GIC 151A12B, Instructions Manual

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4.Deviation low ( “dELo” on display):
Alarm is activated if PV goes below (Effective Set Point - A1th) and is deactivated when
it goes above (Effective Set Point–A1th + A1hy).
5.Deviation high(“dEhi” on display):
Alarm is activated when PV goes above Effective Set Point +A1th) and is
deactivated When it goes below (Effective Set Point + A1th-A1hy).
6.Deviation band (“dEbA” on display):
Alarm is activated when PV goes above (Effective Set Point + A1hi) or below
(Effective Set Point - A1Lo) and is deactivated when PV goes below (Effective Set Point
A1hi - A1hy) or above (Effective Set Point - A1Lo + A1hy).
7.Output low(“oPLo” on display):
Alarm is activated if output goes below o1LV and deactivated when output goes above
(o1LV+o1hs).
8.Output high(“oPhi” on display):
Alarm is activated if output goes above o1hv and deactivated when output goes below
(o1hv-o1hs).
16.2 Alarm Functions:
1. Acknowledged: -
a.+0 = Alarm not acknowledged. Alarm remains active in alarm conditions only.
b. +1 = Alarm acknowledgement active – the alarm remains active in alarm conditions
and deactivated when alarm conditions does not exist. But while alarm condition still
exists, if properly programmed 'C' key is pressed, then the alarm is deactivated.
2. Delayed: -
a.+0 = Alarm is activated immediately on alarm condition occurrence.
b. +2 =Alarm is activated after the delay set on par. A1dL.But, if alarm condition
disappears while the controller is still executing the delay, then the alarm willnot be
activated. Once activated, the alarm alarm will be deactivated only after controller sees
non-alarm condition. There will be delay executed while deactivating the alarm.
3. Latched:-
A.+0 = Alarm not latched – alarm remains active in alarm conditions only.
4. No alarm at power on:
a.+0 = Alarm is activated when there are alarm conditions.
b. +8 = if the instrument is in alarm conditions when switched on, then alarm is not
Activated. It will be activated once Instrument goes in non- alarm condition and back to
alarm condition.
5. No alarm at sP change: -
a.+0 = alarm is activated when there are alarm condtions
b. +16 = If the instrument goes in alarm conditions after changing the set point, the
alarm will not be activate. It will be activated, once instrument goes in non-alarm
condition and back to alarm Condition.
Note:
Alarm types and functions are explained for Alarm 1.The explanation is same for Alarm
2.Binary addition of alarm function allows combination of different function.
E.g.
If it is required to have no alarm at power On [8] and no alarm at SP change [16], set
function as 24.