is active and reset when inactive). The state of the flag can be found on the
www pages or via Modbus or the information console. The alarm lasted to point 5, where the
temperature dropped below the limit value given by the adjusted hysteresis (temp_limit_high–
hysteresis).
For other measured values the principle of alarm activity is analogical.
An alarm report is always sent right after an alarm appears. The device memorizes sent
alarm reports of current alarms while the power is connected. In case of power disconnection or a
