B
DTRen-2008/SPA-5/LVA
Rev.:
a
Page 3
Bombardier Transportation (ZWUS) Polska Sp. z o.o.
1
DOCUMENT REVISION
Revision Date
Author
Remarks
Change
No.
2008.12.16
Bart
ł
omiej Pawe
ł
ek Document
created
0
2009.06.17 Tomasz Pisarek
Document verification
E150/2009
a 2009.11.02
Bart
ł
omiej Pawe
ł
ek
Update CP chapter, figures update
E317/2009
2
ABBREVIATIONS AND DEFINITIONS
LX
Automatic Level Crossing System. Set of devices that
automatically warn road users about approaching
trains.
LX
disengagement
(released state)
LX status when warning devices are active and don’t
forbid road users to enter the crossing.
LX engagement
LX status when warning devices are active and forbid
road users to enter the crossing.
LX safe state
LX state when normal operation of the system is
stopped, road signals forbid road users to enter the
crossing (as long as batteries are full).The only way-
out of the safe state is manual system restart.
Critical failure
Failure that causes loss of the system operation
credibility and causes that system falls to the safe
state, i.e. loss of communication between control
channels, no PLC power supply, software operation
failure detection.
PLC
Programmable Logic Controller
CP
Control Panel
This
training
material
has
been
prepared
only
for
educational
purposes
and
it
isn't
technical
documentation.
