CARLO GAVAZZI LDI 35 - CONFIGURATION SOFTWARE Instrukcja Użytkownika Pobierz pdf (Strona 21)

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set alarm value, but also with regards to the alarm type: the hysteresis

value is summed to the set value if the

alarm type is “do” and subtracted

from the set value if the alarm type is “uP”.

Example:

“do” alarm, “SEt”=220 (value of the ON alarm status), hysteresis

“HYS”=12⇒ resulting OFF value (end of alarm status): 232 (resulting

from 220 +12).

“uP” alarm, “SEt”=220 (value of the ON alarm status), hysteresis

“HYS”=12 ⇒ resulting OFF value (end of alarm status): 208 (resulting

from 220 - 12).

NOTE: the hysteresis is to be programmed according to the displayed

range.

oF.d : programming of the value, expressed in seconds, of the time

delay at the alarm set-point’s deactivation (OFF).

Value to be programmed within the range:0 ≤ oF.d ≤ 255.

This delay can be useful when it is necessary to guarantee the alarm

output activation for a sufficiently long time which is to be acquired by the

processing system connected downstream LDI35.

on.d : programming of the value, expressed in seconds, of the time

delay at the alarm set-point’s activation (ON). This value is to be

programmed within the range: 0 ≤ on.d ≤ 255. This value can be useful

when it is necessary to avoid the alarm set-point’s activation if the alarm

duration is not long enough. Example: when the pressure of a liquid to

be measured decreases very quickly because of air bubbles, but this is

not a danger for the monitored plant.

rLY : selection of the normal status of the relay coil.

nd : normally de-energized coil.

Gross Automation (877) 268-3700 · www.carlogavazzisales.com · [email protected]

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CARLO GAVAZZI LDI 35 - CONFIGURATION SOFTWARE Instrukcja Użytkownika Strona 21