Siemens LMV36.520A1 - Setting the Time for Checking the Pressure Switch

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Building Technologies Division Basic documentation LMV36... CC1P7544en
Infrastructure & Citiies Sector 7 Basic unit 25.09.2013
Oil pressure switch-min
In all types of oil train, the minimum oil pressure is expected from phase 38. If no oil
pressure is detected when the maximum time (parameter 217) has elapsed or if,
subsequently, the oil pressure drops, the system initiates lockout.
No. Parameter
217
Max. Waiting time for detection of detector or pressure signal (e.g. homerun,
preignition «Lo»)
Error
code
Diagnostic
code
Meaning for the LMV36... system
20 0 Pressure switch-min (Pmin)
No min. oil pressure
20 1 Gas shortage start prevention
During the safety times (TSA1/TSA2), the signal from pressure switch-min is only
assessed after a certain period of time in order to ignore the pressure shocks that occur
the moment the valves open. The time to elapse for signal assessment can be
parameterized.
No. Parameter
269 Oil: Time to respond to pressure faults within safety time 1 (TSA1) and safety
time 2 (TSA2)
369 Fuel 1 oil: Time to respond to pressure faults within safety time 1 (TSA1) and
safety time 2 (TSA2)
7.3.8 Setting the time for checking the pressure switch
For oil pressure switch-min, the point in time from which the check is made can be
set via parameter 276 (active from phase 38, or from safety time
(TSA)).
No. Parameter
276 Oil: Pressure switch-min input
0 = inactive
1 = active from phase 38
2 = active from safety time (TSA)
376 Fuel 1 Oil: Pressure switch-min input
0 = inactive
1 = active from phase 38
2 = active from safety time (TSA)