ELPRO ECOLOG-NET LP4, Operation Manual

14 - EN

ECOLOG-NET LP4

EL6006Ee

Threshold value and alarm function

6.2 Window: Setup of Alarm parameters

6.3 Threshold value violation

1. In an active display, a threshold value violation is indicated by two arrows.



1.2 

Display

. They are 

only visible for the duration of the threshold violation. This status is not logged

2. The text: ALARM is displayed when the conditions for an alarm are fulfilled and depending upon the 

selected alarm output (self-sustaining), and the display/power-saving mode.

3. If an alarm is triggered, the ECOLOG-NET LP4 has a collective alarm function. This function is simul-

taneously activated with the text: ALARM activated



6.4 

Collective alarm contact functions

 and 9. 

Alarm diagrams

.

4. After the alarm delay time is up, an alarm is not registered in the memory until the next log interval 

has elapsed. All threshold violations / alarms are registered in the alarm protocol, even if they are 
shorter than the defined log interval!

Acknowledging alarm 
messages



Alarm messages can be acknowledged manually by using the PC software or the keypad.

Name

Function

Alarm on

Activate this checkbox to switch on the alarm threshold function,



6. 

Threshold 

value and alarm function

.

Alarm thresholds

Input fields for the lower and upper threshold values.

Hysteresis

The Hysteresis is used to avoid "fluttering" of the alarm contact. A change of state 
in the contact only occurs when the measured value deviates from from the thresh-
old by the amount of the hysteresis.

Alarm-
Delay Time

- normal
An alarm is not triggered until the threshold violation has lasted longer than the 
specified time.
- defrost on
If the "Check defroster" function is active and defrost contact D1 is closed, then an 
alarm is not triggered until the threshold violation has lasted longer than the time 
specified at this enter field.

Alarm output

This mode is used for all applications where the alarm contact controls an external 
device such as a flash or a telephone dialing unit.

- No selection made

The text: ALARM is displayed for the duration of the threshold violation.
The alarm contact is closed for the duration of the threshold violation.

- self-sustaining

This mode is used for all applications where the alarm contact controls an 
external device such as a flash or a telephone dialing unit.
The text: ALARM is displayed until a manual reset is executed.
The alarm contact remains closed until a manual reset is executed.

- Buzzer

Switches the buzzer on/off

Close /
Download /
status Print

These buttons are used to program the datalogger and to close the "Alarm Param-
eters Setup" window.