Grundfos Control MPC Montage- Und Betriebsanleitung Seite 68

8.6.64 Limit 1 exceeded (4.4.5 - 4.4.6)
Limit 1 exceeded
Description
With the function, CU 352 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.
The function allows you to monitor two different locations in a
pump system at the same time, for instance the pressure at a
consumer and the pump's outlet pressure. This ensures that the
outlet pressure does not reach a critical value.
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.
If the Limit type is set to Max. limit, an alarm can be set to be
reset automatically or manually. If the Limit type is set to Min. limit,
an alarm can be set to be reset manually only.
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. limit and Max. limit)
• Warning limit
• Alarm limit.
Setting via the operating panel
Analog inputs must be correctly set before the function is
enabled. See section Analog inputs (4.3.8).
• Settings > Monitoring functions > Limit 1 exceeded / Limit 2
exceeded > Go to setting of analog input.
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1. Select analog input.
2. Select: Input value to be monitored. Display 4.3.8.1.1
appears.
3. Select input.
4. Press .
5. Set the minimum and maximum sensor value.
6. Press × 2.
7. Select: Input value to be monitored.
8. Select input.
9. Press .
10. Select:
• Min. limit or Max. limit.
• Set delays.
11. Press .
12. Select:
• Set warning limit
• Enabled.
13. Set limit.
14. Select resetting: Manual or Auto.
15. Press .
16. Select:
• Set alarm limit
• Enabled.
17. Set limit.
18. Select resetting: Manual or Auto.
19. Press .
20. Select: Enabled.
Factory settings
The function is disabled.
Related information
8.6.30 Analog inputs (4.3.8)