Man L23/30DF, Project Manual

Page: 291 / 392

D. Software created signal
Software created signal from PI 22, TI 12, SI 90.
SAH 81 is always activated together with SSH 81.
E. Set points depending on fuel temperature
Figure 1: Set point curve
F. Start interlock
The following signals are used for start interlock/blocking:
1. Turning must not be engaged
2. Engine must not be running
3. "Remote" must be activated
4. No shutdowns must be activated.
5. The prelub. oil pressure must be OK, 20 min. after stop.
6. "Stop" signal must not be activated
G. Start failure
If remote start is activated and the engine is in blocking or local mode or
turning is engaged the alarm time delay is 2 sec.
Start failure will be activated if revolutions are below 50 rpm within 5 sec.
from start or revolutions are below 210 rpm 10 sec. from start.
Start failure alarm will automatically be released after 30 sec. of activation.
H. Alarm hysterese
On all alarm points (except prelub. oil pressure) a hysterese of 0.5% of full
scale are present. On prelub. oil pressure alarm the hysterese is 0.2%.
I. Engine run signal
The engine run signal is activated when engine rpm >780 lube oil pressure
>3.0 bar or TC rpm >5000 rpm.
If engine rpm is above 210 rpm but below 780 rpm within 30 sec. the engine
run signal will be activated.
Description
Operation data and set points
3700061-5.9
2017-10-11 - en
B 19 00 0
MAN Diesel & Turbo
4 (5) SaCoSone
L27/38S; L27/38 EN