ABB SACE Tmax XT5 Operation And Maintenance Manual page 173

Alarm signals Up to three alarm thresholds (independent of each other), Threshold A, Threshold B, Threshold C, can be
States and alarms The state of all control thresholds can be checked in the Warnings/Alarms page
171 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
activated and configured for each input in the Protection parameters - Other parameters A (and B if dual set
is activated) page
Each alarm threshold has the following configuration parameters:
NOTE: the table lists the parameters of threshold A of input I42; the names and references
of all the other thresholds and inputs change
Parameter Description
Threshold A
Activates verification of input I42 with alarm Threshold A
enable
Threshold A
Defines whether the alarm must activate when measurement is above (Up)
hysteresis
or below (Down) the set value, with reference to the Threshold A setting
direction
Alarm threshold A of input I42. The value is given in degrees Celsius (°C)
and can be set within the range: -40°C to 240°C, in 0.1°C steps.
Threshold A
NOTE: the thresholds of the 4-20mA (I41 and I51) Current Loop
value
input are given in percentage form and can be set within the range:
0% to 100 %, in 0.1% steps (each step equivalent to 0.016µA)
Hysteresis value, valid for quitting the alarm condition if the set Treshold A
alarm threshold has been exceeded.
The hysteresis parameter only allows positive values. The trip unit decides
whether to add or subtract this value to or from the alarm threshold on the
basis of the direction parameter, example:
• Direction = Up, Value = 200°C, hysteresis= 10°C, the alarm activates
Threshold A
over 200° and de-activates below 190°C
hysteresis
The value is expressed in degrees Celsius (°C) and can be set within the
range: 0°C to 50°C with 0.1°C steps.
NOTE: the thresholds associated with the 4-20mA (I41 and I51)
Current Loop input are given in percentage form and can be set
within the range 0% to 30 %, in 0.1% steps (each step equivalent to
0.016µA)
ABB | SACE Tmax XT
Default
Off
Up
200 °C (I42,
I43, I44, I52,
I53, I54) / 50
% (I41, I51)
1 °C (I42,
I43, I44, I52,
I53, I54) / 1
% (I41, I51)
External accessories | 15 - Ekip Signalling 3T