Festo — MSE6-E2M — 2022-08d
Functions
15
DT synchronisation and DP2 OGR critical limit monitoring
The time diagrams show the DT synchronisation and DP2 OGR critical limit monitoring.
Pressure
P2
DT
t
0
DT
DT
DT
DT
DT
DP2
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
Blocking
DT synchronisation on
switching on the shut-off valve at t = t
4
0
Pressure
change
DP2
DP2 =
P2(t
1
)
- P2(t
0
)
DP2 =
P2(t
2
)
- P2(t
1
)
DP2 =
P2(t
3
) - P2(t
2
)
DP2 =
P2(t
5
)
- P2(t
4
)
DP2 =
P2(t
6
)
- P2(t
5
)
t
DP2 =
P2(t
7
)
- P2(t
6
)
DP2 signal extension
for DT synchronisation from t = t
4
DP2_OGR
Amount
of
pressure
change:
ABS(DP2)
t
No ABS(DP2) calculation
Diagnostics
message
t
Upper critical limit
exceeded:
ABS(DP2) > DP2_OGR
Message
active
Fig. 6: DT synchronisation and DP2 OGR critical limit monitoring
5.1.4.2
Function structure
Input signal
The measured pressure change value DP2 is processed in accordance with the set unit pressure,
Pm.8.0-8.1, pressure change sample time, Pm.10, parameters and can be displayed as a selectable
input signal in Em.5.
