EB 8389-1S EN
39
On/off valve
1.
Device settings > Alarm settings
−
Travel time assessment limit (Code 49 - h7):
[0.6] to 30.0 s
−
Valve end position limit (Code 49 - h8):
[0.3] to 100.0 %
2.
Device settings > Alarm settings > Status
classification > On/off valve
−
Increasing breakaway time: [ ], , ,
−
Decreasing breakaway time:
[ ], , ,
−
Transit time increasing: [ ], , ,
−
Transit time (decreasing): [ ], , ,
−
Final travel/angle value not reached:
[ ], , ,
−
Increasing final travel/angle value:
[ ], , ,
−
Decreasing final travel/angle value:
[ ], , ,
5.2
Analysis and monitoring
The analysis pinpoints to a fault when at
least one of the following conditions is met
while the valve is moving:
−
The current 'Increasing breakaway time'
differs from the reference value by the
amount entered in 'Travel time assess
-
ment limit'.
−
The current 'Decreasing breakaway time'
differs from the reference value by the
amount entered in 'Travel time assess
-
ment limit'.
−
The current 'Transit time increasing' dif
-
fers from the reference value by the
amount entered in 'Travel time assess
-
ment limit'.
−
The current 'Transit time (decreasing)' dif
-
fers from the reference value by the
amount entered in 'Travel time assess
-
ment limit'.
−
The current 'Transit time increasing' dif
-
fers from the reference value by the
amount entered in 'Valve end position
limit'.
−
The current 'Transit time (decreasing)' dif
-
fers from the reference value by the
amount entered in 'Valve end position
limit'.
−
The valve end position is not reached.
Valve end position
(decreasing)
Valve end position
(increasing)
Breakaway time
(decreasing)
Transit time
(decreasing)
Breakaway time
(increasing)
Transit time
(increasing)
x [%]
w [%]
t [s]
Fig. 6:
Analysis of diagnostics for on/off valve
If one of these conditions is met, the position-
er generates an 'On/off valve status' mes
-
sage according the selected status classifica
-
tion.
Diagnostics > Monitoring
−
On/off valve status (Code 85):
, , ,
