![background image](http://html.mh-extra.com/html/abb/relion-615-series/relion-615-series_technical-manual_2395124.webp)
AI_RANGE#=1
AI_RANGE#=3
AI_RANGE#=0
Hysteresis
Val high high limit
Val high limit
Val low limit
Val low low limit
AI_RANGE#=2
AI_RANGE#=4
Y
t
AI_RANGE#=0
Value Reported
Value maximum
Value minimum
Out of Range
GUID-6A6033E6-22C8-415D-AABD-D0556D38C986 V1 EN
Figure 31:
Limit value supervision for RTD
The range information of “High-high limit” and “Low-low limit” is combined from all
measurement channels to the Boolean ALARM output. The range information of “High
limit” and “Low limit” is combined from all measurement channels to the Boolean
WARNING output.
Table 54:
Settings for RTD analog input limit value supervision
Function
Settings for limit value supervision
RTD analog input
Out of range
Value maximum
High-high limit
Val high high limit
High limit
Val high limit
Low limit
Val low limit
Low-low limit
Val low low limit
Out of range
Value minimum
When the measured value exceeds either the
Value maximum
setting or the
Value
minimum
setting, the corresponding quality is set to out of range and a maximum or
minimum value is shown when the measured value exceeds the added hysteresis,
respectively. The hysteresis is added to the extreme value of the range limit to allow the
measurement slightly to exceed the limit value before it is considered out of range.
3.13.2.8
Deadband supervision
Each input has an independent deadband supervision. The deadband supervision function
reports the measured value according to integrated changes over a time period.
Section 3
1MAC059074-MB A
Basic functions
118
615 series ANSI
Technical Manual
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