1.1 basic situations introductions
The collection loses the company subordinate's isolated island
compressed air station, the year processing natural gas 200 million
cubic meters, yearly produces above the light hydrocarbon
approximately 13,000 tons, is a quite large-scale compressed air
station. Next supposes 500000, SW64, two turbo-charged, the
centrifuge, matches is mad, hot post and so on bunker, power
distribution. Among: 500,000 posts are Huo Nepali 威尔
HOWNIWELL S9000 which uses the model DCS control system, on the byte
condition are IFix6.0, the operating system are WIN98; The SW64 post is the American state treasury uncle
company's RR controller which uses, on byte condition software is
INTouch, the operating system is WINNT4.0; Two
turbo-charged posts are the Japanese Omron controllers which uses, on
the byte condition is IFix6.0, the operating system is WIN98;
The centrifuge post is 恒河 CS1000 which uses the model DCS
control system, on the position is configuration software, the
operating system which brings with 恒河 is WINNT4.0; Matches
was mad the post is American SIXNET which uses Corporation's
ST-GT-1210 controller, on byte condition software is PCAUTO, the
operating system which the Beijing three dimensional strength controls
is WIN2000; The hot bunker post control system is Mitsubishi's
PLC, on byte condition software is Beijing Kunlun Mountains passing
condition MCGS, the operating system is WIN2000; The power
distribution post is equipped with Xu Ji the power distribution
protection system as well as the supervisory system.
1.2 solid 时数 pick the system function design
Uses the Beijing three dimensional strength to control the
company PCAUTO to do for the number picks the system configuration
software, through erects each post control system real-time data local
area network gathering arrives take the optical fiber as in the
transmission medium station to the compressed air station control room
strength controls on the server, this server is loaded with the double
net card, simultaneously is connecting victory oil field WAN, is
on-line in the oil field, then carries on the real-time data WEB to
issue, meanwhile may save the real-time data fixed point to the oil
field in the source data system which constructs, produces each kind
of report form.
1.3 numbers pick the system function, the plan
design
Selects PCAUTO which the Beijing three dimensional strength
controls to do for system configuration software. Is responsible
to gather IFix, INTouch, MCGS, 恒河 CS1000, Xu Ji, the strength
controls configuration software and so on PCAUTO as well as supports
485 intelligences instrument reading; The system function
network develops the plain chart to be as follows;
1.4 systems applications technology introduction
1.4.1OPC introduced
OPC is take Microsoft Corporation's OLE/the COM technology as a
foundation, uses the customer/server model, the formulation one
industry control domain open style standard. OPC has established
the unified software interface standard between the industry control
device and the application software. Main solution monitor
routine if data pool interactive question.
Using the OPC technology, may carries on the seal to the scene
equipment and its the driver, forms the OPC server. The OPC
server carries on gathering to under to the equipment data, upwardly
completes the data exchange with the OPC customer application
procedure correspondence, like chart 1 shows. The OPC server has
shielded the scene level equipment driver; The customer
application procedure development personnel saw, is only the unified
connection which the OPC server provides, but does not need to care
about the scene equipment again the driver. So long as the
customer application procedure conforms to the OPC interface
specification, may carry on the data exchange with the OPC server.
Similarly, the hardware merchant only needs for the production
hardware equipment to develop a driver, then compiles a OPC server
according to the OPC standard, then, possesses according to the OPC
standard development customer application procedure all may carry on
the data with this hardware equipment interactive, but does not need
to compile the extra equipment driver.
Thus, in the industry scene monitor control system, the process
or the equipment monitor routine (or is monitors configuration
software), through the industry ethernet, may conveniently and the
scene equipment OPC server carries on the data interactive, obtains
field data which needs. On the one hand, the monitor routine may
read takes the OPC server buffer (Cache) the center data, obtains the
process or the equipment movement parameter, the implementation
effectively monitors; On the other hand, regarding the timely
request quite high equipment data, the monitor routine may straight
respectfully received and read takes the equipment (Device) the center
data. If the user needs to expand monitors software the
function, could directly have custom-made the OPC software package
configuration will enter in existing software, but will not need to
worry the first floor the equipment driver, will cause software the
disposition to change easily.
1.4.2 DDE introduction
Dynamic data exchange (DDE), namely Dynamic Data Exchange abbreviation. It is also Microsoft
Corporation proposes, at present mainly or applies in win98 and on the
winnt4.0 operating system, only was gives on the new operating system
has been compatible. DDE is based on the WINDOWS news mechanism,
two WINDOWS application procedure through mutually between transmits
the news to carry on "the dialogue", thus completes the data the
request, the reply, the transmission, these two procedures separately
are called "Server" and "Client". Server is the data tenderer,
Client is the data request and the receiver. DDE Server is
maintaining the data procedure which other WINDOWS procedure possibly
uses, but DDE Client is obtains these data from Server the procedure.
Once "Server" and "Client" has established the connection
relations, then after "Server" the center data changes to be able to
inform "Client" immediately. Through the DDE way establishment
data connection channel is bidirectional, namely "Client" not only can
read takes "Server" the center data, but also can carry on the
revision to it.
The DDE way communication, mainly is the establishment between 2
WINDOWS application procedure, the current majority still supported
DDE based on the Windows application procedure, but DDE shortcoming
also very obvious, that was corresponds the efficiency to be low, when
correspondence data quantity big 时数 according to renovated slowly.
1.4.3 strength control the region real-time
database the distributional application.
The real-time database is the configuration software core part,
the real-time database movement system completes to database each kind
of operation, including: The real-time data processing, the
history data storage, statistical data processing, reports to the
police processing, digital data service request processing and so on.
The strength controls at the same time the
real-time database system also is a distributional database system.
Because many situations requests saves the database in the
geography distributes in on the different position different computer,
realizes in physics through the computer network to distribute, in the
logic concentrates the database, namely has the distributional
transparency. Makes an effort to control the foundation the
database, the data distributes in physics in the different
geographical position or on the identical position different computer,
but when user operation cannot feel the data the distribution.
The user saw is not a dispersible database as if, but is a data
pattern for the overall situation data pattern central database.
When constructs the strength controls the distributional
database, the strength controls the system support the network mailing
address to include: TCP/IP network, serial communication
(RS232/422/485), telephone digit dialing network and so on.
The strength controls the database and the
management system management system performance introducedthat,
The true distributional structure, simultaneously supports
C/S , the B/S application; The distributional
database structure may wilfully set up each kind of scale the
enterprise application; The real-time database system has
redundant reliable and the data integrity; Provides the function
formidable enterprise level real-time information system customer end
application tool; The nimble expansion structure may satisfy the
user each kind of demand; Tells data storage and retrieval
function; The real-time database is the independent advancement,
may separate the movement with HMI; Has realized a millisecond
progression according to gathering and gathering time synchronization;
To the high compression compares the preserved data, has
realized the historical data mass memory; Supports standard and
so on OPC, DDE, ODBC, ActiveX; May from DCS, PLC, in and all
that SCADA system the read-write process data.
On 1.4.4 RS485 main line
intelligence instrumented data reads takes
Some posts have installed many intelligent measuring appliances,
for instance the gas flow counter and so on, this kind of measuring
appliance interior integrated the digital circuit, may complete the
partial data processing function, and the data preservation in the
measuring appliance register, and supports the RS485 way the data
transmission, therefore we on compose this kind of intelligent
measuring appliance classification or several 485 networks, controls
the strength the server also to link in 485 networks, does is 485
networks main engines, on the main line other measuring appliances,
does for from machine, the main engine to from machine sends the order
through the main line according to the communication agreement in,
from machine checks in data to read. If 485 networks surpass 2,
installs the multi- strings mouth card on the server to solve.
Then controls in PCAUTO in the strength to establish the
intelligent measuring appliance the I/O actuation, if cannot find this
kind of measuring appliance the actuation, may defer to the RS485
communication agreement which the measuring appliance factory
provides, imitates actuation form which the strength controls
provides, own compile the measuring appliance the actuation.
Then may control in PCAUTO in the strength simple to carry on
the configuration establishment, reads takes the intelligent measuring
appliance the reading.
1.5 systems constructions process
1.5.1 horizontal rivers CS1000
system fetching
The OPC customer and the OPC server carry on the data
alternately to have 2 visits ways: Synchronization and
asynchronous way. Synchronous mode realization simpler, the
customer sends out the read-write request to the server, then waited
for the server returns to the information, when the customer data are
less moreover with server interactive data quantity quite few times
may select this method, however when the network stops up or the
massive customers visit, can create the system the performance
efficiency to drop.
Asynchronous way realization more complex, the customer sends
out the read-write request after the server, the server returns to the
information to express immediately the request has accepted, the
customer may carry on other processing, after the server completes the
read-write operation, through moves 用回 adjusts the function, the
notice customer procedure operation completes, and transmission
corresponding information, therefore the asynchronous way efficiency
is higher, can avoid blocking which the multi- customers big data
requested, and may maximum limit save CPU and the network resources.
The horizontal river opc data alternately belongs to the
asynchronous way, needs to register several related dynamic
connections storehouses document on the customer end computer to the
operating system, like this can complete opc Client and the Server
data interactive.
Then controls in PCAUTO in the strength to define the I/O
equipment, increases OPC Client, after matches the IP address,
renovates may find corresponds in IP CS1000 computer system OPC Server, the disposition process following chart:
After disposes OPC Client, controls in the strength inside the
database configuration, increases the corresponding data point,
following chart:
Like this completed horizontal river CS1000 OPC to control in
PCAUTO in the strength the disposition, was allowed in the
synchronized horizontal river CS1000 system data.
After completes one of configuration pictures to be as follows
1.5.2 热媒 stoves hillocks Mitsubishi PLC OPC
fetching process
Mitsubishi's PLC quite general, supports this hardware OPC the Server procedure to be very many, we choose are
KepServer software. This procedure support very many hardware,
may in after the hardware establishment communication, the first floor
equipment real-time data fetching by the OPC Server form
issue and other software carry on the data interactive, completes on
function and so on position monitoring, parameter establishment.
Disposition process following chart:
After disposes OPC Server, similarly controls
inside PCAUTO in the strength to increase the I/O equipment
Again controls PCAUTO in the strength inside the real-time
database configuration to increase the database spot.
The configuration completes after as follows the picture:
The 1.5.3DDE way takes IFIX the number
IFIX software supports Microsoft the DDE dynamic data exchange,
we design are install set of strength in the post from the monitoring
machine to control, make an effort to control through the DDE way and
IFIX carry on the data interactive, then the advantage makes an effort
to control PCAUTO the network data pool function, receives IFIX from
the server the real-time data.
First must start inside IFIX DDE the Server
module, establishes this module also starts along with IFIX, such IFIX
can in the movement, support DDE the procedure.
Then controls inside PCAUTO in the strength to increase DDE the
I/O equipment:
Again controls PCAUTO in the strength inside the real-time
database configuration to increase the database spot.
The configuration completes after as follows the picture:
The 1.5.4NETDDE way takes INTouch the data
Netdde is carries on the data interactive one way through the
network with the aid of DDE, in uses in front of Netdde, must carry on
DDE to 2 computers some correlation dispositions, increases the DDE
sharing, the trust sharing establishment and so on, the concrete
establishment sees attempts:
Again controls PCAUTO in the strength inside the
real-time database configuration to increase the database spot.
The configuration completes after as follows the picture:
1.5.5 takes the intelligent measuring appliance
the reading
Takes the intelligence instrument reading the key found the
appropriate I/O actuation, if is the quite common measuring appliance,
the strength controls generally all supports, then increases this
measuring appliance in the I/O equipment which the strength controls
the actuation, then inside database 组点 then. Has some
uncommon measuring appliance, may find its 485 communications
agreements original text, controls the actuation according to the
strength which provides to develop the SDK package, own carry on the
development.
Under is we several electric instruments related parameter
charts which read through 485 ways take:
1.6 references
"Monitoring Configuration Software And its
Application" horse national essence
The OPC technology was clean in supervisory system application Si Jigang Xu
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