ABB Nitrate 8236, Инструкция по эксплуатации, Страница: 22 / 48

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…6 PROGRAMMING
6.2.6 Set Up Alarms Page
Alarm l.e.d. indication and relay output can be assigned either to the nitrate concentration or switched off.
Enter
Yes
No
High
Low
SET UP ALARMS
A1 Failsafe
A1 Enabled
A1 Action
A1 Hysteresis
–
%
Yes
No
A1 Delay – –
m
(a)
(b)
Yes
No
or
or
Enter
or
Enter
Enter
or
or
Enter
Page header.
Advance to next parameter.
Alarm A1 Enable
Select ‘YES’ to enable or ‘NO’ to disable.
Store.
Advance to next parameter.
Alarm A1 Action
Select the alarm action required, ‘High’ or ‘Low’ – see Table 6.1.
Store.
Advance to next parameter.
Alarm A1 Failsafe
If fail-safe action is required select ‘Yes’, otherwise select ‘No’ – see Table 6.1.
Store.
Advance to next parameter.
Alarm A1 Hysteresis
A differential set point can be set as a percentage of the set point value. The differential
setting operates about the set point.
Example – A 5% differential setting operates 2.5% above and below the setpoint.
Select the differential required, between 0 and 5% in 1 % increments.
Store.
Advance to next parameter.
Alarm A1 Delay
If required, relay actuation and alarm l.e.d. indication can be delayed in the event of an
alarm condition. If the alarm condition clears within the programmed delay time, the
alarm function is not activated and the delay time is reset.
Set the required delay time between 0 and 60 minutes in 1 minute increments.
Store.
Advance to next parameter.
Continued on next page.