CN111007795B - Equipment monitoring system and safety protection method - Google Patents

Equipment monitoring system and safety protection method Download PDF

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Publication number
CN111007795B
CN111007795B CN201911385702.5A CN201911385702A CN111007795B CN 111007795 B CN111007795 B CN 111007795B CN 201911385702 A CN201911385702 A CN 201911385702A CN 111007795 B CN111007795 B CN 111007795B
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valve
electric
opc
entering
authority
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CN111007795A (en
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李蕃
李志东
刘彬
杨硕
马常松
钱世玺
谢隽
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Research Institute of Physical and Chemical Engineering of Nuclear Industry
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Research Institute of Physical and Chemical Engineering of Nuclear Industry
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/058—Safety, monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/14—Plc safety
    • G05B2219/14006—Safety, monitoring in general
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

The invention discloses an equipment monitoring system with a valve remote control safety protection function and a safety protection method, wherein the monitoring system adopts a communication method based on an OPC (optical proximity correction) technology and comprises an upper computer, and a card reader, a Siemens PLC300 and a valve controller which are respectively and electrically connected with the upper computer; the safety protection method comprises the following steps: controlling operation authority; and (II) linkage control of the electric valve. The invention adds the function of preventing false touch in the monitoring system, effectively avoids the condition of misoperation of testers, realizes the safety protection of the remote control of the valve, improves the reliability of the remote control of the valve, can simultaneously complete the data interaction with the valve controller and the card reader based on the communication technology of the OPC technology, reduces the quantity of communication software and improves the operating efficiency of the monitoring system.

Description

Equipment monitoring system and safety protection method
Technical Field
The invention belongs to the technical field of safety protection for remote control of hardware equipment, and particularly relates to an equipment monitoring system with a valve remote control safety protection function and a safety protection method.
Background
The monitoring system of the special equipment is mostly a data acquisition monitoring system. The valve is usually realized by a PLC or a valve controller on an industrial field to realize data interaction with a man-machine interaction interface of a special equipment monitoring system. In field tests, a tester can remotely control the valve on a human-computer interaction interface, and in such a case, misoperation of the tester may occur.
Disclosure of Invention
The invention is provided for overcoming the defects in the prior art, and aims to provide an equipment monitoring system with a valve remote control safety protection function and a safety protection method.
The invention is realized by the following technical scheme:
an equipment monitoring system with a valve remote control safety protection function comprises an upper computer, and a card reader, a Siemens PLC300 and a valve controller which are respectively and electrically connected with the upper computer;
the card reader identifies an authorization card and judges whether a valve is opened for controlling authorization; the Siemens PLC300 is respectively connected with the plurality of electric valves and the plurality of electromagnetic pneumatic valves, collects parameters of all the electric valves and the electromagnetic pneumatic valves and controls the electric valves and the electromagnetic pneumatic valves to realize actions; the valve controller is connected with the electric regulating valve, collects parameters of the electric regulating valve and controls the electric regulating valve to realize actions; the electric adjusting valve, the electric valve and the electromagnetic pneumatic valve are used for controlling the pipeline.
In the technical scheme, the upper computer adopts a PC (personal computer) or an industrial personal computer; and the upper computer is provided with upper computer monitoring software WinCC and communication software based on OPC technology.
In the above technical solution, the card reader is connected to the upper computer through an ethernet, and a communication protocol of the card reader is a UDP communication protocol.
In the technical scheme, the card reader transmits the authorization information to the monitoring software WinCC carried by the upper computer for processing through a communication method based on the OPC technology.
In the above technical solution, the communication protocol of the valve controller is an RS232 communication protocol.
In the above technical solution, the communication method based on the OPC technology is used for implementing communication with a valve controller and communication with a card reader to complete a valve card swiping authorization function, and specifically includes the following steps;
reading a configuration file, wherein the configuration file comprises serial port configuration of a valve controller RS232 and UDP configuration of a card reader;
(ii) judging whether the OPC registers the service, if so, entering the step (iv); if the service is not registered, entering step (iii);
(iii) registering an OPC service, and entering step (iv);
(iv) starting OPC service:
uploading the opening and closing state and opening parameters of the electric regulating valve and the opening and closing state of the valve authority variable to WinCC in real time;
in the above technical solution, the step (iv) of starting the OPC service includes:
(a) Communicating with a valve controller
Reading a remote control command from WinCC, analyzing data, sending the data to a valve controller in a serial port data format, analyzing and converting the data after feedback into corresponding OPC variable data after receiving the feedback from the valve controller, and transmitting the data to WinCC for display processing through an OPC interface;
(b) Communicating with a card reader
Reading card number information of the card reader, establishing an OPC variable of the valve authority, judging whether the valve authority is opened or not, transmitting the OPC variable of the valve authority to WinCC, and switching the operable authority of the valve on an interface.
A valve remote control safety protection method of an equipment monitoring system comprises the following steps:
controlling operation authority;
and (II) linkage control of the electric valve.
In the above technical solution, the step (i) of controlling the operation authority includes:
starting;
(ii) determining whether the valve authority variable is activated, and if so, entering step (iii); if not activated, entering step (xi);
(iii) starting timing when the activation time of the valve authority variable is 30 s;
(iv) the valve authority variable is activated, and a WinCC interface of the upper computer remotely operates a valve button;
(v) judging whether the valve state is in place, if so, entering a step (vi); if not, entering step (vii);
(vi) turning on the button to the inoperable state and turning off the button to the operable state, and entering into step (viii);
(vii) opening the button in an operable state and closing the button in an inoperable state, entering step (viii);
(viii) determining whether the activation time of the valve permission variable reaches 30s, if so, entering step (ix); otherwise, returning to the step (iv), and remotely operating the valve button to keep the appearance state;
(ix) disappearance of the remotely operated valve button;
(x) the valve authority variable reverts to the inactive state;
(xi) Reading the Siemens PLC300 data, and acquiring the states of the electric valve and the electromagnetic pneumatic valve;
(xii) Reading data of a valve controller, and acquiring the opening and closing state and opening parameters of the electric regulating valve;
(xiii) Finishing;
and the valve authority variable is obtained by reading a card number through a card reader.
In the above technical solution, the step (ii) of linkage control of the electric valve includes:
starting;
(ii) initializing a program to ensure that a relay for controlling the electric valve is in a release state;
(iii) receiving a command of opening the No. I electric valve;
(iv) judging whether the No. I electric valve is opened or not, and if so, entering the step (v); if not, entering the step (vi);
(v) keeping the No. I electric valve not in operation, namely keeping the current state;
(vi) judging whether the No. II electric valve linked with the No. I is in an opened state, if so, entering the step (v); if the electric valve II is not opened, the step (vii) is carried out;
(vii) opening the motorized valve # I;
(viii) judging whether the electric valve I returns to the start position state, if yes, entering the step (ix); if not, returning to the step (viii) for cycle judgment;
(ix) releasing the relay, closing the motor of the # I electric valve;
(x) is over.
The beneficial effects of the invention are:
the invention provides an equipment monitoring system with a valve remote control safety protection function and a safety protection method.
Drawings
FIG. 1 is a schematic structural diagram of an equipment monitoring system with valve remote control safety protection function according to the present invention;
FIG. 2 is a flow chart of a communication method based on OPC technology according to the present invention;
FIG. 3 is a flow chart of the control of operating authority in the present invention;
FIG. 4 is a flow chart of the interlocking control of the electric valve in the present invention; .
Wherein:
1 upper computer 2 card reader
3 Siemens PLC300 4 valve controller
5 electric regulating valve 6 electric valve
7 electromagnetic pneumatic valve
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description, with reference to the accompanying drawings, further describes the technical solution of the apparatus monitoring system with valve remote control safety protection function and the safety protection method according to the present invention through a specific implementation manner.
Example 1
As shown in fig. 1, an equipment monitoring system with a valve remote control safety protection function comprises an upper computer 1, and a card reader 2, a siemens PLC3003 and a valve controller 4 which are respectively and electrically connected with the upper computer 1;
the card reader 2 identifies an authorization card and judges whether a valve is opened for controlling authorization;
the Siemens PLC300 is respectively connected with the plurality of electric valves 6 and the plurality of electromagnetic pneumatic valves 7, and is used for acquiring parameters of all the electric valves 6 and the electromagnetic pneumatic valves 7 and controlling the parameters to realize actions;
the valve controller 4 is connected with the electric regulating valve 5, collects parameters of the electric regulating valve and controls the electric regulating valve to realize actions;
the electric regulating valve 5, the electric valve 6 and the electromagnetic pneumatic valve 7 are used for controlling the pipeline.
The upper computer 1 adopts a PC or an industrial personal computer, and operates upper computer configuration software WinCC and communication software based on OPC technology.
And the configuration software WinCC of the upper computer displays all the received valve parameters and realizes a remote control function. WinCC displays the states of the three valves, and when the operation authority of the valves is not opened, the operation buttons of the valves are controlled not to be displayed; when the valve operation authority is received, the control valve operation button appears, and after the authority time is 30s, the control valve operation button disappears. After the valve operation button of the electric valve is operated and before the feedback state is received, the valve operation button is not operable, and after the feedback state is received, the valve operation button can be operated.
And communication software based on the OPC technology realizes the functions of data interaction with a valve controller, data interaction with a card reader and data interaction with WinCC. The communication software realizes data interaction with WinCC in an OPC mode.
The card reader 2 is connected with the upper computer 1 through the Ethernet, and the communication protocol of the card reader is UDP communication protocol. The card reader 2 transmits the authorization information to upper computer monitoring software WinCC for processing in an OPC mode.
And the WinCC of the upper computer 1 remotely controls the electric valve and the electric regulating valve through the Siemens PLC 300.
The communication protocol of the valve controller 4 is RS232 communication protocol. The valve controller 4 is used for realizing communication with the electric regulating valve, analyzing serial port data format instruction data, realizing full opening, full closing and fine adjustment functions of the valve, and packaging and sending the opening degree value through the serial port data format.
The communication method based on the OPC technology is used for realizing the communication with a valve controller and the communication with a card reader to finish the valve card swiping authorization function, and specifically comprises the following steps;
reading a configuration file, wherein the configuration file comprises serial port configuration of a valve controller RS232 and UDP configuration of a card reader;
(ii) judging whether the OPC registers the service, if so, entering the step (iv); if the service is not registered, entering step (iii);
(iii) registering an OPC service, and entering step (iv);
(iv) opening OPC service:
uploading the opening and closing state and opening parameters of the electric regulating valve and the opening and closing state of the valve authority variable to WinCC in real time;
(a) Communicating with a valve controller
Reading a remote control command from WinCC, analyzing data, sending the data to a valve controller in a serial port data format, analyzing and converting the data after feedback into corresponding OPC variable data after receiving the feedback from the valve controller, and transmitting the data to WinCC for display processing through an OPC interface;
(b) Communicating with a card reader
Reading card number information of the card reader, establishing an OPC variable of the valve authority, judging whether the valve authority is opened or not, transmitting the OPC variable of the valve authority to WinCC, and switching the operable authority of the valve on an interface.
As shown in fig. 2, the communication flow based on the OPC technique includes:
s11: starting;
s12: reading a configuration file, wherein the configuration file comprises serial port configuration of a valve controller RS232 and UDP configuration of a card reader;
s13: judging whether the OPC registers the service, and entering S15 if the OPC registers the service; if the unregistered service is not registered, entering S14;
s14: registering OPC service, and entering S15;
s15: opening OPC service, mainly used for uploading the on-off state and opening degree parameter of the electric regulating valve, the valve authority variable on-off state to WinCC in real time, and reading the command from WinCC remote control valve;
s16: the electronic control valve is communicated with the electronic control valve and is mainly used for reading the opening and closing state and opening parameters of the electronic control valve; transmitting a control valve command to the electric regulating valve to realize the switching operation function of the electric regulating valve;
s17: the card reader is communicated with and mainly used for reading the card number and determining whether the card number is an authorized card number;
s18: and (6) ending.
Example 2
Based on embodiment 1, the reliability of remote control of the valve is further improved, and the method for remotely controlling and protecting the valve of the equipment monitoring system is characterized in that: the method comprises the following steps:
controlling operation authority;
as shown in fig. 3, a WinCC interface operation flow chart realizes remote control safety protection of a valve by controlling operation authority through the design of a WinCC interface, and includes the following specific steps:
s19: starting;
s20: judging whether the valve authority variable is activated or not, and if the valve authority variable is activated, entering S21; if not, entering S29;
s21: the activation time of the valve authority variable is 30s, and timing is started;
s22: the valve authority variable is activated, and a remote operation valve button appears on a WinCC interface;
s23: judging whether the valve is in place, if so, entering S24; if not, entering S25;
s24: the opening button is in an inoperable state, the closing button is in an operable state, and the process goes to S26;
s25: the on button is in an operable state, the off button is in an inoperable state, and the process goes to S26;
s26: judging whether the activation time of the valve authority variable reaches 30S, and if the activation time reaches 30S, entering S27; otherwise, returning to S22, and the remote operation valve button keeps the appearance state;
s27: the remote operation valve button disappears;
s28: the valve authority variable is restored to an inactivated state;
s29: reading the Siemens PLC300 data to obtain the states of the electric valve and the electromagnetic pneumatic valve;
s30: reading data of a valve controller, and acquiring the opening and closing state and opening parameters of the electric regulating valve;
s31: and (6) ending.
And (II) linkage control of the electric valve.
As shown in fig. 4, when the electric valves are opened and closed, the electric valves have an interlocking function, that is, the paired electric valves can open only one of the valves at most at the same time, taking the electric valve a and the electric valve B as an example, the method includes the following steps:
s1: starting;
s2: initializing a program, and ensuring that a relay for controlling the electric valve is in a release state, namely, not carrying out any operation on the electric valve;
s3: receiving a command of opening the electric valve A;
s4: judging whether the electric valve A is opened or not, and if so, entering S5; if not, entering S6;
s5: the electric valve A does not act, namely the current state is kept unchanged;
s6: judging whether the electric valve B is in an opened state, if so, entering S5; if the valve B is not opened, S7 is entered;
s7: opening the electric valve A;
s8: judging whether the electric valve A returns to the opening state, and if the electric valve A is opened in place, entering S9; if not, returning to S8 for cyclic judgment;
s9: releasing the relay and closing the motor of the valve A;
s10: and (6) ending.
The invention ensures the reliability of the remote control of the valve through the safety protection design of three aspects:
firstly, the pair of electrically operated valves has a linkage function, so that the safety of pipeline feeding can be effectively protected, and the safety of industrial field tests is ensured;
when the WinCC remote control electric valve controls the pipeline, only one valve of each pair of electric valves is ensured to act in order to protect the safety of pipeline feeding. By implementing the electric valve linkage function for the PLC300, at most one of the PLC is opened at each pair of times. When the remote operation is carried out by the WinCC, the button of the control switch can not be operated repeatedly before the electric valve has no feedback state.
WinCC displays the states of the three valves, and when the operation authority of the valves is not opened, the operation buttons of the valves are controlled not to be displayed; when the valve operation authority is received, the control valve operation button appears, and after the authority time is 30s, the control valve operation button disappears. After the valve operation button of the electric valve is operated and before the feedback state is received, the valve operation button is not operable, and after the feedback state is received, the valve operation button can be operated.
Secondly, the operation authority control is realized by card swiping of a card reader and double authority protection of WinCC interface design, so that the safety and reliability of remote operation of the valve are improved;
thirdly, the communication method based on the OPC technology can complete data interaction with a valve controller and a card reader at the same time, and data interaction is realized through OPC variables and WinCC, so that the number of communication software is reduced, and the operation efficiency of the monitoring system is improved; meanwhile, the data is converted into an OPC standard data format and uploaded to an OPC server, so that the data can be conveniently shared with other clients.
The communication software receives a command of WinCC from the valve controller, analyzes the data and then sends the data to the valve controller in a serial port data format, the valve controller performs corresponding remote operation or valve state parameter transmission after receiving the command, the communication software analyzes and converts the fed-back data into corresponding OPC variable data after receiving the feedback from the valve controller, and the data is transmitted to the WinCC through an OPC interface to be displayed. And the communication software establishes an OPC variable of the valve authority for judging whether the valve authority is opened or not. When the card reader identifies an authorized card, the communication software opens the valve authority variable, the valve authority variable is transmitted to WinCC in an OPC mode, the operational authority of the valve is opened on a WinCC interface, the authority time is 30s, when the authority time is up, the operational authority of the valve on the WinCC interface is closed, the operational authority of the valve is fed back to the communication software, and the valve authority variable of the communication software is closed.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (5)

1. The utility model provides an equipment monitoring system with valve remote control safety protection function which characterized in that: comprises an upper computer (1), and a card reader (2), a Siemens PLC300 (3) and a valve controller (4) which are respectively and electrically connected with the upper computer;
the card reader (2) identifies an authorization card and judges whether a valve is opened to control authorization;
the Siemens PLC300 (3) is respectively connected with the electric valves (6) and the electromagnetic pneumatic valves (7), and is used for acquiring parameters of all the electric valves (6) and the electromagnetic pneumatic valves (7) and controlling the parameters to realize actions;
the valve controller (4) is connected with the electric regulating valve (5), collects parameters of the electric regulating valve and controls the electric regulating valve to realize actions;
the electric regulating valve (5), the electric valve (6) and the electromagnetic pneumatic valve (7) are used for controlling a pipeline;
the card reader (2) is connected with the upper computer (1) through the Ethernet, and the communication protocol of the card reader is a UDP (user Datagram protocol) communication protocol;
the card reader (2) transmits the authorization information to monitoring software WinCC carried by the upper computer (1) for processing through a communication method based on OPC technology;
the valve remote control safety protection method of the equipment monitoring system comprises the following steps:
control of the operating limits
Starting;
(ii) determining whether the valve authority variable is activated, and if so, entering step (iii); if not activated, entering step (xi);
(iii) starting timing when the activation time of the valve authority variable is 30 s;
(iv) the valve authority variable is activated, and a WinCC interface of the upper computer remotely operates a valve button;
(v) judging whether the valve state is in place, if so, entering the step (vi); if not, entering step (vii);
(vi) turning on the button to the inoperable state and turning off the button to the operable state, and entering into step (viii);
(vii) opening the button in an operable state and closing the button in an inoperable state, entering step (viii);
(viii) determining whether the activation time of the valve permission variable reaches 30s, if so, entering step (ix); otherwise, returning to the step (iv), and remotely operating the valve button to keep the appearance state;
(ix) disappearance of the remotely operated valve button;
(x) the valve authority variable reverts to the inactive state;
(xi) Reading the Siemens PLC300 data, and acquiring the states of the electric valve and the electromagnetic pneumatic valve;
(xii) Reading data of a valve controller, and acquiring the opening and closing state and opening parameters of the electric regulating valve;
(xiii) Finishing;
the valve authority variable is obtained by reading a card number through a card reader;
(II) linkage control of electric valve
Starting;
(ii) initializing a program to ensure that a relay for controlling the electric valve is in a release state;
(iii) receiving a command for opening the No. I electric valve;
(iv) judging whether the No. I electric valve is opened or not, and if so, entering the step (v); if not, entering the step (vi);
(v) keeping the No. I electric valve not in operation, namely keeping the current state;
(vi) judging whether the No. II electric valve linked with the No. I is in an opened state, if so, entering the step (v); if the electric valve II is not opened, the step (vii) is carried out;
(vii) opening the motorized valve # I;
(viii) judging whether the electric valve I returns to the start position state, if yes, entering the step (ix); if not, returning to the step (viii) for cycle judgment;
(ix) releasing the relay, closing the motor of the # I electric valve;
(x) is over.
2. The equipment monitoring system with the valve remote control safety protection function according to claim 1, characterized in that: the upper computer (1) adopts a PC (personal computer) or an industrial personal computer; and the upper computer (1) is provided with upper computer monitoring software WinCC and communication software based on OPC technology.
3. The equipment monitoring system with the valve remote control safety protection function according to claim 1, characterized in that: the communication protocol of the valve controller (4) is RS232 communication protocol.
4. The equipment monitoring system with the valve remote control safety protection function according to claim 1, characterized in that: the communication method based on the OPC technology is used for realizing the communication with a valve controller and the communication with a card reader to finish the valve card swiping authorization function, and specifically comprises the following steps;
reading a configuration file, wherein the configuration file comprises serial port configuration of a valve controller RS232 and UDP configuration of a card reader;
(ii) judging whether the OPC registers the service, if so, entering the step (iv); entering step (iii) if the service is not registered;
(iii) registering an OPC service, and entering step (iv);
(iv) starting OPC service:
uploading the opening and closing state and the opening parameter of the electric regulating valve and the opening and closing state of the valve authority variable to WinCC in real time.
5. The equipment monitoring system with the valve remote control safety protection function according to claim 4, characterized in that: said step (iv) of opening the OPC service comprises:
(a) Communicating with a valve controller
Reading a remote control command from WinCC, analyzing data, sending the analyzed data to a valve controller in a serial port data format, receiving feedback from the valve controller, analyzing and converting the fed-back data into corresponding OPC variable data, and transmitting the data to WinCC through an OPC interface for display processing;
(b) Communicating with a card reader
Reading card number information of the card reader, establishing an OPC variable of the valve authority, judging whether the valve authority is opened or not, transmitting the OPC variable of the valve authority to WinCC, and switching the operable authority of the valve on an interface.
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