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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.
