SENSITRON
A Halma Company
MT2276E
GALILEO 32
Manual (EN)
P. 15/14
3.8
EMERGENCY MODE
Special defined state in which the systems switches in case of main unit mal-
functioning or in case of degrading of SIL level, during operation, due to system
faults that may occur.
A typical emergency situation will lead to the following screen: The situations in
which the system should pass into the Emergency Mode are as follows:
A
Malfunctioning of one of the two microprocessors from the Main
Board of the Control Unit, detected by the microprocessor itself with
fault notification;
B
Malfunctioning of one of the two microprocessors from the Main
Board of the Control Unit, detected by the second microprocessor and
yet the faulty micro still continuing to operate without notifying fault;
C
The microprocessors, memories, multiplexers, DAC’s, relay drivers are
be monitored by a self testing facility implemented into the system’s
hardware and software. The control device will notify a system fault
should the associated procedures related to the self testing functions
are revealing any malfunction.
The system has three user levels and depending on these, various options are
available. The there levels are as follows:
I
OPERATOR level (O)
II
MAINTENANCE level (M)
III
ENGINEER level (E)
Once logged in as a certain level, a letter in the top right side of the screen will
inform about the level, as follows: “O” for Operator. “M” for Maintenance and “E”
for Engineer. If the user is not logged in, the allowed operations are as per Oper-
ator level without the permission to do the “ACK” of the events.
The user passwords can be created and/modified just by the PC configuration
software.
4.1
OPERATOR LEVEL
It is the lowest user level. In all screens the options are at the minimum. The
“Operator” user may only see the system’s configuration. He may browse the
system through channels and relays.
The “Operator” cannot put under Test or take out of Test mode any systems
part, nor he can Unset parts of the system, or Set parts of the system previously
unset. In normal operating mode the display will show the SYSTEM STATE and
will offer the possibility to scroll through the system channels,
The main screen for all user levels is as in the following picture:
4. User levels
Figure 4.1
Typical NORMAL state screen
