CN111580497A - Programmable logic controller input/output port testing equipment and method - Google Patents
Programmable logic controller input/output port testing equipment and method Download PDFInfo
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- CN111580497A CN111580497A CN202010371309.7A CN202010371309A CN111580497A CN 111580497 A CN111580497 A CN 111580497A CN 202010371309 A CN202010371309 A CN 202010371309A CN 111580497 A CN111580497 A CN 111580497A
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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
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
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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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
The invention discloses a PLC input/output port test device, which is provided with N digital quantity input ports and N digital quantity output ports; the N digital input port pins are respectively connected with the high level of the power supply through a normally open non-self-locking key switch; the pins of the N digital quantity output ports are grounded through an indicator lamp respectively; the relay is provided with N normally open switch contacts; the coil of the relay is connected between the first digital output port DO1 pin and the ground; and a normally open switch contact of the relay is respectively connected between the pin of the ith digital quantity input port DI [ i ] and the pin of the ground i digital quantity output port DO [ i ] in series. The invention also discloses a test method of the PLC input/output port test equipment. The invention is convenient for repeatedly testing the input and output ports of the PLC for a long time and is suitable for detecting and debugging the input and output interfaces of the PLC in large batches.
Description
Technical Field
The invention relates to a PLC (programmable logic controller) testing technology, in particular to a programmable logic controller input/output port testing device and a method.
Background
A PLC (programmable logic controller) has been widely used in the field of industrial control, and whether a problem exists in a PLC input/output port (IO) is a concern of many factories, whether an input pin can correctly read a high/low level, whether an output pin can be normally switched on/off, and whether a PLC product is qualified. The current common test method is that a digital quantity input (DI) pin is connected with a switch to a power supply, a digital quantity output (DO) pin is connected with an indicator light, the level of the corresponding DI pin is read through a test program, and then the level is mapped to the DO pin, so that the corresponding indicator light can be turned on or off by turning the switch on or off, and whether the DI pin and the DO pin are normal or not is verified.
The detection means needs manual IO detection one by one, if the number of the PLCs is large, a large amount of time cost is needed, and long-time repeated testing is difficult, so that the method is only suitable for small-batch detection debugging.
Disclosure of Invention
The invention aims to solve the technical problem of facilitating the repeated testing of the input and output ports of the programmable logic controller for a long time and is suitable for the detection and debugging of the input and output interfaces of the large-batch programmable logic controller.
In order to solve the above technical problem, the present invention provides an input/output port test device for a programmable logic controller, wherein the programmable logic controller has N digital input ports DI [1], DI [2], … …, DI [ N ], and N digital output ports DO [1], DO [2], … …, DO [ N ]; the N digital input port pins are respectively connected with the high level of the power supply through a normally open non-self-locking key switch;
the pins of the N digital quantity output ports are grounded through an indicator lamp respectively;
the relay is provided with N normally open switch contacts;
the coil of the relay is connected between the first digital output port DO1 pin and the ground;
a normally open switch contact of the relay is respectively connected in series between the pin of the ith digital quantity input port DI [ i ] and the pin of the ground i digital quantity output port DO [ i ];
n is a positive integer, and i is a positive integer less than or equal to N.
Preferably, the number of the relays is two, and the two relays are provided with N normally open switch contacts;
the coils of the two relays are coupled in parallel between the first digital output port DO [1] pin and ground.
Preferably, N is 8;
the two relays each have 4 normally open switch contacts.
Preferably, the power high level is 24V.
In order to solve the technical problem, the testing method of the input/output port testing equipment of the programmable logic controller provided by the invention is characterized in that positive and negative pins of a power supply of the programmable logic controller are respectively connected with positive and negative electrodes of the power supply, a testing program is programmed into the programmable logic controller, and the testing program is operated;
the test program enables DO [ i ] and DI [ i ] to be in the same state in a manual mode;
pressing the button of the normally open non-self-locking button switch which is connected with the DI [ i ], if the indicator lamp connected with the DO [ i ] is lightened and the button is released, the indicator lamp is extinguished, and the DI [ i ] and the DO [ i ] are normal; otherwise, DI [ i ] or DO [ i ] has a problem.
Preferably, the test program controls to make DO [1] output high level all the time in the automatic mode, drives the relay to close the contact, and makes the pins of each corresponding DO [ i ] and DI [ i ] short-circuited; then, setting DO 2-DO 8 high level in turn, that is, making one digital output port DO j in DO 2-DO N high level each time, keeping other digital output ports low level; after one digital output port DO [ j ] in DO [2] to DO [ N ] is set to be high level, delaying a first set time to read the state of a corresponding digital input port DI [ j ], if the state of DI [ j ] is consistent with that of DO [ j ], enabling the next digital output pin in DO [2] to DO [ N ] to be high level to carry out the next circulation, otherwise, entering into the dead circulation and not changing the state of DO [2] to DO [ N ];
j is an integer greater than 1 and less than or equal to N;
in automatic mode, if the indicator light status stops changing, there is an abnormal pin in the DI or DO;
in the automatic mode, if the indicator lamp connected to DO1 is always on, and the other indicator lamps are sequentially turned on and off and are in the running horse lamp state, the pins of each digital input port DI and each digital output port DO are normal.
Preferably, the first set time is 8ms to 12 ms.
Preferably, in the automatic mode, if the indicator light connected to DO [1] is always on and the indicator light connected to DO [ j ] is always on, the pins of the digital output ports DO are normal and DI [ j ] has a problem.
Preferably, in the automatic mode, if the indicator light connected to DO [1] is always on and all other indicator lights are off, there is a problem with at least one digital output port DO pin.
Preferably, the test program is initialized to a manual mode.
Preferably, after the test program enters the manual test mode, the state of DI [ i ] is read cyclically and assigned to DO [ i ], and if DI [1] and DI [ j ] are simultaneously high and continuously exceed the second set time, the automatic test mode is entered.
Preferably, the second set time is 3 seconds.
The invention relates to a programmable logic controller input/output interface test device, wherein each digital input interface DI is respectively connected with a normally open non-self-locking key switch, each digital output interface DO is respectively connected with an indicator light, each digital input interface DI and each digital output interface DO are respectively connected with a normally open contact of a relay one by one, and the relay is controlled by a first digital output interface DO [1 ]. The input and output interface test equipment of the programmable logic controller is convenient for repeated test for a long time and is suitable for detecting and debugging the input and output interfaces of the large-batch programmable logic controller.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an input/output port test apparatus of a programmable logic controller according to the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood 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.
Example one
As shown in FIG. 1, a Programmable Logic Controller (PLC) input/output port (IO) test apparatus, the PLC having N digital input ports DI [1], DI [2], … …, DI [ N ], and N digital output ports DO [1], DO [2], … …, DO [ N ];
the N digital input port pins are respectively connected with the high level of the power supply through a normally open non-self-locking key switch;
the pins of the N digital quantity output ports are grounded through an indicator lamp respectively;
the relay is provided with N normally open switch contacts;
the coil of the relay is connected between the first digital output port DO1 pin and the ground;
a normally open switch contact of the relay is respectively connected in series between the pin of the ith digital quantity input port DI [ i ] and the pin of the ground i digital quantity output port DO [ i ];
n is a positive integer, and i is a positive integer less than or equal to N.
In the testing apparatus for input/output interfaces of a programmable logic controller according to the first embodiment, each digital input interface DI is connected to a normally open non-self-locking key switch, each digital output interface DO is connected to an indicator light, each digital input interface DI and each digital output interface DO are connected to each other through normally open contacts of a relay, and the relay is controlled by the first digital output interface DO [1 ]. The input and output interface test equipment for the programmable logic controller is convenient for repeatedly testing the input and output ports of the programmable logic controller for a long time, and is suitable for detecting and debugging the input and output interfaces of the large-scale programmable logic controller.
Example two
According to the input/output port (IO) test equipment of the Programmable Logic Controller (PLC) in the first embodiment, two relays are provided, and the two relays are provided with N normally open switch contacts;
the coils of the two relays K1, K2 are connected in parallel between ground and the first digital output pin DO 1.
Preferably, N is 8.
Preferably, the two relays each have 4 normally open switch contacts.
Preferably, the power high level is 24V.
EXAMPLE III
According to the test method of the input/output port test equipment of the programmable logic controller, the positive pin and the negative pin of the power supply of the programmable logic controller are respectively connected with the positive pin and the negative pin of the power supply, a test program is programmed into the programmable logic controller, and the test program is operated;
the test program enables DO [ i ] and DI [ i ] to be in the same state in a manual mode;
pressing the button of the normally open non-self-locking button switch which is connected with the DI [ i ], if the indicator lamp connected with the DO [ i ] is lightened and the button is released, the indicator lamp is extinguished, and the DI [ i ] and the DO [ i ] are normal; otherwise, DI [ i ] or DO [ i ] has a problem.
In the test method for the input/output port test equipment of the programmable logic controller according to the third embodiment, the test program can test the quality of the input/output port IO of the programmable logic controller in the manual mode, and the test program does not need to be accessed to a computer during normal operation, so that the production and debugging are convenient, and the test cost is saved.
Example four
According to the test method of the input/output port test equipment of the programmable logic controller based on the third embodiment, in the automatic mode, the test program controls to enable the DO [1] to always output high level, drives the relay to close the contact of the relay, and enables the pins of the corresponding DO [ i ] and the DI [ i ] to be in short circuit; then, setting DO 2-DO 8 high level in turn, that is, making one digital output port DO j in DO 2-DO N high level each time, keeping other digital output ports low level; after one digital output port DO [ j ] in DO [2] to DO [ N ] is set to be high level, delaying a first set time to read the state of a corresponding digital input port DI [ j ], if the state of DI [ j ] is consistent with that of DO [ j ], enabling the next digital output pin in DO [2] to DO [ N ] to be high level to carry out the next circulation, otherwise, entering into the dead circulation and not changing the state of DO [2] to DO [ N ];
j is an integer greater than 1 and less than or equal to N;
in automatic mode, if the indicator light status stops changing, there is an abnormal pin in the DI or DO;
in the automatic mode, if the indicator lamp connected to DO1 is always on, and the rest indicator lamps are turned off after being sequentially turned on and are in the horse race lamp state, the pins of each digital input port DI and each digital output port DO are normal.
Preferably, the first set time is 8ms to 12ms (e.g., 10 ms).
Preferably, in the automatic mode, if the indicator light connected to DO [1] is always on and the indicator light connected to DO [ j ] is always on, the pins of the digital output ports DO are normal and DI [ j ] has a problem.
Preferably, in the automatic mode, if the indicator light connected to DO [1] is always on and all other indicator lights are off, there is a problem with at least one digital output port DO pin.
In the test method of the input/output port test device of the programmable logic controller of the third embodiment, the test program controls to make DO [1] output high level all the time in the automatic mode, drives the relay to close the contact, and makes each digital input interface DI and each digital output interface DO be connected together one by one respectively; then, setting DO 2-DO N at high level in sequence; and delaying the first set time to read the state of a corresponding digital quantity input port DI [ j ] after one digital quantity output port DO [ j ] in DO [2] to DO [ N ] is at a high level, if the state of DI [ j ] is consistent with that of DO [ j ], enabling the next digital quantity output pin in DO [2] to DO [ N ] to be at a high level for the next cycle, and otherwise, entering a dead cycle and not changing the state of DO [2] to DO [ N ] any more, and indicating the state of the lamp is not changed any more. In automatic mode, if the indicator light status stops changing, there is an abnormal pin in the DI or DO; if the indicator lamp connected with DO1 is always on, and the rest indicator lamps are turned off after being sequentially turned on and are in a horse race lamp state, the pins of each digital input port DI and each digital output port DO are normal. The stability of the programmable logic controller can be tested by running the test program in an automatic mode for a long time.
Example four
In the test method of the input/output port test device of the programmable logic controller according to the third embodiment, the test mode is a manual mode during initialization of the test program.
In the test method for the input/output port test device of the programmable logic controller according to the fourth embodiment, in the automatic mode, the test program is restarted or power is applied again to return to the manual mode.
EXAMPLE five
Based on the programmable logic controller testing method of the fourth embodiment, after the testing program enters the manual testing mode, the state of DI [ i ] is read circularly and assigned to DO [ i ], and if DI [1] and DI [ j ] are simultaneously high level and continuously exceed the second set time, the automatic testing mode is entered.
Preferably, the second set time is 3 seconds.
In the test method for a programmable logic controller according to the fifth embodiment, if the button of the first normally open non-self-locking type keyswitch S1 and the button of the eighth normally open non-self-locking type keyswitch S8 are pressed simultaneously and kept for more than the second set time in the manual mode, the test program enters the automatic test mode. If the first indicator light is not on in the automatic mode, it indicates that the DO [1] output is abnormal or the programmable logic controller is restarted (possibly because of downtime or unstable power supply) to enter a default manual mode, at this time, whether the mode is in the manual mode can be judged by pressing other normally-open non-self-locking key switches, that is, the DO [1] output is abnormal or the programmable logic controller is restarted.
The input and output interface test equipment of the programmable logic controller not only can manually detect and debug a specific input and output port of the programmable logic controller, but also can be switched to an automatic mode, and one key starts all the input and output ports to test, and can continuously and circularly run to test the stability of the programmable logic controller.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A programmable logic controller input/output port test apparatus, the programmable logic controller has N digital input ports DI [1], DI [2], … …, DI [ N ], and N digital output ports DO [1], DO [2], … …, DO [ N ]; the digital quantity input device is characterized in that N digital quantity input port pins are respectively connected with a high level of a power supply through a normally open non-self-locking key switch;
the pins of the N digital quantity output ports are grounded through an indicator lamp respectively;
the relay is provided with N normally open switch contacts;
the coil of the relay is connected between the first digital output port DO1 pin and the ground;
a normally open switch contact of the relay is respectively connected in series between the pin of the ith digital quantity input port DI [ i ] and the pin of the ground i digital quantity output port DO [ i ];
n is a positive integer, and i is a positive integer less than or equal to N.
2. The programmable logic controller input-output port test apparatus of claim 1,
the number of the relays is two, and the two relays are provided with N normally open switch contacts;
the coils of the two relays are coupled in parallel between the first digital output port DO [1] pin and ground.
3. The programmable logic controller input-output port test apparatus of claim 2,
n is 8;
the two relays each have 4 normally open switch contacts.
4. The programmable logic controller input-output port test apparatus of claim 1,
the power high level is 24V.
5. The method for testing the input/output port test equipment of the programmable logic controller according to claim 1, wherein positive and negative pins of a power supply of the programmable logic controller are respectively connected with positive and negative electrodes of the power supply, a test program is programmed into the programmable logic controller, and the test program is run;
the test program enables DO [ i ] and DI [ i ] to be in the same state in a manual mode;
pressing the button of the normally open non-self-locking button switch which is connected with the DI [ i ], if the indicator lamp connected with the DO [ i ] is lightened and the button is released, the indicator lamp is extinguished, and the DI [ i ] and the DO [ i ] are normal; otherwise, DI [ i ] or DO [ i ] has a problem.
6. The programmable logic controller input-output port testing method of claim 5,
the test program controls to enable the DO [1] to always output high level in an automatic mode, drives the relay to close the contact of the relay, and enables the pins of the corresponding DO [ i ] and DI [ i ] to be in short circuit; then, setting DO 2-DO 8 high level in turn, that is, making one digital output port DO j in DO 2-DO N high level each time, keeping other digital output ports low level; after one digital output port DO [ j ] in DO [2] to DO [ N ] is set to be high level, delaying a first set time to read the state of a corresponding digital input port DI [ j ], if the state of DI [ j ] is consistent with that of DO [ j ], enabling the next digital output pin in DO [2] to DO [ N ] to be high level to carry out the next circulation, otherwise, entering into the dead circulation and not changing the state of DO [2] to DO [ N ];
j is an integer greater than 1 and less than or equal to N;
in automatic mode, if the indicator light status stops changing, there is an abnormal pin in the DI or DO;
in the automatic mode, if the indicator lamp connected to DO1 is always on, and the other indicator lamps are sequentially turned on and off and are in the running horse lamp state, the pins of each digital input port DI and each digital output port DO are normal.
7. The programmable logic controller input-output port testing method of claim 6,
the first set time is 8ms to 12 ms.
8. The programmable logic controller input-output port testing method of claim 6,
in the automatic mode, if the indicator lamp connected to DO [1] is always on and the indicator lamp connected to DO [ j ] is always on, the pins of each digital output port DO are normal and DI [ j ] has a problem.
9. The programmable logic controller input-output port testing method of claim 6,
in the automatic mode, if the indicator lamp connected to DO1 is always on and all other indicator lamps are off, there is a problem with at least one digital output port DO pin.
10. The programmable logic controller input-output port testing method of claim 8,
and the test program is initialized to be in a manual mode.
11. The programmable logic controller input-output port testing method of claim 10,
and after the test program enters a manual test mode, circularly reading the state of the DI [ i ] and assigning the state to the DO [ i ], and if DI [1] and DI [ j ] are simultaneously high level and continuously exceed a second set time, entering an automatic test mode.
12. The programmable logic controller input-output port testing method of claim 11,
the second set time is 3 seconds.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904112A (en) * | 2021-01-18 | 2021-06-04 | 深圳市科创奇科技有限公司 | Test system and test method of scooter controller |
| CN113534732A (en) * | 2021-07-16 | 2021-10-22 | 上海海得控制系统股份有限公司 | Detection method, medium, PLC and system for DI module and DO module |
| CN114137877A (en) * | 2021-11-29 | 2022-03-04 | 中车长春轨道客车股份有限公司 | Subway vehicle input and output module testing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910008917B1 (en) * | 1989-07-27 | 1991-10-24 | 현대전자산업 주식회사 | P.l.c. detective system |
| CN101523317A (en) * | 2006-08-08 | 2009-09-02 | 西门子能量及自动化公司 | Devices, systems, and methods regarding a PLC system fault |
| CN102253300A (en) * | 2011-04-18 | 2011-11-23 | 宁夏巨能机器人系统有限公司 | Electric cabinet detector of numerical control machine |
| JP2014106720A (en) * | 2012-11-27 | 2014-06-09 | Toshiba Mitsubishi-Electric Industrial System Corp | Testing device for programmable controller |
| CN104571085A (en) * | 2014-12-18 | 2015-04-29 | 重庆川仪自动化股份有限公司 | Method for automatically testing on-off input and on-off output of light rail door control system |
| CN105182966A (en) * | 2015-09-16 | 2015-12-23 | 华锐风电科技(集团)股份有限公司 | Detection method of PLC and IO extension module |
-
2020
- 2020-05-06 CN CN202010371309.7A patent/CN111580497A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910008917B1 (en) * | 1989-07-27 | 1991-10-24 | 현대전자산업 주식회사 | P.l.c. detective system |
| CN101523317A (en) * | 2006-08-08 | 2009-09-02 | 西门子能量及自动化公司 | Devices, systems, and methods regarding a PLC system fault |
| CN102253300A (en) * | 2011-04-18 | 2011-11-23 | 宁夏巨能机器人系统有限公司 | Electric cabinet detector of numerical control machine |
| JP2014106720A (en) * | 2012-11-27 | 2014-06-09 | Toshiba Mitsubishi-Electric Industrial System Corp | Testing device for programmable controller |
| CN104571085A (en) * | 2014-12-18 | 2015-04-29 | 重庆川仪自动化股份有限公司 | Method for automatically testing on-off input and on-off output of light rail door control system |
| CN105182966A (en) * | 2015-09-16 | 2015-12-23 | 华锐风电科技(集团)股份有限公司 | Detection method of PLC and IO extension module |
Non-Patent Citations (1)
| Title |
|---|
| 顾战松，等: "《可编程控制器原理与应用》", 31 December 1996 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904112A (en) * | 2021-01-18 | 2021-06-04 | 深圳市科创奇科技有限公司 | Test system and test method of scooter controller |
| CN113534732A (en) * | 2021-07-16 | 2021-10-22 | 上海海得控制系统股份有限公司 | Detection method, medium, PLC and system for DI module and DO module |
| CN114137877A (en) * | 2021-11-29 | 2022-03-04 | 中车长春轨道客车股份有限公司 | Subway vehicle input and output module testing method |
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Application publication date: 20200825 |
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| RJ01 | Rejection of invention patent application after publication |