Level; In-Bounds/ Out-Of-Bounds Range; Example: Setting An In-Bounds Level Alarm - Siemens SITRANS L 7ML5400 Operating Instructions Manual

General Operation
7.6 Alarms
7.6.2

Level

The level alarm is the most common. Use this alarm to warn you when your process is in
danger of being upset due to high or low levels.
High level and low level alarms can be set to activate when the material level rises above or
falls below a set level. (See High Level Alarm (2.8.1.) (Page 200), Low Level Alarms (2.8.2.)
(Page 201).)
Example: Setting a High Level Alarm
To assign Relay 3 to a high level alarm that activates when the level rises above 10 m:
1. Enable the High Level Alarm (set Enable (2.8.1.1) (Page 200) = Enabled)
2. Set High Level Value ON (2.8.1.2) (Page 200) = 10 m
3. Set High Level Value OFF (2.8.1.3) (Page 201) = 9 m
4. Set Assigned Relay (2.8.1.4) (Page 201) to Relay 3.
Use the High Level alarm in conjunction with Time To Spill (2.8.12.) (Page 211) feature.
Example: Setting a Low Level Alarm
To assign Relay 3 to a low level alarm that activates when the level fails below 2 m:
1. Enable the Low Level Alarm (set Enable (2.8.2.1.) (Page 201) = Enabled)
2. Set Low Level Value ON (2.8.2.2.) (Page 201) = 10 m
3. Set Low Level Value OFF (2.8.2.3.) (Page 202) = 9 m
4. Set Assigned Relay (2.8.2.4.) (Page 202) to Relay 3.
7.6.3

In-bounds/ Out-of-bounds Range

Use the bounded range alarms to detect when the level is inside or outside of the range.
7.6.3.1

Example: Setting an In-bounds Level Alarm

To assign Relay 3 to an in-bounds level alarm do the following:
1. Enable the In-bounds Level Alarm (set Enable (2.8.4.1.) (Page 203) = Enabled)
2. Set High Level Value (2.8.4.2.) (Page 204) = 1.30 m
3. Set Low Level Value (2.8.4.3.) (Page 204) = 0.30 m
4. Set Assigned Relay (2.8.4.4.) (Page 204) to Relay 3.
Results:
• Activates alarm assigned to relay 3 when level is within range 0.3 to 1.3 m
• Resets alarm above 1.3 m or below 0.3 m
Use Alarm State (2.8.4.5.) (Page 204) to view the current state of the In-bounds Level Alarm.
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Operating Instructions, 04/2021, A5E33329501-AG
SITRANS LUT400