U.S. patent application number 09/208417 was filed with the patent office on 2001-08-16 for device and method for monitoring the operation of an industrial installation.
Invention is credited to CHAVAND, ANDRE.
Application Number | 20010013832 09/208417 |
Document ID | / |
Family ID | 9515118 |
Filed Date | 2001-08-16 |
United States Patent
Application |
20010013832 |
Kind Code |
A1 |
CHAVAND, ANDRE |
August 16, 2001 |
DEVICE AND METHOD FOR MONITORING THE OPERATION OF AN INDUSTRIAL
INSTALLATION
Abstract
The invention relates to a device for monitoring the operation
of an industrial installation (3) comprising functional members
(5), the said device (1) comprising groups (G.sub.1, G.sub.2 . . .
G.sub.n) of detectors (D.sub.1,1, . . . D.sub.n,j) that defect the
operating status of the installation (3) these each being
associated with a particular aspect of the monitoring, and a
display unit (11) comprising means (13) of communicating the
operating statuses picked up by the said detectors (D.sub.1,1, . .
. D.sub.n,j). The device comprises, arranged between the said
detectors (D.sub.1,1, . . . D.sub.n,j) and the display unit (11),
means (15) for processing the operating statuses picked up by the
said detectors (D.sub.1,1, . . . D.sub.n,j) and for controlling the
selective displaying, on the said display unit (11), of information
relating to overall operating statuses of predetermined groups
(G.sub.1, G.sub.2 . . . G.sub.n) of detectors (D.sub.1,1, . . .
D.sub.n,j).
Inventors: |
CHAVAND, ANDRE; (EYBENS,
FR) |
Correspondence
Address: |
BURNS DOANE SWECKER & MATHIS L L P
POST OFFICE BOX 1404
ALEXANDRIA
VA
22313-1404
US
|
Family ID: |
9515118 |
Appl. No.: |
09/208417 |
Filed: |
December 10, 1998 |
Current U.S.
Class: |
340/679 ;
340/500; 340/506; 340/605 |
Current CPC
Class: |
F17C 2250/032 20130101;
F17D 3/00 20130101; F17C 2250/036 20130101; F17C 2221/037 20130101;
G05B 23/0272 20130101; F17C 2250/043 20130101; F17C 13/02 20130101;
F17C 2260/038 20130101 |
Class at
Publication: |
340/679 ;
340/500; 340/506; 340/605 |
International
Class: |
G08B 021/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 24, 1997 |
FR |
9716489 |
Claims
1. Device for monitoring the operation of an industrial
installation (3), particularly an installation for supplying gas
for the manufacture of circuits in the microelectronics industry,
the said installation comprising functional members (5), the said
device (1) comprising groups (G.sub.1, G.sub.2 . . . G.sub.n) of
detectors (D.sub.1,1, . . . D.sub.n,p) that detect the operating
status of each of the functional members (5), each group (G.sub.1,
G.sub.2 . . . G.sub.n) of detectors being associated with a
particular aspect that is to be monitored, such as monitoring gas
leaks or monitoring the operating status of a functional member
(5), and a display unit (11) comprising means (13) of communicating
the operating statuses picked up by the said detectors (D.sub.1,1,
. . . D.sub.n,p), characterized in that it comprises, arranged
between the said detectors (D.sub.1,1, . . . D.sub.n,p) and the
display unit (11), means (15) for processing the operating statuses
picked up by the said detectors (D.sub.1,1, . . . D.sub.n,p) and
for controlling the selective displaying, on the said display unit
(11), of information relating to overall operating statuses of
predetermined groups (G.sub.1, G.sub.2 . . . G.sub.n) of detectors
(D.sub.1,1, . . . D.sub.n,p).
2. Device according to claim 1, characterized in that the means
(15) for processing and controlling the selective displaying
comprise a unit (19) via which an operator can input commands, and
means (21) for storing in memory plans, each of which depicts at
least part of the layout of the functional members (5) of the
installation, the said plans being intended to be displayed, under
the control of the operator, by the said display unit (11) together
with at least one item of information indicating on the displayed
plan the geographical position of at least one malfunction picked
up by at least one detector (D.sub.1,1, . . . D.sub.n,j) of a
predetermined group (D.sub.1,1, . . . D.sub.n,j).
3. Device according to claim 2, characterized in that the said
plans represent various levels of detail, and in that the means
(15) for processing and controlling the selective displaying
comprise means (23), under the control of the operator, for
selecting plans to move on from one level of detail to another.
4. Device according to claim 3, characterized in that the plans
with the highest level of detail each depict, as a synoptic view, a
basic entity, especially, a station (P.sub.1, P.sub.2, . . .
P.sub.o) for supplying or distributing gas, and in that the
communicating means (13) comprise means (25) of displaying, on
these plans with the highest level of detail, values of
measurements picked up by the detectors (D.sub.1,1, . . .
D.sub.n,j) associated with this basic entity and representing the
operating status thereof.
5. Device according to claim 3, characterized in that the said
plans comprise a general plan which has the lowest level of detail
and depicts the installation (3) in its entirety, this general plan
being intended to be displayed permanently and in parallel with
plans with a higher level of detail by the said display unit (11),
and in that the communicating means (13) comprise means (27) of
displaying, on this general plan, an item of information that
relates to the position of that part of the installation that is
depicted in parallel on another synoptic diagram with a higher
level of detail.
6. Device according to any one of claims 1 to 5, characterized in
that the means (15) for processing and controlling the selective
displaying comprise means (29) of coding the operating statuses so
that the said information can be displayed in coded form.
7. Device according to claim 6, characterized in that the code used
by the coding means (29) is a three-colour code, in which one
colour is associated with correct operation, one with a malfunction
of minor significance and one with a significant malfunction.
8. Method for monitoring the operation of an industrial
installation (3), particularly an installation for supplying gas
for the manufacture of circuits in the microelectronics industry,
the said installation comprising functional members (5),
characterized in that it comprises the following steps: the
functional status of the functional members (5) is detected, groups
of detected functional statuses are formed, each group being
associated with a particular aspect that is to be monitored, such
as the monitoring of gas leaks or the monitoring of the operational
status of a specific station, and overall operating statuses of the
said groups are displayed on a display unit (11).
9. Method according to claim 8, characterized in that it further
comprises a step which consists in the said display unit (11)
displaying, under the control of an operator, a plan that depicts
at least part of the layout of the functional members of the
installation together with at least one item of information
indicating on the displayed plan the geographical position of at
least one detected malfunction.
10. Method according to claim 9, characterized in that the said
plans depict various levels of detail and in that it further
comprises the step which consists in selecting, under the control
of the operator, a plan in order to move on from one level of
detail to another.
11. Method according to claim 10, characterized in that the said
plans with the highest level of detail each depict, in a synoptic
view, a basic entity, especially a station (P.sub.1, P.sub.2, . . .
P.sub.o) for supplying or distributing gas, and in that it
comprises the step which consists in displaying, on these plans
with the highest level of detail, values of measurements that
characterize the detected operating status.
12. Method according to claim 10, characterized in that the said
plans comprise a general plan which has the lowest level of
representation and depicts the installation (3) in its entirety,
and that it comprises the step which consists in displaying this
general plan permanently and in parallel with plans with a higher
level of detail on the said display unit (11), and in that there is
displayed on this general plan, an item of information that relates
to the position of that part of the installation that is depicted
in parallel on another synoptic diagram with a higher level of
detail.
13. Method according to any one of claims 8 to 12, characterized in
that it comprises the step which consists in coding the operating
statuses and in displaying the operating statuses in coded
form.
14. Method according to claim 13, characterized in that the code
used for coding is a three-colour code in which one colour is
associated with correct operation, one with a malfunction of minor
significance and one with a significant malfunction.
Description
[0001] The invention relates to a device and to a method for
monitoring the operation of an industrial installation,
particularly an installation for supplying gas for the manufacture
of circuits in the microelectronics industry.
[0002] The manufacture of microelectronic circuits requires the use
of various so-called "working" gases such as, for example,
Cl.sub.2, NH.sub.3, HCl, HBr, NF.sub.3, WF.sub.6, etc., which are
considered, for the most part, to be dangerous to man on account of
their toxicity and/or their flammability.
[0003] These gases are conveyed to consumer stations, such as
stations for manufacturing microelectronic circuits, via an
installation for supplying these stations with gas, this
installation comprising, for each gas, at least one station for
supplying gas, also known by the name of "gas cabinet" and possibly
a station for distributing the gas originating from a supply
station so that several manufacturing stations can be supplied at
the same time.
[0004] Because of the toxicity of the gases employed, a high
priority is given to monitoring the operation of such a supply
installation. In particular, in the event of a malfunction, it is
important to be able to quickly identify the nature and location of
the malfunction so that the required countermeasures can be taken
before the malfunction can cause material or even human damage.
[0005] This is why such installations are equipped with a device
for monitoring their operation comprising, on the one hand, groups
of detectors that detect the operating status of the installation
and, in particular, of each of the stations for supplying and
distributing gas, each group of detectors being associated with a
particular aspect of monitoring, such as monitoring gas leaks or
monitoring the operating status of a specific station and, on the
other hand, a display unit comprising means of communicating the
operating status so that, in particular, alarms can be raised.
[0006] The object of the invention is to provide a monitoring
device that makes it possible to present the operating status of an
industrial installation while at the same time effectively
identifying any malfunction or alarm detected.
[0007] To this end, the subject of the invention is a device for
monitoring the operation of an industrial installation,
particularly an installation for supplying gas for the manufacture
of circuits in the microelectronics industry, the said installation
comprising functional members, the said device comprising groups of
detectors that detect the operating status of each of the
functional members, each group of detectors being associated with a
particular aspect that is to be monitored, such as monitoring gas
leaks or monitoring the operating status of a functional member,
and a display unit comprising means of communicating the operating
statuses picked up by the said detectors, characterized in that it
comprises, arranged between the said detectors and the display
unit, means for processing the operating statuses picked up by the
said detectors and for controlling the selective displaying, on the
said display unit, of information relating to overall operating
statuses of predetermined groups of detectors.
[0008] The monitoring device according to the invention may
additionally have one or more of the following features:
[0009] the means for processing and controlling the selective
displaying comprise a unit via which an operator can input
commands, and means for storing in memory plans, each of which
depicts at least part of the layout of the functional members of
the installation, the said plans being intended to be displayed,
under the control of the operator, by the said display unit
together with at least one item of information indicating on the
displayed plan the geographical position of at least one
malfunction picked up by at least one detector of a predetermined
group,
[0010] the said plans depict various levels of detail, and the
means for processing and controlling the selective displaying
comprise means, under the control of the operator, for selecting
plans to move from one level of detail to another,
[0011] the plans with the highest level of detail each depict, as a
synoptic view, a basic entity, especially a station for supplying
or distributing gas, and the communicating means comprise means of
displaying, on these plans with the highest level of detail, values
of measurements picked up by the detectors associated with this
basic entity and representing the operating status thereof,
[0012] the said plans comprise a general plan which has the lowest
level of detail and depicts the installation in its entirety, this
general plan being intended to be displayed permanently and in
parallel with plans with a higher level of detail by the said
display unit, and the communicating means comprise means of
displaying, on this general plan, an item of information that
relates to the position of that part of the installation that is
depicted in parallel on another synoptic diagram with a higher
level of detail,
[0013] the means for processing and controlling the selective
displaying comprise means of coding the operating statuses so that
the said information can be displayed in coded form,
[0014] the code used by the coding means is a three-colour code, in
which one colour is associated with correct operation, one with a
malfunction of minor significance and one with a significant
malfunction.
[0015] Another subject of the invention is a method for monitoring
the operation of an industrial installation, particularly an
installation for supplying gas for the manufacture of circuits in
the microelectronics industry, the said installation comprising
functional members, characterized in that it comprises the
following steps:
[0016] the functional status of the functional members is
detected,
[0017] groups of detected functional statuses are formed, each
group being associated with a particular aspect that is to be
monitored, such as the monitoring of gas leaks or the monitoring of
the operational status of a specific station, and
[0018] overall operating statuses of the said groups are displayed
on a display unit.
[0019] The monitoring method according to the invention may
additionally have one or more of the following features:
[0020] the method further comprises a step which consists in the
said display unit displaying, under the control of an operator, a
plan that depicts at least part of the layout of the functional
members of the installation together with at least one item of
information indicating on the displayed plan the geographical
position of at least one detected malfunction,
[0021] the said plans depict various levels of detail and the
method further comprises the step which consists in selecting,
under the control of the operator, a plan in order to move on from
one level of detail to another,
[0022] the said plans with the highest level of detail each depict,
in a synoptic view, a basic entity, especially a station for
supplying or distributing gas, and the method comprises the step
which consists in displaying, on these plans with the highest level
of detail, values of measurements that characterize the detected
operating status,
[0023] the said plans comprise a general plan which has the lowest
level of representation and depicts the installation in its
entirety, and the method comprises the step which consists in
displaying this general plan permanently and in parallel with plans
with a higher level of detail on the said display unit, and there
is displayed on this general plan, an item of information that
relates to the position of that part of the installation that is
depicted in parallel on another synoptic diagram with a higher
level of detail,
[0024] the method comprises the step which consists in coding the
operating statuses and in displaying the operating statuses in
coded form,
[0025] the code used for coding is a three-colour code in which one
colour is associated with correct operation, one with a malfunction
of minor significance and one with a significant malfunction.
[0026] Other features and advantages of the invention will emerge
from the following description given merely by way of non-limiting
example, with reference to the appended drawings, in which:
[0027] FIG. 1 is a synoptic diagram of a device for monitoring,
according to the invention, the operation of an industrial
installation,
[0028] FIG. 2 depicts an image displayed by the display unit of the
monitoring device of FIG. 1, illustrating, in particular, two
plans, one of them corresponding to the lowest level of detail and
the other corresponding to the level of detail immediately above,
and
[0029] FIG. 3 depicts an image displayed on the display unit of the
monitoring device of FIG. 1, illustrating, in particular, two
plans, one corresponding to the lowest level of detail and the
other corresponding to the highest level of detail.
[0030] FIG. 1 is a synoptic diagram of a device 1 for monitoring
the operation of an industrial installation 3, such as, for
example, an installation for supplying gas for the manufacture of
circuits in the microelectronics industry.
[0031] This installation 3 comprises functional members 5 such as,
for example, stations P.sub.1, P.sub.2, . . . P.sub.o (o being any
natural number) depicted synoptically. These stations P.sub.1,
P.sub.2, . . . P.sub.o are, for example, stations for supplying
gas, also known by the name of "gas cabinets" or stations for
distributing the gas coming from one of the supply stations. Using
gas distribution stations it is possible, from just one gas supply
station, to supply several consumer stations (not depicted) at the
same time.
[0032] Given that these gas supply and distribution stations are
well known to those skilled in the art, they will not be described
in detail.
[0033] To monitor the operating status of the installation 3, the
device 1 comprises groups G.sub.1, G.sub.2, G.sub.3 . . . G.sub.n
(n being any natural number) of detectors.
[0034] The detectors of the various groups are referenced by the
capital letter D with, as a suffix, a first number which
corresponds to the number of the group, and a second number, which
corresponds to the number of the detector within this group.
[0035] Thus, detector D.sub.i,j is the jth detector belonging to
group number i (i, j, together with k, l, m, p which appear in FIG.
1, are any natural numbers).
[0036] Each group G.sub.1, G.sub.2, G.sub.3 . . . G.sub.n is
associated with a particular aspect to be monitored of the
industrial installation 3.
[0037] By way of example, the group G.sub.1 of detectors comprises
gas-leak detectors D.sub.1,1 to D.sub.1,k. These detectors
D.sub.1,1 to D.sub.l,k are installed at appropriate points in the
installation 3, such as, for example, in the rooms in which the gas
supply and distribution stations P.sub.1, P.sub.2, . . . P.sub.o
are installed.
[0038] The group G.sub.2 of detectors comprises, for example,
sensors D.sub.2,1 to D.sub.2,1 which sense the pressures prevailing
in the pipes through which gas flows at the gas distribution and
supply stations P.sub.1, P.sub.2, . . . P.sub.o, in order to
monitor the operating status of each specific station.
[0039] The group G.sub.3 of detectors comprises, for example, fire
detectors D.sub.3,1 to D.sub.3,m installed at appropriate points of
the installation 3.
[0040] In addition, the device 1 comprises a display unit 11
comprising means 13 of communicating the operating statuses picked
up by each D.sub.i,j of the detectors of the groups G.sub.1,
G.sub.2, G.sub.3 . . . G.sub.n.
[0041] Arranged between the detectors of the group G.sub.1,
G.sub.2, G.sub.3 . . . G.sub.n and the display means 11 are means
15 for, on the one hand, processing the operating statuses picked
up by each D.sub.i,j of the detectors and, on the other hand,
controlling the selective displaying on the display unit 11 of
information relating to overall operating statuses.
[0042] For this purpose, the means 15 comprise a central unit 17 to
which are connected, on the one hand, all of the detectors
D.sub.1,1, . . . D.sub.n,p, and, on the other hand, the
communicating means 13 of the display unit 11.
[0043] An overall operating status is to be understood as meaning
an operating status associated with a predetermined group G.sub.i
of detectors D.sub.i,l, . . . D.sub.i,k and corresponding either to
a correct operating status picked up by all of the detectors
D.sub.i,l, . . . D.sub.i,k of the predetermined group G.sub.1, or
to a malfunction or alarm picked up by at least one D.sub.i,j of
the detectors of the predetermined group G.sub.i.
[0044] Thus, for example, an alarm relating to a gas leak can
easily be distinguished from a malfunction which has occurred at a
gas supply station, and this can advantageously speed up the
decision-making process involved with the countermeasures to be
taken in the light of the alarm or malfunction detected.
[0045] Furthermore, the means 15 for processing and controlling the
selective displaying can be controlled by an operator responsible
for monitoring the entire installation 3, by means of a
command-input unit 19 connected to the central unit 17.
[0046] In addition, the means 15 for processing and controlling the
selective displaying comprise means 21 for storing in memory plans,
each of which depicts at least part of the layout of the premises
of the installation 3 and of the supply and distribution stations
P.sub.1, P.sub.2, . . . P.sub.o located in these premises. These
plans are intended to be displayed, under the control of the
operator via the command input through the unit 19, on the said
display unit 11 together with at least one item of information
indicating on the displayed plan the geographical position of at
least one malfunction picked up by at least one detector
D.sub.i,j.
[0047] These plans are at varying levels of detail, among which
there has been mentioned, in particular, a general plan which has
the lowest level of detail and depicts the installation in its
entirety, and plans with the highest level of detail each
depicting, in detail, as a synoptic view, a basic entity such as,
for example, a specific gas supply or distribution station
P.sub.i.
[0048] In the example described and as will be explained in greater
detail with reference to FIGS. 2 and 3, there are plans at three
levels of detail:
[0049] i) the general plan which has the lowest level of detail and
depicts the installation in its entirety,
[0050] ii) intermediate plans, each depicting one room of the
installation and the layout of the gas supply and distribution
stations within these rooms, and
[0051] iii) plans with the highest level of detail, depicting, in
detail, as a synoptic view, each of the gas supply or distribution
stations.
[0052] Of course, depending on the size of the installation, it is
possible to increase the number of levels of detail in the
drawings.
[0053] To select the plans to be displayed, the means 15 for
processing and controlling the selective displaying further
comprise, arranged between the memory-storage means 21 and the
central unit 17, means 23 for selecting the plans.
[0054] Depending, on the one hand, on the operator's command input
via the unit 19 and, on the other hand, on the plan displayed by
the unit 11, the means 23 make it possible to select from the
memory-storage means 21, a plan which is either at the level of
detail immediately above, or the level of detail immediately below
the level of detail of the plan displayed so as to allow the
operator to move on from one level of detail to another.
[0055] Furthermore, the communicating means 13 comprise means 25 of
displaying, on plans with the highest level of detail and depicting
a synoptic view of a basic entity, values of measurements picked up
by the detectors D.sub.i,j associated with this basic entity and
which represent the operating status thereof.
[0056] To make it easier for the operator to identify the
malfunctions or alarms on the image displayed by the unit 11, the
general plan is displayed on this display unit 11 permanently and
in parallel with one of the plans with a higher level of detail,
and communicating means 13 additionally comprise means 27 of
displaying on this general plan an item of information that relates
to the position of that part of the installation depicted in
parallel on the other plan with the higher level of detail.
[0057] In addition, the means 15 for processing and controlling the
selective display comprise means 29 for coding the operating
statuses so that the said information can be displayed in coded
form.
[0058] Advantageously, the code used by the coding means 29 is a
three-colour code in which one colour is associated with correct
operation, for example the colour green, one with a malfunction of
minor significance, for example the colour yellow, and one with a
significant malfunction, for example the colour red.
[0059] Advantageously, the device according to the invention
comprises a computer comprising a display screen, a keyboard and a
mouse, and the memories of which are loaded, on the one hand, with
the aforementioned plans and, on the other hand, with a program
designed to perform the operations of processing the operating
statuses picked up by the detectors and of controlling the
selective display on the said screen.
[0060] From hereon, the operation of the device will be described
with the aid of the images in FIGS. 2 and 3, which are displayed by
the display unit 11.
[0061] FIG. 2 shows an example of an image displayed on a screen by
the display unit 11 when the device 1 is in operation.
[0062] This image comprises, at the top of the screen, a first zone
50 in which icons I.sub.1, I.sub.2, I.sub.3 . . . I.sub.n are
displayed. Written within these icons I.sub.1, I.sub.2, I.sub.3 . .
. I.sub.n are the names of the groups G.sub.1, G.sub.2, G.sub.3 . .
. G.sub.n respectively of detectors with which they are
associated.
[0063] These icons I.sub.1, I.sub.2, I.sub.3 . . . I.sub.n are
permanently displayed in the zone 50 and communicate the overall
operating status of each group G.sub.i to an operator. Thus, even
if the operator checks out, for example, the operating status of a
specific station, the icons let him know, in real time, the
operating status of each group G.sub.i and therefore of the entire
installation 3 and this allows the operator to react quickly and
effectively when another malfunction occurs.
[0064] In the event of correct operation picked up by all of the
detectors of a group G.sub.i, the corresponding icon Ii is green.
When at least one of the detectors D.sub.i,j of the group G.sub.i
has picked up a malfunction of minor significance or a significant
malfunction, the corresponding icon I.sub.i changes colour and,
depending on the severity of the malfunction or of the alarm, turns
yellow or red.
[0065] To the right of the screen, the image comprises a zone 52 in
which the general plan with the lowest level of detail and which
depicts the installation in its entirety is displayed. In the
example under consideration, the installation 3 comprises three
rooms S.sub.1, S.sub.2 and S.sub.3. This general plan is also
permanently displayed.
[0066] In the rest of the image, the zone 54, a plan of the room
S.sub.3 is displayed. This plan is more detailed and forms part of
the intermediate level of detail. It shows the layout of the
various stations P.sub.1to P.sub.6 and the ways into and out of the
room S.sub.3.
[0067] In the image depicted, it has been considered, by way of
example, that the supply to the gas supply station P.sub.2 has been
cut.
[0068] In this case, one of the detectors of the group G.sub.2
which is associated with the station P.sub.2 transmits an alarm to
the means 15 for processing and controlling selective displaying.
The means 29 code this alarm and the unit 17 commands the
communication means 13 to display the icon I.sub.2 in red, which is
depicted in FIG. 2 by grey shading. Thus, the operator responsible
for monitoring the installation 3 is informed that a significant
malfunction has occurred at the gas distribution and supply
stations.
[0069] To obtain more detailed information about the malfunction,
particularly with a view to locating it, the operator enters a
command via the unit 19 for a plan of the room in which the
malfunction has occurred, that is to say the room S.sub.3, to be
displayed. On this plan of the room S.sub.3, the depiction of the
station P.sub.2 is also red, to let the operator know that the
malfunction has occurred at this station P.sub.2. At the same time,
and under the control of the means 27, the geographical position of
the room S.sub.3 with respect to the installation as a whole is
indicated on the general plan, also by oblique hatching.
[0070] In order to determine the precise nature of the malfunction
at the station P.sub.2, the operator enters a command via the unit
19 for a plan with the highest level of detail representing a
synoptic view of the station P.sub.2 to be displayed.
[0071] The screen of the unit 11 therefore displays the image
depicted in FIG. 3. This image differs from the image of FIG. 2 on
the one hand by the fact that the synoptic plan of the station
P.sub.2 is displayed in the zone 54 of the screen in place of the
plan of the room S.sub.3 in FIG. 2 and, on the other hand, by the
fact that displayed on this synoptic plan of the station P.sub.2
are values of measurements picked up by the detectors associated
with this station and which represent the operating status thereof,
this display of values being controlled by the display means
25.
[0072] The operator can thus immediately recognize the cause of the
alarm detected.
[0073] It can therefore be seen that the monitoring device
according to the invention advantageously allows an operator
responsible for monitoring the installation to quickly gain an
awareness of the operating status of the installation and
effectively identify the location and nature of the malfunction
that has occurred.
* * * * *