Redundant IO module and redundant connecting device based on DCS

Abstract

The invention discloses a redundancy IO module and a redundancy connecting device based on a DCS, the redundancy IO module comprises a redundancy IO base and two or three IO cards, and the redundancy IO base comprises three IO card slots, a dial-up device, an Ethernet port and a terminal device; one end of each IO card slot is connected with the same end of the terminal device, the other end of the terminal device is connected with an external sensor, and the dial-up device is used for determining an IP address corresponding to the IO card; each IO card is respectively inserted into different IO card slots, and each IO card is respectively provided with two Ethernet ports to communicate with the DCS controller. The three IO card slots are formed in the same redundant IO base, and the IP address corresponding to each IO card is determined by the dial-up device, so that the IO cards realize Ethernet communication with the DCS controller through the Ethernet port based on the Ethernet IP addresses, triple-redundancy or dual-redundancy redundancy control is realized, and the fault tolerance of the DCS system is improved.

Description

Technical Field

[0001] The present invention relates to the field of redundant control technology, and in particular to an IO redundant module and a redundant connection device based on a DCS. Background Art

[0002] In the field of industrial control, the IO module is the executor of signal acquisition or action output in the entire industrial control system, and a large number of IO modules are used in the DCS system (Distributed Control System).

[0003] Most of the IO modules of the DCS system are single-module input signals or single-module output signals. When an input single IO module fails, it will cause the sensor signal to fail in the process of being input into the DCS system, or the sensor input signal will be incorrectly received by the DCS; when an output single IO module fails, it may cause the output signal of the DCS system to fail in the process of being sent to the actuator or instrument, or the DCS output signal may be incorrectly received by the actuator or instrument.

[0004] At present, once a single IO module fails in a DCS system, the sensor signal input to the DCS system or the DCS system output signal to the actuator or instrument fails, causing the fault tolerance of the DCS system to decrease. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defect in the prior art that when a single IO module in a DCS system fails, the sensor signal input to the DCS system or the DCS system output signal to the actuator or instrument fails, resulting in a decrease in the fault tolerance of the DCS system, and to provide a redundant IO module and a redundant connection device based on DCS.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] In a first aspect, the present invention provides a redundant IO module based on DCS, the redundant IO module comprising: a redundant IO base and two or three IO cards, the redundant IO base comprising three IO card slots, a dial device, an Ethernet port and a terminal device;

[0008] One end of the IO card slot is connected to the same end of the terminal device, the other end of the terminal device is connected to an external sensor, and the dial device is used to determine the IP address corresponding to the IO card;

[0009] Each of the IO cards is inserted into a different IO card slot, and each of the IO cards is configured with two Ethernet ports to perform Ethernet communication with a DCS controller.

[0010] Preferably, the redundant IO module further includes a controller, the dial device includes a first dial device, a second dial device and a third dial device, and the IO card includes a first IO card, a second IO card and a third IO card;

[0011] The first dialing device is used to determine the first IP address corresponding to the first IO card;

[0012] The second dialing device is used to determine the second IP address corresponding to the second IO card;

[0013] The third dial device is used to determine the third IP address corresponding to the third IO card;

[0014] The controller is used to obtain the first IP address, the second IP address and the third IP address.

[0015] Preferably, the IO card slot has a unique position identifier;

[0016] The controller is further configured to obtain slot position information of the IO card when the IO card is inserted into the redundant IO base according to the position identifier.

[0017] Preferably, the IO card comprises at least one of a temperature input card, an analog quantity input card, a digital quantity input card, an analog quantity output card and a digital quantity output card.

[0018] In a second aspect, the present invention provides a redundant connection device, comprising: a first switch, a second switch, and a redundant IO module based on DCS as described in the first aspect;

[0019] The DCS-based redundant IO module communicates with the DCS controller through the first switch and the second switch, and the redundant connection device obtains several redundant modes according to different matching of IO cards in the DCS-based redundant IO module;

[0020] The redundant mode includes at least one of a triple redundant input mode, a triple redundant output mode, a single triple mode, a dual redundant input mode and a dual redundant output mode.

[0021] Preferably, when the IO card in the DCS-based redundant IO module is three input cards, the first input card is inserted into the first IO card slot of the redundant IO base, the second input card is inserted into the second IO card slot of the redundant IO base, and the third input card is inserted into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the three-redundant input mode;

[0022] In the case of the triple-redundant input mode, the first Ethernet port configured by the first input card is connected to the first switch, the second Ethernet port configured by the second input card is connected to the second switch, the first Ethernet port configured by the third input card is connected to the first switch, and the second Ethernet port configured by the third input card is connected to the second switch;

[0023] or,

[0024] In the case of the triple-redundant input mode, the second Ethernet port configured by the first input card is connected to the second switch, the first Ethernet port configured by the second input card is connected to the first switch, the first Ethernet port configured by the third input card is connected to the first switch, and the second Ethernet port configured by the third input card is connected to the second switch;

[0025] The first input card and the second input card occupy a first pair of IP addresses, and the third input card occupies a second pair of IP addresses.

[0026] Preferably, when the IO card in the DCS-based redundant IO module is three output cards, the first output card is inserted into the first IO card slot of the redundant IO base, the second output card is inserted into the second IO card slot of the redundant IO base, and the third output card is inserted into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the triple redundant output mode;

[0027] In the case of the triple-redundant output mode, the first Ethernet port configured by the first output card is connected to the first switch, the second Ethernet port configured by the second output card is connected to the second switch, the first Ethernet port configured by the third output card is connected to the first switch, and the second Ethernet port configured by the third output card is connected to the second switch;

[0028] or,

[0029] In the case of the triple-redundant output mode, the second Ethernet port configured by the first output card is connected to the second switch, the first Ethernet port configured by the second output card is connected to the first switch, the first Ethernet port configured by the third output card is connected to the first switch, and the second Ethernet port configured by the third output card is connected to the second switch;

[0030] The first output card and the second output card occupy a third pair of IP addresses in total, and the third output card occupies a fourth pair of IP addresses.

[0031] Preferably, when the IO card in the DCS-based redundant IO module is an input card or an output card, the first input card or the first output card is inserted into the first IO card slot of the redundant IO base, the second input card or the second output card is inserted into the second IO card slot of the redundant IO base, the third input card or the third output card is input into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the single-three mode;

[0032] In the case of the single-three mode, the first Ethernet port configured by the first input card or the first output card is connected to the first switch, and the second Ethernet port configured by the first input card or the first output card is connected to the second switch; the first Ethernet port configured by the second input card or the second output card is connected to the first switch, and the second Ethernet port configured by the second input card or the second output card is connected to the second switch; the first Ethernet port configured by the third input card or the third output card is connected to the first switch, and the second Ethernet port configured by the third input card or the third output card is connected to the second switch.

[0033] Preferably, when the IO card in the DCS-based redundant IO module is an input card, the first input card is inserted into the first IO card slot of the redundant IO base, the second input card is inserted into the second IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the dual redundant input mode;

[0034] In the dual redundant input mode, the first Ethernet port configured in the first input card is connected to the first switch, and the second Ethernet port configured in the second input card is connected to the second switch; the first input card and the second input card occupy a total of the fifth pair of IP addresses.

[0035] Preferably, when the IO card in the DCS-based redundant IO module is an output card, the first output card is inserted into the first IO card slot of the redundant IO base, the second output card is inserted into the second IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the dual redundant output mode;

[0036] In the dual redundant output mode, the first Ethernet port configured by the first output card is connected to the first switch, and the second Ethernet port configured by the second output card is connected to the second switch; the first output card and the second output card occupy a total of the sixth pair of IP addresses.

[0037] The positive and progressive effect of the present invention is that the present invention discloses a redundant IO module and a redundant connection device based on DCS, the redundant IO module includes a redundant IO base and two or three IO cards, the redundant IO base includes three IO card slots, a dial device, an Ethernet port and a terminal device; one end of the IO card slot is connected to the same end of the terminal device, the other end of the terminal device is connected to an external sensor, and the dial device is used to determine the IP address corresponding to the IO card; each IO card is inserted into a different IO card slot, and each IO card is configured with two Ethernet ports to communicate with the DCS controller through Ethernet. The present invention sets three IO card slots through the same redundant IO base, and uses the dial device to determine the IP address corresponding to each IO card, so that the IO card realizes Ethernet communication with the DCS controller through the Ethernet port based on the Ethernet IP address, realizes triple-redundant or dual-redundant redundant control, and improves the fault tolerance of the DCS system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the structure of a DCS-based redundant IO module in Example 1.

[0039] Figure 2 This is a first structural schematic diagram of the redundant connection device of Example 2.

[0040] Figure 3 This is a second structural schematic diagram of the redundant connection device of Example 2.

[0041] Figure 4 This is a third structural schematic diagram of the redundant connection device of Example 2.

[0042] Figure 5 This is a fourth structural schematic diagram of the redundant connection device of Example 2.

[0043] Figure 6 This is a fifth structural schematic diagram of the redundant connection device of Example 2. DETAILED DESCRIPTION

[0044] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0045] Example 1

[0046] This embodiment provides a redundant IO module based on DCS, such as Figure 1 As shown, the redundant IO module includes: a redundant IO base 10 and two or three IO cards 20, the redundant IO base includes three IO card slots 11, a dial device 12, an Ethernet port (not shown in the figure) and a terminal device 13;

[0047] One end of the IO card 20 slot is connected to the same end of the terminal device 13, and the other end of the terminal device 13 is connected to the external sensor. The dial device 12 is used to determine the IP address corresponding to the IO card;

[0048] Each IO card 20 is inserted into a different IO card slot 11 , and each IO card 20 is configured with two Ethernet ports to perform Ethernet communication with the DCS controller.

[0049] The IO card 20 includes at least one of a temperature input card, an analog quantity input card, a digital quantity input card, an analog quantity output card and a digital quantity output card.

[0050] In this embodiment, the redundant IO base 10 of the redundant IO module can have a terminal device 13, three pairs of Ethernet ports, three IO card slots 11 and three dial devices 12. The IO card 20 can collect a variety of different types of analog (current, voltage and temperature) signals and digital signals, and can also output a variety of different types of analog (current, voltage and temperature) signals and digital signals. The temperature input card is used to collect temperature signals, the analog input card is used to collect current signals or voltage signals; the digital input card is used to collect digital signals; the analog output card is used to output current signals or voltage signals; the digital output signal is used to output digital signals. The IO card has dual Ethernet communication, and Ethernet communication with the DCS controller is realized through the IP address of the IO card Ethernet and by configuring any one of the two Ethernet ports.

[0051] The redundant IO module has dual Ethernet communication capabilities. On the one hand, it can convert the collected input signals of external sensors into Ethernet data and then transmit them to the DCS controller. On the other hand, the redundant IO module can convert the DCS controller input data and output it to the external sensor (for example, actuator), realizing the mutual compatibility of multi-redundancy and non-redundancy and expanding the flexibility of data transmission.

[0052] In one embodiment, the redundant IO module further includes a controller (not shown in the figure), the dial device 12 includes a first dial device, a second dial device and a third dial device, and the IO card includes a first IO card, a second IO card and a third IO card;

[0053] The first dial device is used to determine the first IP address corresponding to the first IO card;

[0054] The second dial device is used to determine the second IP address corresponding to the second IO card;

[0055] The third dial device is used to determine the third IP address corresponding to the third IO card;

[0056] The controller is used to obtain a first IP address, a second IP address, and a third IP address.

[0057] In one embodiment, the IO card slot 11 has a unique position identifier;

[0058] The controller is further used to obtain slot position information when the IO card 20 is inserted into the redundant IO base 10 according to the position identifier.

[0059] In this embodiment, the three IO card slots 11 of the redundant IO base 10 are provided with three position identifiers, which enable the controller to identify the slot position of the IO card 20 inserted into the redundant IO base 10. The controller can also obtain the IP address corresponding to each dial device 12, so that the IO card can realize Ethernet communication.

[0060] In this embodiment, three IO card slots are set through the same redundant IO base, and the IP address corresponding to each IO card is determined by using a dial device, so that the IO cards of the same IO redundant base can communicate with the DCS controller through the Ethernet port based on the Ethernet IP address, thereby realizing triple redundancy, dual redundancy and non-redundancy redundant control, and improving the fault tolerance of the DCS system.

[0061] Example 2

[0062] This embodiment provides a redundant connection device, such as Figure 2 As shown, it includes: a first switch 110, a second switch 120 and a DCS-based redundant IO module 100 in Embodiment 1;

[0063] The DCS-based redundant IO module 100 communicates with the DCS controller through the first switch 110 and the second switch 120, and the redundant connection device obtains several redundant modes according to different matching of IO cards in the DCS-based redundant IO module 100;

[0064] Among them, the redundant mode includes at least one of a triple redundant input mode, a triple redundant output mode, a single triple mode, a dual redundant input mode and a dual redundant output mode.

[0065] One end of the redundant connection device is connected to the DCS controller, and the other end of the redundant connection device is connected to the external sensor. When the IO card is an input card, the data transmission direction in the Ethernet communication process is from the external sensor to the terminal device, and then transmitted to the DCS controller through the IO module, the Ethernet port, and the switch; when the IO card is an output card, the data transmission direction in the Ethernet communication process is from the DCS controller to the switch, and then transmitted to the external sensor through the Ethernet port, the IO module, and the terminal device.

[0066] In this embodiment, the single-triple mode realizes a non-redundant mode based on Ethernet communication between the DCS-based redundant IO module and the switch; the dual redundant output mode and the dual redundant input mode realize that when a single card fails, the Ethernet communication between the IO module and the DCS controller is not affected; the triple redundant output module and the triple redundant input mode realize that when two cards fail, the Ethernet communication between the IO module and the DCS controller is not affected.

[0067] In one embodiment, when the IO card in the DCS-based redundant IO module is three input cards, the first input card is inserted into the first IO card slot of the redundant IO base, the second input card is inserted into the second IO card slot of the redundant IO base, and the third input card is inserted into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is a triple redundant input mode;

[0068] In the case of triple redundant input mode, such as Figure 3 As shown, the first Ethernet port configured by the first input card (the figure shows the port A connected to the first input card) is connected to the first switch, the second Ethernet port configured by the second input card (the figure shows the port B connected to the second input card) is connected to the second switch, the first Ethernet port configured by the third input card (the figure shows the port A connected to the third input card) is connected to the first switch, and the second Ethernet port configured by the third input card (the figure shows the port B connected to the third input card) is connected to the second switch;

[0069] or,

[0070] In the case of triple redundant input mode, the second Ethernet port configured by the first input card is connected to the second switch, the first Ethernet port configured by the second input card is connected to the first switch, the first Ethernet port configured by the third input card is connected to the first switch, and the second Ethernet port configured by the third input card is connected to the second switch;

[0071] The first input card and the second input card jointly occupy a first pair of IP addresses, and the third input card occupies a second pair of IP addresses.

[0072] In this embodiment, the three input cards are redundant with each other, and the three input cards occupy 2 pairs of IP addresses. The three dial devices on the redundant IO base are dialed into three completely identical even addresses. The A network address corresponding to the first Ethernet port configured by the third input card is obtained from the IP address read by the third dial device + 1; the B network address configured by the third input card is obtained from the IP address read by the third dial device + 1 to ensure that the third group of addresses in the B network address is different from the third group of addresses in the A network address. The third group of addresses of the two IP addresses in the first pair of IP addresses are different from the other addresses, and the third group of addresses of the two IP addresses in the second pair of IP addresses are different from the other addresses, and are not repeated with the two IPs in the first pair of IP addresses.

[0073] Exemplarily, in the triple redundant input mode, first set the address of the redundant IO base dial device to 2; the network port 1A corresponding to the 1st card slot is connected to the A switch through a network cable; the network port 2B corresponding to the 2nd card slot is connected to the B switch through a network cable; the network port 3A corresponding to the 3rd card slot is connected to the A switch through a network cable, and the network port 3B corresponding to the 3rd card slot is connected to the B switch through a network cable.

[0074] The 1st card slot is inserted into the A input card, the 2nd card slot is inserted into the B input card, and the 3rd card slot is inserted into the C input card.

[0075] A input card reads the first dial device to obtain the A network address of 192.168.101.2;

[0076] B inputs the card to read the second dial device to obtain the B network address 192.168.102.2;

[0077] C inputs the card to read the third dial device to obtain the A network address and add 1 to it, which is 192.168.101.3.

[0078] C inputs the card to read the third dial device to obtain the B network address 192.168.102.3.

[0079] In one embodiment, when the IO card in the DCS-based redundant IO module is three output cards, the first output card is inserted into the first IO card slot of the redundant IO base, the second output card is inserted into the second IO card slot of the redundant IO base, and the third output card is inserted into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is a triple redundant output mode;

[0080] In the case of triple redundant output mode, the first Ethernet port configured by the first output card is connected to the first switch, the second Ethernet port configured by the second output card is connected to the second switch, the first Ethernet port configured by the third output card is connected to the first switch, and the second Ethernet port configured by the third output card is connected to the second switch;

[0081] or,

[0082] In the case of triple redundant output mode, such as Figure 4 As shown, the second Ethernet port configured by the first output card (the figure shows the B port connected to the first output card) is connected to the second switch, the first Ethernet port configured by the second output card (the figure shows the A port connected to the second output card) is connected to the first switch, the first Ethernet port configured by the third output card (the figure shows the A port connected to the third output card) is connected to the first switch, and the second Ethernet port configured by the third output card (the figure shows the B port connected to the third output card) is connected to the second switch;

[0083] The first output card and the second output card occupy a third pair of IP addresses in total, and the third output card occupies a fourth pair of IP addresses.

[0084] In this embodiment, the three output cards are mutually redundant, and the three output cards occupy two pairs of IP addresses. The three dial devices on the redundant IO base are dialed into three completely identical even addresses, and the A network address configured by the third output card is obtained by reading the IP address + 1 from the third dial device; the B network address configured by the third output card is obtained by reading the IP address + 1 from the third dial device; so as to ensure that the third group of addresses of the B network address is different from the third group of addresses in the A network address.

[0085] In one embodiment, when the IO card in the DCS-based redundant IO module is an input card or an output card, the first input card or the first output card is inserted into the first IO card slot of the redundant IO base, the second input card or the second output card is inserted into the second IO card slot of the redundant IO base, the third input card or the third output card is input into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is a single-three mode;

[0086] In the single-three mode, the first Ethernet port configured by the first input card or the first output card is connected to the first switch, and the second Ethernet port configured by the first input card or the first output card is connected to the second switch; the first Ethernet port configured by the second input card or the second output card is connected to the first switch, and the second Ethernet port configured by the second input card or the second output card is connected to the second switch; the first Ethernet port configured by the third input card or the third output card is connected to the first switch, and the second Ethernet port configured by the third input card or the third output card is connected to the second switch.

[0087] In this embodiment, the single-three mode is a non-redundant mode for the three IO cards. The three IO cards occupy a pair of IP addresses. The three dial addresses set on the redundant IO base are set to the same. The single-three mode realizes a non-redundant mode for Ethernet communication between the IO module and the DCS controller, expands the redundancy mode, and improves the application scope of the redundant connection device.

[0088] The three dial devices on the redundant IO base are dialed into three identical and odd addresses. The A network address corresponding to the first Ethernet port configured by the second input or output card is obtained by reading the IP address + 1 from the third dial device; the B network address corresponding to the second Ethernet port configured by the second input or output card is obtained by reading the IP address + 1 from the second dial device, and it is ensured that the A network address is different from the second group of addresses in the B network address. The A network address of the third input or output card is read from the third dial device and added 2; the B network address of the third input or output card is read from the third dial device and added 2, and it is ensured that the third group of addresses of the B network address is different from the third group of addresses of the A network address.

[0089] Exemplarily, in the single-three mode: first set the address of the redundant IO base dial device to 1; the network port 1A corresponding to the first card slot is connected to the switch A through a network cable, and the network port 1B is connected to the switch B through a network cable; the network port 2A corresponding to the second card slot is connected to the switch A through a network cable, and the network port 2B is connected to the switch B through a network cable; the network port 3A corresponding to the third card slot is connected to the switch A through a network cable, and the network port 3B is connected to the switch B through a network cable.

[0090] Insert the A input card into the first card slot, insert the B input card into the second card slot, and insert the C input card into the third card slot. The A input card reads the first dial device to obtain the A network address of 192.168.101.1, and the A input card reads the first dial device to obtain the B network address of 192.168.102.1; the B input card reads the second dial device to obtain the A network address + 1 of 192.168.101.2, and the B input card reads the second dial device to obtain the B network address + 1 of 192.168.102.2; the C input card reads the third dial device to obtain the A network address + 2 of 192.168.101.3, and the C input card reads the third dial device to obtain the B network address + 2 of 192.168.102.3.

[0091] In one embodiment, when the IO card in the DCS-based redundant IO module is an input card, the first input card is inserted into the first IO card slot of the redundant IO base, the second input card is inserted into the second IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is a dual redundant input mode;

[0092] In case of dual redundant input mode, such as Figure 5As shown, the first Ethernet port configured by the first input card (port A connected to the first input card is shown in the figure) is connected to the first switch, and the second Ethernet port configured by the second input card (port B connected to the second input card is shown in the figure) is connected to the second switch; the first input card and the second input card occupy a total of the fifth pair of IP addresses.

[0093] In this embodiment, the three input cards are redundant with each other, two input cards occupy one pair of IP addresses, and the dial devices corresponding to the two IO cards on the redundant IO base are dialed into two completely identical addresses.

[0094] In one embodiment, when the IO card in the DCS-based redundant IO module is an output card, the first output card is inserted into the first IO card slot of the redundant IO base, and the second output card is inserted into the second IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is a dual redundant output mode;

[0095] In case of dual redundant output mode, such as Figure 6 As shown, the first Ethernet port configured by the first output card (port A connected to the first output card is shown in the figure) is connected to the first switch, and the second Ethernet port configured by the second output card (port B connected to the second output card is shown in the figure) is connected to the second switch; the first output card and the second output card occupy a total of the sixth pair of IP addresses.

[0096] In this embodiment, the three output cards are redundant with each other, two output cards occupy one pair of IP addresses, and the dial devices corresponding to the two IO cards on the redundant IO base are dialed into two completely identical addresses.

[0097] In this embodiment, a DCS-based redundant IO module that supports dual redundant mode, triple redundant mode and single-three non-redundant mode is physically connected to the first switch and the second switch, and then a dial device is used to determine the IP address corresponding to each IO card, thereby realizing triple redundant, dual redundant and single-three mode redundant control of Ethernet communication, improving the fault tolerance of the DCS system and enhancing the redundancy reliability.

[0098] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A redundant IO module based on DCS, characterized in that: The redundant IO module includes: a redundant IO base and two or three IO cards, wherein the redundant IO base includes three IO card slots, a dial device, an Ethernet port and a terminal device; One end of the IO card slot is connected to the same end of the terminal device, the other end of the terminal device is connected to an external sensor, and the dial device is used to determine the IP address corresponding to the IO card; Each of the IO cards is inserted into a different IO card slot, and each of the IO cards is configured with two Ethernet ports to perform Ethernet communication with a DCS controller.

2. The DCS-based redundant IO module according to claim 1, characterized in that: The redundant IO module further includes a controller, the dial device includes a first dial device, a second dial device and a third dial device, and the IO card includes a first IO card, a second IO card and a third IO card; The first dialing device is used to determine the first IP address corresponding to the first IO card; The second dial device is used to determine the second IP address corresponding to the second IO card; The third dial device is used to determine the third IP address corresponding to the third IO card; The controller is used to obtain the first IP address, the second IP address and the third IP address.

3. The DCS-based redundant IO module according to claim 2, characterized in that: The IO card slot has a unique position identifier; The controller is further configured to obtain slot position information of the IO card when the IO card is inserted into the redundant IO base according to the position identifier.

4. The DCS-based redundant IO module according to claim 2, characterized in that: The IO card comprises at least one of a temperature input card, an analog quantity input card, a digital quantity input card, an analog quantity output card and a digital quantity output card.

5. A redundant connection device, characterized in that: include: A first switch, a second switch, and a DCS-based redundant IO module as described in any one of claims 1 to 4; The DCS-based redundant IO module communicates with the DCS controller through the first switch and the second switch, and the redundant connection device obtains several redundant modes according to different matching of IO cards in the DCS-based redundant IO module; The redundant mode includes at least one of a triple redundant input mode, a triple redundant output mode, a single triple mode, a dual redundant input mode and a dual redundant output mode.

6. The redundant connection device according to claim 5, characterized in that: When the IO card in the DCS-based redundant IO module is three input cards, the first input card is inserted into the first IO card slot of the redundant IO base, the second input card is inserted into the second IO card slot of the redundant IO base, and the third input card is inserted into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the three-redundant input mode; In the case of the triple-redundant input mode, the first Ethernet port configured by the first input card is connected to the first switch, the second Ethernet port configured by the second input card is connected to the second switch, the first Ethernet port configured by the third input card is connected to the first switch, and the second Ethernet port configured by the third input card is connected to the second switch; or, In the case of the triple-redundant input mode, the second Ethernet port configured by the first input card is connected to the second switch, the first Ethernet port configured by the second input card is connected to the first switch, the first Ethernet port configured by the third input card is connected to the first switch, and the second Ethernet port configured by the third input card is connected to the second switch; The first input card and the second input card occupy a first pair of IP addresses, and the third input card occupies a second pair of IP addresses.

7. The redundant connection device according to claim 5, characterized in that: When the IO card in the DCS-based redundant IO module is three output cards, the first output card is inserted into the first IO card slot of the redundant IO base, the second output card is inserted into the second IO card slot of the redundant IO base, and the third output card is inserted into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the triple redundant output mode; In the case of the triple-redundant output mode, the first Ethernet port configured by the first output card is connected to the first switch, the second Ethernet port configured by the second output card is connected to the second switch, the first Ethernet port configured by the third output card is connected to the first switch, and the second Ethernet port configured by the third output card is connected to the second switch; or, In the case of the triple-redundant output mode, the second Ethernet port configured by the first output card is connected to the second switch, the first Ethernet port configured by the second output card is connected to the first switch, the first Ethernet port configured by the third output card is connected to the first switch, and the second Ethernet port configured by the third output card is connected to the second switch; The first output card and the second output card occupy a third pair of IP addresses in total, and the third output card occupies a fourth pair of IP addresses.

8. The redundant connection device according to claim 5, characterized in that: When the IO card in the DCS-based redundant IO module is an input card or an output card, the first input card or the first output card is inserted into the first IO card slot of the redundant IO base, the second input card or the second output card is inserted into the second IO card slot of the redundant IO base, the third input card or the third output card is input into the third IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the single-three mode; In the case of the single-three mode, the first Ethernet port configured by the first input card or the first output card is connected to the first switch, and the second Ethernet port configured by the first input card or the first output card is connected to the second switch; the first Ethernet port configured by the second input card or the second output card is connected to the first switch, and the second Ethernet port configured by the second input card or the second output card is connected to the second switch; the first Ethernet port configured by the third input card or the third output card is connected to the first switch, and the second Ethernet port configured by the third input card or the third output card is connected to the second switch.

9. The redundant connection device according to claim 5, characterized in that: When the IO card in the DCS-based redundant IO module is an input card, the first input card is inserted into the first IO card slot of the redundant IO base, the second input card is inserted into the second IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the dual redundant input mode; In the dual redundant input mode, the first Ethernet port configured in the first input card is connected to the first switch, and the second Ethernet port configured in the second input card is connected to the second switch; the first input card and the second input card occupy a total of the fifth pair of IP addresses.

10. The redundant connection device according to claim 5, characterized in that: When the IO card in the DCS-based redundant IO module is an output card, the first output card is inserted into the first IO card slot of the redundant IO base, the second output card is inserted into the second IO card slot of the redundant IO base, and the redundant mode of the redundant connection device is the dual redundant output mode; In the dual redundant output mode, the first Ethernet port configured by the first output card is connected to the first switch, and the second Ethernet port configured by the second output card is connected to the second switch; the first output card and the second output card occupy a total of the sixth pair of IP addresses.

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