CN108693825B - Detection method and device for PLC input/output module - Google Patents

Detection method and device for PLC input/output module Download PDF

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CN108693825B
CN108693825B CN201810366291.4A CN201810366291A CN108693825B CN 108693825 B CN108693825 B CN 108693825B CN 201810366291 A CN201810366291 A CN 201810366291A CN 108693825 B CN108693825 B CN 108693825B
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module
plc
output module
input
channel
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CN108693825A (en
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张春
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Siemens Factory Automation Engineering Ltd
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Siemens Factory Automation Engineering Ltd
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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
    • G05B19/054—Input/output
    • 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
    • G05B2219/11—Plc I-O input output
    • G05B2219/1105—I-O

Abstract

The invention discloses a PLC input/output module and a detection device, comprising: comparing the read PLC input/output module model data information with the tested PLC input/output module model data information selected on the first human-computer interface terminal, and applying working voltage to a power supply terminal of the PLC input/output module according to the module type if the comparison result is consistent; comparing the value/signal of each channel of the PLC input module with a given value/signal, if the comparison result is consistent or within an error range, or sequentially outputting the given value in an output address mapping area of the PLC output module, detecting a voltage/current signal output by a terminal corresponding to each channel of the module, and if the PLC output module only has an output signal within the error range in one channel, judging that the channel of the module is normal; otherwise, judging the channel fault. The PLC input/output module and the detection device can detect whether the channels of the PLC input/output module are normal or not and whether short-circuit faults exist among the channels of the PLC input/output module or not.

Description

Detection method and device for PLC input/output module
Technical Field
The invention relates to the field of detection of PLC input/output modules, in particular to a detection method and a detection device of a PLC input/output module.
Background
PLC (Programmable logic Controller) is widely used in the field of automation control, for example, SIMATIC S7-300 series developed by Siemens. In the practical application process, it is very important to detect the input and output modules of the PLC.
At present, for the detection of the input/output module of the PLC, most of the methods apply high level signals to all channels of the input/output module of the PLC, and detect the signal output condition of the output end to determine whether the channel of the input/output module of the PLC has a fault.
Disclosure of Invention
The invention provides a PLC input/output module detection method and device, which can be used for detecting whether channels of a PLC input/output module are normal or not and whether short-circuit faults exist among the channels of the PLC input/output module or not.
According to an aspect of an embodiment of the present invention, there is provided a PLC input/output module detecting method, including:
reading the model data information of the PLC input/output module to be tested, and selecting the model data information of the PLC input/output module to be tested on a human-computer interface terminal;
comparing the read model data information of the PLC input/output module with the model data information of the tested PLC input/output module selected on the human-computer interface terminal to obtain a first comparison result;
if the first comparison result is consistent, applying a working voltage to a power supply terminal of the PLC input/output module according to the type of the PLC input/output module, and executing the following steps according to the type of the PLC input/output module:
when the input/output module is a digital quantity input module:
sequentially inputting direct-current voltage signals to corresponding terminals of each channel of the PLC input module, and reading numerical values of each channel of an input address mapping area of the PLC input module; comparing the read numerical value of each channel with the first given numerical value to obtain a second comparison result; if the second comparison result is consistent, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the input/output module is a digital quantity output module:
sequentially inputting a second given numerical value in an output address mapping area of the PLC output module, and reading output voltage values of terminals corresponding to channels of the PLC output module; if the PLC output module only has output end voltage in one channel, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
when the input/output module is an analog input module:
sequentially inputting given signals to corresponding terminals of each channel of the PLC input module, and reading numerical values of each channel of the input address mapping area; comparing the read numerical value of each channel with the corresponding numerical value of the given signal to obtain a third comparison result; if the third comparison result is within the module error range, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the PLC input/output module is an analog output module, sequentially inputting a third given numerical value in an output address mapping area of the PLC output module, and reading a voltage/current signal output by a corresponding terminal of each channel of the PLC output module; if the PLC output module only outputs a voltage/current signal in one channel and the voltage/current signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
and if the first comparison result is inconsistent, terminating the detection.
In this application embodiment, the model data information of PLC input/output module includes data information such as the model, the state and the hardware configuration of the module under test, and is right through data information's contrast is verified, can guarantee to be tested the module and input the test signal that corresponds in the testing process, avoids operating personnel to select the model of the module under test to cause the damage.
Applying a working voltage to a power supply terminal of the PLC input/output module according to the type of the PLC input/output module; and comparing the numerical value live signal of each channel of the PLC input module with a given numerical value or a given signal, if the comparison result is consistent or within an error range, judging that the channel of the PLC input module is normal, and otherwise, judging that the channel is in fault. The method comprises the steps of sequentially outputting given numerical values in an output address mapping area of a PLC output module, detecting output voltage or current signals of corresponding terminals of each channel of the PLC output module, judging whether the channel of the PLC input module is normal if the PLC output module only outputs the voltage or current signals within an error range in one channel, and otherwise, judging whether the channel is in fault.
In the embodiment of the application, the method and the device for detecting the PLC input/output module can detect whether the channels of the PLC input/output module are normal or not and whether short-circuit faults exist among the channels of the PLC input/output module or not, so that the condition that the fault points are omitted in the detection of the PLC input/output module is avoided.
Optionally, when the input/output module is an analog input module, sequentially inputting a given signal at a terminal corresponding to each channel of the PLC input module includes:
when the PLC input/output module is a voltage type analog input module, sequentially inputting a direct-current voltage given signal with a preset numerical value into each channel of the voltage type analog input module;
when the PLC input/output module is a current type analog input module, sequentially inputting a direct current given signal with a preset numerical value into each channel of the current type analog input module;
when the PLC input/output module is a thermal resistor type analog input module, resistors with preset resistance values are sequentially connected to each channel of the thermal resistor type analog input module;
when the PLC input/output module is a thermocouple type analog input module, direct-current millivolt signals with preset values are sequentially input into each channel of the thermocouple type analog input module.
Optionally, if the PLC input/output module is a safe type module, after applying a working voltage to a power supply terminal of the PLC input/output module according to a type of the PLC input/output module if the first comparison result is consistent, the detecting method includes:
and running a passivation program to confirm that the PLC input and output module is in a normal state, and continuously executing the safety program of the PLC input and output module.
Optionally, the detection method further includes:
and storing the detection result of the PLC input and output module and generating a detection report.
According to another aspect of the embodiments of the present invention, there is provided a PLC input/output module detecting apparatus 200, including:
an information obtaining module 210, configured to read model data information of the PLC input/output module to be tested, and select the model data information of the PLC input/output module to be tested on a human-computer interface terminal 120;
and the comparison module 220 is configured to compare the read model data information of the PLC input/output module with the model data information of the tested PLC input/output module selected on the human-computer interface terminal 120, so as to obtain a first comparison result.
A first processing module 230, configured to apply a working voltage to a power supply terminal of the PLC input/output module according to a type of the PLC input/output module if the first comparison result is consistent; and if the first comparison result is inconsistent, terminating the detection.
A second processing module 240, configured to sequentially input a dc voltage signal with a first given value at a terminal corresponding to each channel of the PLC input module when the input/output module is a digital input module, and read a value of each channel of an input address mapping area of the PLC input module; comparing the read numerical value of each channel with a given numerical value to obtain a second comparison result; if the second comparison result is consistent, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the input/output module is a digital quantity output module, sequentially inputting a second given numerical value in an output address mapping area of the PLC output module, and detecting output voltage values of terminals corresponding to channels of the PLC output module; if the PLC output module only has output end voltage in one channel, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
when the input/output module is an analog input module, given signals are sequentially input to corresponding terminals of each channel of the PLC input module, and numerical values of each channel of the input address mapping area are read; comparing the numerical value read from each channel with the corresponding given numerical value of the given signal to obtain a third comparison result; if the third comparison result is within the module error range, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the PLC input/output module is an analog output module, sequentially inputting a third given numerical value in an output address mapping area of the PLC output module, and reading output voltage/current signals of terminals corresponding to channels of the PLC output module; if the PLC output module only outputs a voltage/current signal at one channel terminal and the voltage/current signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module.
Optionally, the second processing module 240 is further configured to:
when the PLC input/output module is a voltage type analog input module, given signals of direct current voltage with preset values are sequentially input to corresponding terminals of each channel of the voltage type analog input module;
when the PLC input/output module is a current type analog input module, given signals of direct current with preset values are sequentially input to corresponding terminals of each channel of the current type analog input module;
when the PLC input/output module is a thermal resistor type analog input module, the corresponding terminals of each channel of the thermal resistor type analog input module are sequentially connected with resistors with preset resistance values;
when the PLC input/output module is a thermocouple type analog input module, direct-current millivolt given signals with preset values are sequentially input to corresponding terminals of each channel of the thermocouple type analog input module.
Optionally, the detection apparatus further comprises:
and the blunt removing module 250 is used for running a blunt removing program when the PLC input and output module is a safety module so as to confirm that the state of the PLC input and output module is normal and continuously executing the safety program of the PLC input and output module.
Optionally, the detection apparatus further comprises:
and the storage module 260 is used for storing the detection result of the PLC input/output module and generating a detection report.
According to another aspect of the embodiments of the present invention, there is provided a PLC input/output module detecting apparatus 300, including: at least one memory 301, at least one processor 302, wherein:
the at least one memory 301 for storing program instructions;
the at least one processor 302 is configured to call the program instructions stored in the at least one memory to perform any one of the above PLC i/o module detection methods.
According to yet another aspect of embodiments of the present invention, there is provided a computer readable storage medium having stored thereon program instructions; the program instructions can be executed by a processor and realize the detection method of the PLC input and output module.
In the above scheme, in the embodiment of the present invention, by comparing the values of the channels of the PLC input module with the given values/signals, if the comparison result is consistent or within the module error range, or outputting the voltage/current signals at the corresponding terminals of the channels of the PLC output module, if the PLC output module only outputs the voltage/current signals within the module error range in one channel, it is determined that the channel of the PLC output module is normal, otherwise, it is determined that the channel of the PLC output module is faulty. According to the technical scheme, whether the channels of the PLC input and output module are normal or not and whether short-circuit faults exist between the channels of the module or not can be detected.
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The foregoing and other features and advantages of the present application will become more apparent to those of ordinary skill in the art to which the present application pertains by describing in detail preferred embodiments thereof with reference to the accompanying drawings, wherein:
fig. 1 is a schematic diagram of a PLC input/output module detection provided in another embodiment of the present invention;
fig. 2 is a flowchart of a method for detecting a PLC i/o module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a detection apparatus of a PLC input/output module according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a PLC input/output module detection apparatus according to another embodiment of the present invention.
Wherein the reference numbers are as follows:
Figure BDA0001637349870000051
Figure BDA0001637349870000061
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this invention, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, fig. 1 is a schematic diagram of a detection of a PLC input/output module according to an embodiment of the present invention. The PLC can be selected as SIMATIC S7-300 series, and in the input and output module detection process of the PLC, the input and output module 140 of the PLC to be detected is connected with the programmable logic controller 130 for test, the input and output detection module general connecting circuit 110 of the PLC and the human-computer interface terminal 120 through the IM153-2 interface module 141 and the interface module 150.
Those skilled in the art can understand that the multi-channel switching device motherboard, the multifunctional circuit board and the universal unit test circuit board are disposed in the input/output detection module 100 of the PLC, so that the functions of power supply, power supply overcurrent protection, thermocouple test, thermal resistance test, safety test and the like of the test module in the input/output detection circuit of the PLC can be realized.
The programmable logic controller 130 for testing acquires data information including the model, the state and the hardware configuration of the module under test 140, and compares the data information with the relevant data information of the selected module under test on the human-computer interface terminal 120 for verification, so as to avoid damage caused by the fact that an operator selects the model of the module under test by mistake. The testing method can ensure that the PLC for testing outputs corresponding testing signals to the tested module 400 according to corresponding testing programs, realizes the detection of the tested PLC input/output module 440, judges whether the channels of the tested module 440 are normal or not, and detects whether short-circuit faults exist between the module channels of the tested PLC input/output module 440 or not.
As shown in fig. 2, the present application provides a flow chart of a detection method for a PLC input/output module, wherein the detection method includes:
and S01, reading the model data information of the PLC input/output module to be tested, and selecting the model data information of the PLC input/output module to be tested on a human-computer interface terminal.
In the embodiment of the application, the model data information of the PLC input/output module includes data information such as a model, a state, and hardware configuration of a module to be tested.
And S02, comparing the read model data information of the PLC input/output module with the model data information of the PLC input/output module selected and tested on the human-computer interface terminal to obtain a first comparison result.
The PLC input/output module and the tested PLC input/output module selected on the human-computer interface are compared with the data information, so that the tested module can input a corresponding test signal in the test process, and the damage caused by the fact that an operator selects the model of the tested module by mistake is avoided.
And S03, if the first comparison result is consistent, applying a working voltage to the power supply terminal of the PLC input/output module according to the type of the PLC input/output module, and executing the step S04 according to the type of the PLC input/output module.
In the embodiment of the application, because the power supply terminals of the PLC input/output modules of different models are different, after the model data information of the PLC input/output module is detected to be consistent with the model data information of the tested PLC input/output module selected on the human-computer interface, the processing flow corresponding to the PLC input/output module of the corresponding model is selected. And simultaneously, applying a working voltage to the corresponding power supply terminal according to the type of the PLC input/output module to be tested.
In this embodiment, the operating voltage may be a 24V dc voltage provided at the power supply terminal of the PLC input/output module, so as to facilitate further detection of the module under test.
S04, when the input/output module is a digital input module:
sequentially inputting direct-current voltage signals to corresponding terminals of each channel of the PLC input module, and reading numerical values of each channel of an input address mapping area of the PLC input module; comparing the read numerical value of each channel with the first given numerical value to obtain a first comparison result; if the first comparison result is consistent, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the PLC input and output module is a digital quantity output module:
sequentially inputting a third given numerical value in an output address mapping area of the PLC output module, and reading output voltage values of terminals corresponding to channels of the PLC output module; if the PLC output module only has output end voltage in one channel, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
when the input/output module is an analog input module:
sequentially inputting given signals to corresponding terminals of each channel of the PLC input module, and reading numerical values of each channel of the input address mapping area; comparing the read numerical value of each channel with the corresponding numerical value of the given signal to obtain a third comparison result; if the third comparison result is within the module error range, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the PLC input and output module is an analog output module:
sequentially inputting a third given numerical value in an output address mapping area of the PLC output module, and reading a voltage/current signal output by a corresponding terminal of each channel of the PLC output module; if the PLC output module only outputs a voltage/current signal in one channel and the voltage/current signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module.
In this embodiment, if the PLC i/o module is a secure module, a passivation program needs to be run first when the type of module is detected, so as to confirm that the PLC i/o module is in a normal state, and continue to execute the secure program of the PLC i/o module.
The PLC input module is a digital input module and can be divided into a digital input/output module and an analog input/output module. Furthermore, the digital input/output module is further divided into a digital input module and a digital output module; the analog input and output module can be divided into: the device comprises a voltage type analog input module, a current type analog input module, a thermal resistance type analog input module, a thermocouple type analog input module and an analog output module.
For the detection of the digital input module, a direct current voltage signal is sequentially input to corresponding terminals of each channel of the digital input module. For example, a 24V dc voltage signal, further reading the values of the channels in the input address mapping area of the digital input module, thereby determining that the digital input module with normal channels is the one with the values of the channels consistent with the given values; otherwise, the module is a channel fault module. It should be noted that the given value is a value of each channel mapped by an input address of the digital input module under a normal condition of each channel of the digital input module.
For the detection of the digital output module, a given value, for example, a high level signal of direct current 24V, is sequentially output in an output address mapping area of the digital output module, and an output voltage value of a terminal corresponding to each channel of the PLC output module is further read. And further judging the channel abnormal condition of the digital output module by checking whether the digital output module has output voltage in only one channel. When the digital output module only has output voltage in one channel, the digital output module is indicated to be normal in each channel, otherwise, the digital output module is judged to have channel fault.
In this embodiment, when the input/output module is an analog input module, the given signal is sequentially input to the corresponding terminal of each channel of the PLC input module, and the method mainly includes:
and sequentially inputting a direct-current voltage given signal with a preset numerical value into each channel of the voltage type analog input module aiming at the voltage type analog input module. Wherein the predetermined value of the dc voltage may include: 0V, 2.5V, 5V, 7.5V, 10V and other DC voltages.
And sequentially inputting a direct current given signal with a preset numerical value into each channel of the current type analog input module aiming at the current type analog input module. Wherein the predetermined value of the direct current may include: 0mA, 5mA, 10mA and the like.
Aiming at the thermal resistance type analog quantity input module, resistors with preset resistance values are sequentially connected to all channels of the thermal resistance type analog quantity input module. Wherein the resistors of the predetermined resistance value comprise a certain number of 100 Ω resistors.
And sequentially inputting direct-current millivolt signals with preset values into each channel of the thermocouple type analog input module aiming at the thermocouple type analog input module. Wherein the direct-current millivolt signals with the preset values comprise voltage signals of 5mV, 8mV and the like.
In this embodiment, when the PLC input/output module is an analog output module, a third given value is sequentially input to an output address mapping area of the PLC output module, where the third given value may be a voltage signal such as 0V or 2.5V, and the voltage signal output by a corresponding terminal of each channel of the PLC output module is read; if the PLC output module only has an output voltage signal in one channel and the voltage signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module.
It is to be understood that the third given value in this application may also be other signals including a voltage signal and a current signal, and is not limited herein.
And S05, if the first comparison result is inconsistent, terminating the detection.
In the embodiment of the application, if the model data information of the PLC input/output module is inconsistent with the model data information of the PLC input/output module selected on the human-computer interface and tested, the detection of the PLC input/output module is directly terminated, and the module is prevented from being damaged.
In order to improve the accuracy and reliability of the detection of the PLC input/output module, the detection of the PLC input/output module needs to be repeatedly detected for a plurality of times. For example, a repetitive detection process may be adopted which repeats 5 to 10 times.
Of course, in the detection process, the detection result of the PLC input/output module may be processed and a detection report may be generated.
As shown in fig. 3, the present application provides a schematic structural diagram of a detection apparatus of a PLC input/output module according to another embodiment. In fig. 3, the PLC input/output module detection apparatus 200 includes: an information acquisition module 210, a comparison module 220, a first processing module 230, a second processing module 240, a de-blunting module 250, and a storage module 260.
The information obtaining module 210 is configured to read model data information of the PLC input/output module to be tested, and select the model data information of the PLC input/output module to be tested on a human-computer interface terminal 120.
In this embodiment, the information obtaining module 210 reads the model data information of the PLC input/output module to be tested, which includes model, status, hardware configuration, and other data information.
And the comparison module 220 is configured to compare the read model data information of the PLC input/output module with the model data information of the tested PLC input/output module selected on the human-computer interface terminal 120, so as to obtain a first comparison result.
In this embodiment, the comparison module 220 obtains a comparison result by comparing the model data information of the PLC input/output module with the model, state, hardware configuration and other data information of the PLC input/output module to be tested selected on the human-computer interface terminal 120, so as to further implement data detection of the PLC input/output module to be tested.
A first processing module 230, configured to apply a working voltage to a power supply terminal of the PLC input/output module according to a type of the PLC input/output module if the first comparison result is consistent; and if the first comparison result is inconsistent, terminating the detection.
In the embodiment of the present application, the first processing module 230 is configured to further determine whether to terminate the test or to apply an auxiliary operating voltage to the corresponding power supply terminal of the module under test according to the comparison result of the comparing module 220, so as to facilitate the further test of the module under test. The auxiliary operating voltage may be a direct-current 24V voltage, or may be another operating voltage according to actual test requirements, which is not limited herein.
A second processing module 240, configured to sequentially input a dc voltage signal with a first given value at a terminal corresponding to each channel of the PLC input module when the input/output module is a digital input module, and read a value of each channel of an input address mapping area of the PLC input module; comparing the read numerical value of each channel with a given numerical value to obtain a second comparison result; if the second comparison result is consistent, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the input/output module is a digital quantity output module, sequentially inputting a second given numerical value in an output address mapping area of the PLC output module, and detecting output voltage values of terminals corresponding to channels of the PLC output module; if the PLC output module only has output end voltage in one channel, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
when the input/output module is an analog input module, given signals are sequentially input to corresponding terminals of each channel of the PLC input module, and numerical values of each channel of the input address mapping area are read; comparing the read numerical value of each channel with the corresponding given numerical value of the given signal to obtain a third comparison result; if the third comparison result is within the module error range, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the PLC input/output module is an analog output module, sequentially inputting a third given numerical value in an output address mapping area of the PLC output module, and reading output voltage/current signals of terminals corresponding to channels of the PLC output module; if the PLC output module only outputs a voltage/current signal at one channel terminal and the voltage/current signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module.
In this embodiment of the present application, the second processing module 240 is further configured to:
when the PLC input/output module is a voltage type analog input module, given signals of direct current voltage with preset values are sequentially input to corresponding terminals of each channel of the voltage type analog input module. According to different models of actual test modules, during the test process, the predetermined value of the dc voltage may include: 0V, 2.5V, 5V, 7.5V, 10V and other DC voltages.
When the PLC input/output module is a current type analog input module, given signals of direct current with preset values are sequentially input to corresponding terminals of each channel of the current type analog input module. In the detection process of the current-mode analog input module, the dc current signals with the predetermined values input to the corresponding terminals of each channel may include: 0mA, 5mA, 10mA and the like.
When the PLC input/output module is a thermal resistor type analog input module, the corresponding terminals of each channel of the thermal resistor type analog input module are sequentially connected with resistors with preset resistance values. In the detection process of the resistance type analog quantity input module, the resistors with the preset resistance values comprise a certain number of 100 omega resistors, for example, 5-10 resistors.
When the PLC input/output module is a thermocouple type analog input module, direct-current millivolt given signals with preset values are sequentially input to corresponding terminals of each channel of the thermocouple type analog input module. In the detection process of the thermocouple type analog quantity input module, the direct-current millivolt signals with the preset values comprise voltage signals of 5mV, 8mV and the like.
It should be noted that, the specific values of the dc voltage and the dc current with the predetermined values and the resistance with the predetermined resistance value may be further adjusted according to actual test requirements, and are not limited herein.
And the blunt removing module 250 is used for running a blunt removing program when the PLC input and output module is a safety module so as to confirm that the state of the PLC input and output module is normal and continuously executing the safety program of the PLC input and output module.
In the embodiment of the present application, the blunt removing module 250 executes a blunt removing program, which facilitates data detection when the PLC input/output module is a security module.
And the storage module 260 is used for storing the detection result of the PLC input/output module and generating a detection report.
In this embodiment of the application, the storage module 260 is configured to process a detection result of the PLC input/output module and generate a detection report after the detection of the PLC input/output module is completed.
Fig. 4 is a schematic structural diagram of a PLC input/output module detection apparatus according to another embodiment of the present invention. As shown in fig. 4, the PLC input/output module detecting device 300 shown in fig. 4 includes: at least one memory 301, a processor 302. The at least one memory 301 for storing a computer program; the at least one processor 302 is configured to invoke a computer program stored in the at least one memory to perform the log processing method described in any one of the above. The various components in terminal 300 are coupled together by a bus system 303. It will be appreciated that the bus system 303 is used to enable communications among the components. The bus system 303 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 303 in FIG. 3.
It will be appreciated that memory 301 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (PROM), an erasable programmable Read-only memory (erasabprom, EPROM), an electrically erasable programmable Read-only memory (EEPROM), or a flash memory. The volatile memory may be a Random Access Memory (RAM) which functions as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (staticiram, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (syncronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and direct memory bus SDRAM (DRRAM). The memory 301 of the systems and methods described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 301 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 3011 and application programs 3012.
The operating system 3011 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 3012 includes various applications, such as a media player (MediaPlayer), a Browser (Browser), and the like, and is used to implement various application services. A program for implementing the method according to an embodiment of the present invention may be included in the application 3012.
In the embodiment of the present invention, the processor 302 may execute the method executed by the log processing apparatus by calling a program or an instruction stored in the memory 301, specifically, a program or an instruction stored in the application 3012.
The method disclosed in the above embodiments of the present invention may be applied to the processor 302, or implemented by the processor 302. The processor 302 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 302. The processor 301 may be a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 302, and the processor 301 reads the information in the memory 302 and completes the steps of the method in combination with the hardware.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
In this embodiment, the processor 302 is specifically configured to:
reading the model data information of the PLC input/output module to be tested, and selecting the model data information of the PLC input/output module to be tested on a human-computer interface terminal;
comparing the read model data information of the PLC input/output module with the model data information of the PLC input/output module selected and tested on the human-computer interface terminal to obtain a first comparison result;
if the comparison result is consistent, applying a working voltage to a power supply terminal of the PLC input/output module according to the type of the PLC input/output module, and executing the following steps according to the type of the PLC input/output module:
when the input/output module is a digital quantity input module, sequentially inputting direct-current voltage signals at corresponding terminals of each channel of the PLC input module, and reading numerical values of each channel of an input address mapping area of the PLC input module; comparing the read numerical value of each channel with the first given numerical value to obtain a second comparison result; if the second comparison result is consistent, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
when the PLC input/output module is a digital quantity output module, sequentially inputting a second given numerical value in an output address mapping area of the PLC output module, and reading output voltage values of terminals corresponding to channels of the PLC output module; if the PLC output module only has output end voltage in one channel, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
when the input/output module is an analog input module, given signals are sequentially input to corresponding terminals of each channel of the PLC input module, and numerical values of each channel of the input address mapping area are read; comparing the value of each channel with a given value to obtain a comparison result; if the comparison result is within the module error range, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module; or
When the input/output module is an analog output module, sequentially outputting given numerical values in an output address mapping area of the PLC output module, and reading corresponding terminal output voltage/current signals of each channel of the PLC output module; if the PLC output module only outputs a voltage/current signal in one channel and the voltage/current signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
and if the first comparison result is inconsistent, terminating the detection.
Optionally, the processor 302 is further configured to: when the input/output module is the analog input/output module, the given signal is sequentially input to the corresponding terminal of each channel of the PLC input module, and the method comprises the following steps:
when the PLC input/output module is a voltage type analog input module, sequentially inputting a direct-current voltage given signal with a preset numerical value into each channel of the voltage type analog input module;
when the PLC input/output module is a current type analog input module, sequentially inputting a direct current given signal with a preset numerical value into each channel of the current type analog input module;
when the PLC input/output module is a thermal resistor type analog input module, resistors with preset resistance values are sequentially connected to each channel of the thermal resistor type analog input module;
when the PLC input/output module is a thermocouple type analog input module, direct-current millivolt signals with preset values are sequentially input into each channel of the thermocouple type analog input module.
Optionally, the processor 302 is further configured to: and running a passivation program to confirm that the PLC input and output module is in a normal state, and continuously executing the safety program of the PLC input and output module.
Optionally, the processor 302 is further configured to:
and storing the detection result of the PLC input and output module and generating a detection report.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the embodiment of the PLC i/o module detection method, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.

Claims (10)

  1. The detection method of the PLC input/output module is characterized by comprising the following steps:
    reading the model data information of the PLC input/output module to be tested, and receiving the model data information of the selected PLC input/output module to be tested from a human-computer interface terminal;
    comparing the read model data information of the PLC input/output module with the model data information of the PLC input/output module selected and tested on the human-computer interface terminal to obtain a first comparison result;
    if the first comparison result is consistent, applying a working voltage to the corresponding power supply terminal of the PLC input/output module according to the type of the PLC input/output module, and executing the following steps according to the type of the PLC input/output module:
    when the PLC input/output module is a digital input module,
    sequentially inputting direct-current voltage signals of a first given numerical value to corresponding terminals of each channel of the PLC input module, and reading the numerical value of each channel of an input address mapping area of the PLC input module; comparing the read numerical value of each channel with the first given numerical value to obtain a second comparison result; if the second comparison result is consistent, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
    when the PLC input/output module is a digital quantity output module,
    sequentially inputting a second given numerical value in an output address mapping area of the PLC output module, and reading output voltage values of terminals corresponding to channels of the PLC output module; if the PLC output module only has output end voltage in one channel, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
    when the PLC input/output module is an analog input module,
    sequentially inputting given signals to corresponding terminals of each channel of the PLC input module, and reading numerical values of each channel of the input address mapping area; comparing the read numerical value of each channel with the corresponding numerical value of the given signal to obtain a third comparison result; if the third comparison result is within the module error range, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
    when the PLC input/output module is an analog output module,
    sequentially inputting a third given numerical value in an output address mapping area of the PLC output module, and reading a voltage/current signal output by a corresponding terminal of each channel of the PLC output module; if the PLC output module only outputs a voltage/current signal in one channel and the voltage/current signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
    and if the first comparison result is inconsistent, terminating the detection.
  2. 2. The method for detecting the PLC input/output module according to claim 1, wherein when the PLC input/output module is an analog input module, the sequentially inputting the given signal to the corresponding terminal of each channel of the PLC input module includes:
    when the PLC input/output module is a voltage type analog input module, sequentially inputting a direct-current voltage given signal with a preset numerical value into each channel of the voltage type analog input module;
    when the PLC input/output module is a current type analog input module, sequentially inputting a direct current given signal with a preset numerical value into each channel of the current type analog input module;
    when the PLC input/output module is a thermal resistor type analog input module, resistors with preset resistance values are sequentially connected to each channel of the thermal resistor type analog input module;
    when the PLC input/output module is a thermocouple type analog input module, direct-current millivolt signals with preset values are sequentially input into each channel of the thermocouple type analog input module.
  3. 3. The method for detecting the PLC input/output module according to claim 1, wherein if the PLC input/output module is a safety module, and if the first comparison result is consistent, after an operating voltage is applied to a power supply terminal of the PLC input/output module according to the type of the PLC input/output module, the method comprises:
    and running a passivation program to confirm that the PLC input and output module is in a normal state, and continuously executing the safety program of the PLC input and output module.
  4. 4. The PLC input-output module detection method according to claim 1, further comprising:
    and storing the detection result of the PLC input and output module and generating a detection report.
  5. A PLC input/output module detection device (200), comprising:
    the information acquisition module (210) is used for reading the model data information of the PLC input/output module to be tested and receiving the model data information of the selected PLC input/output module to be tested from a human-computer interface terminal (120);
    the comparison module (220) is used for comparing the read model data information of the PLC input/output module with the model data information of the tested PLC input/output module selected on the human-computer interface terminal (120) to obtain a first comparison result;
    a first processing module (230) for applying a working voltage to a power supply terminal of the PLC input/output module corresponding to the type of the PLC input/output module if the first comparison result is consistent; and if the first comparison result is inconsistent, terminating the detection;
    the second processing module (240) is used for sequentially inputting direct current voltage signals of a first given numerical value at corresponding terminals of each channel of the PLC input module when the input/output module is a digital quantity input module, and reading the numerical value of each channel of an input address mapping area of the PLC input module; comparing the read numerical value of each channel with the first given numerical value to obtain a second comparison result; if the second comparison result is consistent, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
    when the input/output module is a digital quantity output module, sequentially inputting a second given numerical value in an output address mapping area of the PLC output module, and detecting output voltage values of terminals corresponding to channels of the PLC output module; if the PLC output module only has output end voltage in one channel, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module;
    when the input/output module is an analog input module, given signals are sequentially input to corresponding terminals of each channel of the PLC input module, and numerical values of each channel of the input address mapping area are read; comparing the read numerical value of each channel with the corresponding given numerical value of the given signal to obtain a third comparison result; if the third comparison result is within the module error range, judging that the channel of the PLC input module is normal; otherwise, judging the channel fault of the PLC input module;
    when the PLC input/output module is an analog output module, sequentially inputting a third given numerical value in an output address mapping area of the PLC output module, and reading output voltage/current signals of terminals corresponding to channels of the PLC output module; if the PLC output module only outputs a voltage/current signal at one channel terminal and the voltage/current signal is within a module error range, judging that the channel of the PLC output module is normal; otherwise, judging the channel fault of the PLC output module.
  6. 6. The PLC input/output module detection apparatus (200) of claim 5, wherein the second processing module (240) is further configured to:
    when the PLC input/output module is a voltage type analog input module, given signals of direct current voltage with preset values are sequentially input to corresponding terminals of each channel of the voltage type analog input module;
    when the PLC input/output module is a current type analog input module, given signals of direct current with preset values are sequentially input to corresponding terminals of each channel of the current type analog input module;
    when the PLC input/output module is a thermal resistor type analog input module, the corresponding terminals of each channel of the thermal resistor type analog input module are sequentially connected with resistors with preset resistance values;
    when the PLC input/output module is a thermocouple type analog input module, direct-current millivolt given signals with preset values are sequentially input to corresponding terminals of each channel of the thermocouple type analog input module.
  7. 7. The PLC input-output module detection apparatus (200) of claim 5, further comprising:
    and the blunt removing module (250) is used for running a blunt removing program when the PLC input and output module is a safety module so as to confirm that the state of the PLC input and output module is normal and continuously executing the safety program of the PLC input and output module.
  8. 8. The PLC input-output module detection apparatus (200) of claim 5, further comprising:
    and the storage module (260) is used for storing the detection result of the PLC input and output module and generating a detection report.
  9. A PLC input/output module detection apparatus (300), comprising: at least one memory (301), at least one processor (302), wherein: the at least one memory (301) for storing program instructions;
    the at least one processor (302) configured to invoke program instructions stored in the at least one memory to perform the PLC input-output module detection method of any of claims 1 to 4.
  10. 10. A computer readable storage medium having stored thereon program instructions; characterized in that the program instructions are executable by a processor and implement the PLC i/o module detection method according to any one of claims 1 to 4.
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