Analog Inputs - Grundfos Control DDD Montage- Und Betriebsanleitung

8.7.56 Limit 1 exceeded (4.4.5 - 4.4.6)
Fig. 110 Limit 1 exceeded
Description
With this function, CU 354 can monitor set limits of analog values.
It will react if the values exceed the limits. Each limit can be set
as a maximum or minimum value. For each of the monitored
values, a warning limit and an alarm limit must be defined.
If the value exceeds the warning limit, a warning is given. If the
value exceeds the alarm limit, the pumps will be stopped.
You can set a delay between the detection of an exceeded limit
and the activation of a warning or an alarm. You can also set a
delay for resetting a warning or an alarm.
A warning can be reset automatically or manually.
You can set whether the system is to restart automatically after an
alarm, or if the alarm must be reset manually. Restarting can be
delayed by an adjustable time. You can also set a startup delay
ensuring that the system reaches a steady state before the
function becomes active.
Setting range
• selection of analog input for the function
• input value to be monitored
• limit type (min. or max.)
• warning limit
• alarm limit.
Setting via the operating panel
Analog inputs must be correctly set before the
function is enabled. See section
(4.3.8).
• Settings > Monitoring functions > Limit 1 exceeded / Limit 2
exceeded > Go to setting of analog input.
1. Select analog input.
2. Select: Input value to be monitored. Display 4.3.8.1.1
appears.
3. Select input.
4. Press [Back].
5. Set the minimum and maximum sensor value.
6. Press [Back] x 2.
7. Select: Input value to be monitored.
8. Select input.
9. Press [Back].
10. Select:
• Min. limit / Max. limit.
• Set delays.
11. Press [Back].
12. Select:
• Set warning limit
• Enabled.
13. Set limit.
14. Select resetting: Auto or Manual.
15. Press [Back].
16. Select:
• Set alarm limit
• Enabled.
17. Set limit.
18. Select resetting: Auto or Manual.
19. Press [Back].
20. Select: Enabled.
Factory setting
The function is disabled.

8.7.28 Analog inputs

55