Modular PLC redundant power supply system integrated with program responsive intelligent UPS

Abstract

The application discloses a kind of integrated program response intelligent UPS's modular PLC redundant power supply system, it is related to high reliability power supply technical field, the application includes intelligent power supply module, intelligent power supply module is by main input and power conversion unit, embedded energy storage unit, programmable multi-output unit and collaborative intelligent control unit Composition, main input and power conversion unit are used to access a way external main power supply, and it is converted into the form of electric energy required by system, embedded energy storage unit is used to constitute built-in backup energy source, programmable multi-output unit is used to provide independent controllable DC power output for several ways, collaborative intelligent control unit is used to obtain program state instruction and global power supply state information, work mode decision is carried out, create program definition type emergency power supply new paradigm, improve the emergency endurance of PLC power supply system, reduce the life cycle cost and energy efficiency of PLC power supply system, guarantee the high reliability of PLC power supply.

Description

Technical Field

[0001] This invention relates to the field of high-reliability power supply technology, specifically to a modular PLC redundant power supply system with integrated program-responsive intelligent UPS. Background Technology

[0002] PLCs are the core control units for industrial automation and intelligent manufacturing. They are widely used in key scenarios such as production line control, equipment linkage, and process adjustment. The continuity and stability of their power supply are directly related to production efficiency, equipment safety, and personnel safety.

[0003] Existing technical solutions are mainly divided into two categories: one is to use ordinary redundant power supply modules, which only realize the backup of the input level. Once the external power supply is completely interrupted, the system will stop immediately; the other is to connect an independent UPS device to the entire PLC system. Obviously, the existing technology has at least the following shortcomings: 1. The existing technology lacks backup energy storage, is costly and has a crude power supply management. The external UPS cannot sense the operating status of the PLC's internal application. When powered by battery, it can only provide indiscriminate power supply to all loads, which may result in the backup energy being consumed by non-critical tasks and cannot effectively extend the running time of the core control functions.

[0004] 2. Existing technologies are blind to the operational intent of applications, resulting in a disconnect between power supply security and business logic. In traditional modular redundant architectures, there is a lack of information interaction and intelligent collaboration between power modules. They can only achieve simple current sharing or master-slave switching. There are fundamental defects such as gaps in program collaboration and coarse granularity of energy management. It is impossible to perform globally optimized energy scheduling and allocation based on the overall power supply status of the system and the real-time needs of the application. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the present invention aims to provide a modular PLC redundant power supply system with integrated program-responsive intelligent UPS.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a modular PLC redundant power supply system with integrated program-responsive intelligent UPS, including: intelligent power supply module.

[0007] The intelligent power supply module includes a main input and power conversion unit, an embedded energy storage unit, a programmable multiple output unit, and a collaborative intelligent control unit.

[0008] The main input and power conversion unit is used to connect to an external main power supply and convert it into the form of electrical energy required by the system.

[0009] The embedded energy storage unit is used to form a built-in backup energy source through a rechargeable battery and various battery management circuits.

[0010] The programmable multiplexer unit is used to provide independent and controllable DC power output for several channels.

[0011] The collaborative intelligent control unit is used to acquire program status instructions and global power supply status information to make working mode decisions.

[0012] The beneficial effects of this invention are as follows: 1. This invention provides a modular PLC redundant power supply system with integrated program-responsive intelligent UPS. Its intelligent power supply module consists of a main input and power conversion unit, an embedded energy storage unit, a programmable multi-output unit, and a collaborative intelligent control unit. The main input and power conversion unit is used to connect to an external main power supply and convert it into the form of electrical energy required by the system. The embedded energy storage unit is used to form a built-in backup energy source. The programmable multi-output unit is used to provide independent and controllable DC power output for several channels. The collaborative intelligent control unit is used to obtain program status instructions and global power supply status information, and make working mode decisions. This creates a new paradigm of program-defined emergency power supply, improves the emergency endurance capability of the PLC power supply system, reduces the life cycle cost and energy efficiency of the PLC power supply system, and ensures the high reliability of the PLC power supply.

[0013] 2. This invention implements a full protection strategy when the program status instruction type is critical motion control, an energy-saving maintenance strategy when the program status instruction type is low-power standby, an ultra-low power strategy when the program status instruction type is ultra-low power maintenance, and a safety priority strategy when the program status instruction type is emergency safety stop. The full protection strategy maintains the full output of each channel in the programmable multiplexer unit. The energy-saving maintenance strategy adjusts the output voltage of Buck circuit 1 in the programmable multiplexer unit to 4.8V, shuts down the output of the Boost circuit, and maintains the full output of Buck circuits 2, 3, and 4. The ultra-low power strategy shuts down the outputs of Buck circuits 1, 4, and the Boost circuit in the programmable multiplexer unit, maintaining the minimum output of Buck circuits 2 and 3. The safety priority strategy shuts down the outputs of Buck circuits 1, 2, 3, and 4 in the programmable multiplexer unit, maintaining only the output of the Boost circuit. This invention pioneers a new paradigm of program-defined emergency power supply, improves the emergency endurance capability of the PLC power supply system, and ensures the high reliability of the PLC power supply.

[0014] 3. This invention acquires the real-time voltage of the main input power supply of each intelligent power supply module and compares it with a preset effective voltage threshold. If the real-time voltage of the main input power supply of a certain intelligent power supply module is lower than the preset effective voltage threshold, then the main input power supply of that intelligent power supply module is faulty; otherwise, it means that the main input power supply of that intelligent power supply module is not faulty. This method is used to determine whether the main input power supply of each intelligent power supply module is faulty. When the main input power supply of each intelligent power supply module is faulty, the program status instruction from the CPU module is acquired, the program status instruction type is parsed, the decision is executed according to the program status instruction type, and the main input power supply of each intelligent power supply module is continuously monitored. This reduces the life cycle cost and energy efficiency of the PLC power supply system and ensures the high reliability of the PLC power supply. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the system structure connection of the present invention.

[0017] Figure 2 This is a schematic diagram of the dual-module collaborative configuration of the system of the present invention in a PLC rack.

[0018] Figure 3 This is a block diagram of the internal functional unit architecture of a single intelligent power supply module in this invention.

[0019] Figure 4 This is a flowchart illustrating the overall logic flow of the system of the present invention when switching from main input power supply to program-responsive battery power supply. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 As shown, the present invention provides a modular PLC redundant power supply system with integrated program-responsive intelligent UPS, including: an intelligent power supply module.

[0022] The intelligent power supply module includes a main input and power conversion unit, an embedded energy storage unit, a programmable multiple output unit, and a collaborative intelligent control unit.

[0023] It should be noted that the present invention is composed of at least two intelligent power supply modules with identical structure and function working together. Each intelligent power supply module includes a main input and power conversion unit, an embedded energy storage unit, a programmable multiple output unit, and a collaborative intelligent control unit.

[0024] The main input and power conversion unit is used to connect to an external main power supply and convert it into the form of electrical energy required by the system.

[0025] It should be noted that the required form of electrical energy is intermediate bus voltage.

[0026] In a specific embodiment, the main input and power conversion unit operates as follows: First, an external 24V power supply is connected. Then, the external 24V power supply is processed for EMC, reverse connection protection, overvoltage protection, and filtering. The processed external 24V power supply is called the marking power supply. The marking power supply is input into the DC-DC converter to generate the intermediate bus voltage.

[0027] The embedded energy storage unit is used to form a built-in backup energy source through a rechargeable battery and various battery management circuits.

[0028] It should be noted that the embedded energy storage unit uses a battery pack composed of rechargeable batteries. The battery pack is configured by series, parallel or a combination thereof, and is equipped with a battery management circuit with charge and discharge management, power metering, equalization and protection functions. The specific combination of the battery pack is designed by the designers.

[0029] The programmable multiplexer unit is used to provide independent and controllable DC power output for several channels.

[0030] In one specific embodiment, the programmable multiplexer includes Buck circuit 1, Buck circuit 2, Buck circuit 3, Buck circuit 4, and Boost circuit.

[0031] It should be noted that Buck circuit 1 is used for the backplane and module power supply, Buck circuit 2 and Buck circuit 3 are used for the CPU and core chip, Buck circuit 4 is used for the PHY core, and Boost circuit is used for I / O and communication.

[0032] In the above, the output voltage and current of Buck circuit 1 is 5V / 8A, the output voltage and current of Buck circuit 2 is 3.3V / 3A, the output voltage and current of Buck circuit 3 is 1.8V / 3A, the output voltage and current of Buck circuit 4 is 1.2V / 3A, and the output voltage and current of Boost circuit is 24V / 1A.

[0033] The collaborative intelligent control unit is used to acquire program status instructions and global power supply status information to make working mode decisions.

[0034] It should be noted that the global power supply status information includes the main input power status of each intelligent power supply module, the energy storage unit status, and load information.

[0035] Among them, the main input power status refers to whether the main input power of each intelligent power supply module has failed, including whether the main input power of the intelligent power supply module has failed or not. The energy storage unit status includes standby, charging and discharging. The load information refers to the output voltage and current of each channel in the programmable multi-output unit.

[0036] It should also be noted that the operating modes include normal operating mode, redundant mode, and redundant power supply mode.

[0037] In one specific embodiment, the collaborative intelligent control unit consists of program state perception, inter-module state coordination, and intelligent scheduling and execution.

[0038] In the above, the program status awareness is achieved by receiving program status instructions from the CPU module in real time through the PLC system backplane bus.

[0039] The inter-module status coordination is achieved through a dedicated inter-module communication link, where each intelligent power supply module exchanges its main input power status, energy storage unit status, and load information.

[0040] The intelligent scheduling and execution unit determines whether the main input power of each intelligent power supply module has failed by receiving program status instructions, as well as the main input power status, energy storage unit status and load information of each intelligent power supply module, and switches the working mode of each intelligent power supply module according to the judgment result.

[0041] The specific process for determining whether the main input power supply of each intelligent power supply module has failed is as follows: obtain the real-time voltage of the main input power supply of each intelligent power supply module and compare it with its preset effective voltage threshold. If the real-time voltage of the main input power supply of a certain intelligent power supply module is lower than the preset effective voltage threshold, then the main input power supply of that intelligent power supply module has failed; otherwise, it means that the main input power supply of that intelligent power supply module has not failed. This method is used to determine whether the main input power supply of each intelligent power supply module has failed.

[0042] It should be noted that the preset effective voltage threshold is used to determine whether the main input power supply of each intelligent power supply module has failed, and the preset effective voltage threshold is set by the staff.

[0043] It should also be noted that the main input and power conversion unit monitors the real-time voltage of the main input power supply of each intelligent power supply module in real time.

[0044] The above-mentioned process of switching the working mode of each intelligent power supply module according to the judgment result is as follows: When the main input power of each intelligent power supply module fails, A11, obtain the program status instruction from the CPU module and parse the program status instruction type; A12, execute the decision according to the program status instruction type, and continue to monitor the main input power of each intelligent power supply module to determine whether the main input power of each intelligent power supply module is effective; A13, if the main input power of each intelligent power supply module is effective, then each intelligent power supply module switches to the redundancy mode; otherwise, repeat A11-A13 until each intelligent power supply module switches to the redundancy mode.

[0045] It should be noted that the collaborative intelligent control unit uses the instruction parsing logic built into the firmware to perform power management semantic parsing on the program status instructions and obtain the program status instruction type. The program status instruction types include critical motion control, low power standby, ultra-low power hold, and emergency safety stop.

[0046] The instruction parsing logic is designed by the designers based on the program state instruction generation logic, while the sequence state instruction generation logic is set by the designers.

[0047] When there are both intelligent power supply modules with failed main input power and those with valid main input power, the intelligent power supply modules with valid main input power switch to redundant power supply mode, while the intelligent power supply modules with failed main input power enter standby mode.

[0048] When the main input power of each intelligent power supply module is not failed, a NORMAL program status command is sent.

[0049] The above-mentioned decision-making based on the program state instruction type is as follows: when the program state instruction type is critical motion control, the full protection strategy is executed; when the program state instruction type is low power standby, the energy-saving maintenance strategy is executed; when the program state instruction type is ultra-low power maintenance, the ultra-low power strategy is executed; and when the program state instruction type is emergency safety stop, the safety priority strategy is executed.

[0050] In the above, the full protection strategy refers to maintaining the full output of each channel in the programmable multiplexer unit; the energy-saving maintenance strategy refers to adjusting the output voltage of Buck circuit 1 in the programmable multiplexer unit to 4.8V, turning off the output of the Boost circuit, and maintaining the full output of Buck circuits 2, 3, and 4; the ultra-low power consumption strategy refers to turning off the outputs of Buck circuits 1, 4, and the Boost circuit in the programmable multiplexer unit, and maintaining the minimum output of Buck circuits 2 and 3; and the safety priority strategy refers to turning off the outputs of Buck circuits 1, 2, 3, and 4 in the programmable multiplexer unit, and maintaining only the output of the Boost circuit.

[0051] Example 2: Figure 2 The demonstration showed two intelligent power supply modules (Module A and Module B) that are connected to independent main input power supplies, connected to the CPU module via a backplane bus, and exchange information through an inter-module collaborative communication link. Figure 3 The four core units of a single intelligent power supply module are revealed: the main input and power conversion unit, the embedded energy storage unit, the programmable multiple output unit, and the collaborative intelligent control unit responsible for overall coordination. Figure 4 The core decision-making chain of the system's operation is illustrated in flowchart form: continuous collaborative judgment of all main input states; if not a total failure, power is supplied by the available modules; only in the event of a total failure does the system enter battery power mode, where differentiated and fine-grained power supply control is executed based on the CPU's program state instructions. (Reference) Figure 2 As shown, in a high-reliability PLC station, two identical intelligent power supply modules are used to form a 1+1 redundant system. (Reference) Figure 3 The specific implementation method of each intelligent power supply module shown is as follows.

[0052] Main Input and Power Conversion Unit: Designed to accept a single 24V DC industrial power input, it includes necessary protection and filtering circuitry, and generates a stable intermediate bus voltage through a high-efficiency DC-DC converter. This unit monitors the validity of the input voltage in real time.

[0053] Embedded energy storage unit: It adopts a battery pack composed of rechargeable batteries, which is configured by series, parallel or a combination thereof, and is equipped with a battery management circuit with charge and discharge management, power metering, balancing and protection functions.

[0054] Programmable Multiplexer Unit: Includes multiple digitally adjustable power supply circuits using Buck and Boost topologies. Provides five outputs: one 5V / 8A for backplane and module power, one 3.3V / 3A and one 1.8V / 3A for the CPU and core chip, one 1.2V / 3A for the PHY core, and one 24V / 1A boosted from battery voltage via a Boost circuit for I / O and communication. Each output circuit supports dynamic programming and control of output voltage, current limits, and on / off states via an internal digital control bus.

[0055] Collaborative Intelligent Control Unit: As the key component of this invention, its hardware foundation is built around an MCU or CPU integrating a high-speed analog-to-digital converter, multiple timers, and dedicated communication interfaces. The internal non-volatile memory of this processing unit stores embedded firmware, which integrates collaborative decision-making logic, a policy mapping table, a real-time communication protocol stack, and multi-loop control algorithms, collectively forming the software core of all intelligent management functions. Its operational mechanism is as follows: the firmware connects to the system backplane instruction bus through one communication interface to receive program status instructions from the main controller in real time; simultaneously, it connects to the inter-module collaborative bus through another independent communication interface to achieve status synchronization and joint decision-making with other power modules. The policy execution engine in the firmware runs as a high-priority task, comprehensively processing the above instructions and collaborative data, querying the policy mapping table, and generating corresponding digital control signals to precisely and dynamically adjust the parameters of each channel of the programmable multi-output unit.

[0056] Example of system collaborative workflow (combined) Figure 4 Normal operation: Inputs to both modules A and B are valid. The two modules negotiate their status through an inter-module collaborative communication link and jointly power the system in a current-sharing mode. The CPU program runs in a normal scan cycle and sends the NORMAL program status command.

[0057] Module A Input Failure (Hot Standby Switching): Module A's MCU detects an input failure and notifies Module B of the status change via the cooperative communication interface. After Module B's MCU confirms the failure, it immediately increases its output and assumes the entire system load independently. Module A enters standby mode. The entire process is powered by Module B's main input; the battery is not involved.

[0058] Module B input subsequently fails (triggers backup): Module B input also fails. The MCUs of both modules interact through a cooperative communication mechanism to confirm that the global state of all main inputs failing is valid.

[0059] Enter Program-Responsive Battery Powered (Full-Function Mode): Both modules switch synchronously to be powered by their respective batteries.

[0060] Suppose that the CPU is currently executing a crucial closed-loop control algorithm, continuously sending CRITICAL_CONTROL instructions.

[0061] The MCUs of both modules query the strategy mapping table according to this instruction and execute the full protection strategy: instructing their output units to maintain full and high-precision output of all voltage rails (5V, 3.3V, 1.8V, 1.2V, 24V) to ensure stable execution of the control algorithm.

[0062] Program state change, strategy adaptive adjustment (entering energy-saving maintenance mode): The critical control cycle ends, the CPU enters data recording and low-power standby state, and sends the LOW_POWER_STANDBY instruction.

[0063] Both MCU modules then switched to a power-saving strategy: slightly reducing the 5V output to 4.8V, shutting down the 24VI / O power output, but maintaining the CPU core voltage (3.3V, 1.8V, 1.2V) at normal levels to preserve data and status. The total system power consumption was significantly reduced.

[0064] Entering Ultra Low Power Hold Mode (for extended battery life): When the CPU program has completed all necessary data saving and entered a deep sleep or long-term state hold phase, the ULTRALOW_POWER_HOLD instruction is sent.

[0065] Upon receiving the instruction, the two MCU modules execute an ultra-low power strategy: shutting down the 5V, 1.2V, and 24V outputs, maintaining only the 3.3V and 1.8V core voltages, and adjusting these two voltages to their minimum allowable values ​​for stable operation (e.g., 3.15V and 1.75V). In this mode, the overall system power consumption is reduced to the milliwatt level, achieving an ultra-long battery life of several days or even weeks, providing unprecedented time assurance for the core controller's state maintenance and rapid recovery.

[0066] Extreme safety scenario: If the program triggers an emergency safety stop and sends an EMERGENCY_STOP instruction, the MCU will execute a safety priority strategy: immediately cut off the unsafe 24V output, but ensure that the specific power supply channels to the safety relay and CPU safety logic are maintained.

[0067] The intelligent power supply module in this embodiment of the invention consists of a main input and power conversion unit, an embedded energy storage unit, a programmable multiple output unit, and a collaborative intelligent control unit. The main input and power conversion unit is used to connect to an external main power supply and convert it into the electrical energy required by the system. The embedded energy storage unit is used to form a built-in backup energy source. The programmable multiple output unit is used to provide independent and controllable DC power output for several channels. The collaborative intelligent control unit is used to acquire program status instructions and global power supply status information, and make working mode decisions. This creates a new paradigm of program-defined emergency power supply, improves the emergency endurance capability of the PLC power supply system, reduces the life cycle cost and energy efficiency of the PLC power supply system, and ensures the high reliability of the PLC power supply.

[0068] The examples described in this invention are not limited to the specific embodiments listed above. The examples are merely illustrative to facilitate understanding of the invention and do not constitute a limitation on the scope of protection of this invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of this invention should be included within the scope of protection.

[0069] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in this specification, they should all fall within the protection scope of the present invention.

Claims

1. A modular PLC redundant power supply system with integrated program-responsive intelligent UPS, characterized in that, Includes the following modules: The intelligent power supply module includes a main input and power conversion unit, an embedded energy storage unit, a programmable multiple output unit, and a collaborative intelligent control unit. The main input and power conversion unit is used to connect to an external main power supply and convert it into the form of electrical energy required by the system. The embedded energy storage unit is used to form a built-in backup energy source through a rechargeable battery and various battery management circuits. The programmable multiplexer unit is used to provide independent and controllable DC power output for several channels; The collaborative intelligent control unit is used to acquire program status instructions and global power supply status information to make working mode decisions.

2. The modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 1, characterized in that, The main input and power conversion unit operates as follows: First, an external 24V power supply is connected. Then, the input external 24V power supply is processed for EMC, reverse connection protection, overvoltage protection, and filtering. The processed external 24V power supply is called the marking power supply. The marking power supply is input into the DC-DC converter to generate the intermediate bus voltage.

3. The modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 1, characterized in that, The programmable multiplexer includes Buck circuit 1, Buck circuit 2, Buck circuit 3, Buck circuit 4, and Boost circuit.

4. The modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 3, characterized in that, The output voltage and current of Buck circuit 1 is 5V / 8A, the output voltage and current of Buck circuit 2 is 3.3V / 3A, the output voltage and current of Buck circuit 3 is 1.8V / 3A, the output voltage and current of Buck circuit 4 is 1.2V / 3A, and the output voltage and current of Boost circuit is 24V / 1A.

5. A modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 1, characterized in that, The collaborative intelligent control unit consists of program state perception, inter-module state coordination, and intelligent scheduling and execution.

6. A modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 5, characterized in that, The program status awareness is achieved by receiving program status instructions from the CPU module in real time via the PLC system backplane bus. The inter-module status coordination is achieved through a dedicated inter-module communication link, where each intelligent power supply module exchanges its main input power status, energy storage unit status, and load information. The intelligent scheduling and execution unit determines whether the main input power of each intelligent power supply module has failed by receiving program status instructions, as well as the main input power status, energy storage unit status and load information of each intelligent power supply module, and switches the working mode of each intelligent power supply module according to the judgment result.

7. A modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 6, characterized in that, The specific process for determining whether the main input power supply of each intelligent power supply module has failed is as follows: The real-time voltage of the main input power supply of each intelligent power supply module is obtained and compared with its preset effective voltage threshold. If the real-time voltage of the main input power supply of a certain intelligent power supply module is lower than the preset effective voltage threshold, then the main input power supply of the intelligent power supply module is failed. Otherwise, it means that the main input power supply of the intelligent power supply module is not failed. This method is used to determine whether the main input power supply of each intelligent power supply module is failed.

8. A modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 6, characterized in that, The specific process of switching the working mode of each intelligent power supply module according to the judgment result is as follows: When the main input power of each intelligent power supply module fails, A11: Obtain the program status instruction from the CPU module and parse the program status instruction type; A12: Execute the decision according to the program status instruction type and continue to monitor the main input power of each intelligent power supply module to determine whether the main input power of each intelligent power supply module is effective; A13: If the main input power of each intelligent power supply module is effective, then each intelligent power supply module switches to redundancy mode; otherwise, repeat A11-A13 until each intelligent power supply module switches to redundancy mode. When there are intelligent power supply modules with failed main input power and intelligent power supply modules with valid main input power, the intelligent power supply modules with valid main input power switch to redundant power supply mode, and the intelligent power supply modules with failed main input power enter standby mode. When the main input power of each intelligent power supply module is not failed, a NORMAL program status command is sent.

9. A modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 8, characterized in that, The specific process of making decisions based on program state instruction type is as follows: When the program status instruction type is critical motion control, the full protection strategy is executed; when the program status instruction type is low power standby, the energy-saving maintenance strategy is executed; when the program status instruction type is ultra-low power hold, the ultra-low power strategy is executed; and when the program status instruction type is emergency safety stop, the safety priority strategy is executed.

10. A modular PLC redundant power supply system with integrated program-responsive intelligent UPS according to claim 9, characterized in that, The full protection strategy refers to maintaining the full output of each channel in the programmable multiplexer unit. The energy-saving maintenance strategy refers to adjusting the output voltage of Buck circuit 1 in the programmable multiplexer unit to 4.8V, turning off the output of the Boost circuit, and maintaining the full output of Buck circuits 2, 3, and 4. The ultra-low power strategy refers to turning off the outputs of Buck circuits 1, 4, and the Boost circuit in the programmable multiplexer unit, and maintaining the minimum output of Buck circuits 2 and 3. The safety priority strategy refers to turning off the outputs of Buck circuits 1, 2, 3, and 4 in the programmable multiplexer unit, and maintaining only the output of the Boost circuit.

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