CN114371672A - DCS response time testing system - Google Patents
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- 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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
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- G—PHYSICS
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- 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
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Abstract
The embodiment of the invention discloses a DCS response time testing system, which comprises: the device comprises an input signal generating circuit, an output signal collecting circuit and signal detecting equipment; the input signal produces the return circuit and is connected with the AI fastener of DCS system, the input signal produces the return circuit and includes: the signal source is used for generating a signal and the first resistor; the output signal acquisition loop is connected with the AO fastener or the DO fastener of DCS system, the output signal acquisition loop includes: a second resistor; the signal detection device is used for detecting the voltages on two sides of the first resistor to obtain a first voltage signal, detecting the voltages on two sides of the second resistor to obtain a second voltage signal, and determining the response time of the DCS according to the first voltage signal and the second voltage signal. The invention provides a scheme for accurately and conveniently detecting the response time of the DCS.
Description
Technical Field
The invention relates to the technical field of DCS systems, in particular to a DCS system response time testing system.
Background
The distributed control system is called DCS for short, and can also be translated into a distributed control system. The method adopts the basic design idea of controlling dispersion, operation and management centralization and adopts a structural form of multilayer grading, cooperation and autonomy. Its main features are its centralized management and decentralized control. DCS has been widely used in various industries such as electric power, metallurgy, and petrochemical industry.
The DCS controls each link of the whole process, ranging from a small one to a single on-site instrument to a large one, such as a steam turbine of a thermal power plant. Therefore, the stability and reliability of DCS are improved, and the operation safety of the technological process is directly influenced. Response time is an important index of the DCS system, but the response time of the DCS system cannot be checked from inside due to the fact that the respective technologies of the DCS systems manufactured by various manufacturers are confidential, and therefore accurate detection of the response time of the DCS system is difficult at present.
Therefore, how to accurately and conveniently detect the response time of the DCS is a technical problem which needs to be solved in the field.
Disclosure of Invention
The invention provides a DCS response time testing system for accurately and conveniently detecting the response time of a DCS.
In order to achieve the above object, according to an aspect of the present invention, there is provided a DCS system response time test system, the system including: the device comprises an input signal generating circuit, an output signal collecting circuit and signal detecting equipment;
the input signal produces the return circuit and is connected with the AI fastener of DCS system, the input signal produces the return circuit and includes: the signal source is used for generating a signal and the first resistor;
the output signal acquisition loop is connected with the AO fastener or the DO fastener of DCS system, the output signal acquisition loop includes: a second resistor;
the signal detection device is used for detecting the voltages on two sides of the first resistor to obtain a first voltage signal, detecting the voltages on two sides of the second resistor to obtain a second voltage signal, and determining the response time of the DCS according to the first voltage signal and the second voltage signal.
Optionally, the signal detection device is specifically configured to determine an input signal trigger time according to the first voltage signal, determine an output signal response time according to the second voltage signal, and subtract the input signal trigger time from the output signal response time to obtain a response time of the DCS system.
Optionally, a power supply is disposed on the input signal generating circuit or the input signal generating circuit is connected to a power supply in the DCS system.
Optionally, a power supply is arranged on the output signal acquisition loop or the output signal acquisition loop is connected with the power supply in the DCS system.
Optionally, the signal source is configured to generate a pulse signal.
In order to achieve the above object, according to another aspect of the present invention, there is also provided another DCS system response time test system, including:
the device comprises an input signal generating circuit, an output signal collecting circuit and signal detecting equipment;
the input signal generating circuit is connected with a DI card of a DCS system, and comprises: the trigger circuit is used for controlling the on-off of the switch to generate an on-off signal;
the output signal acquisition loop is connected with the AO fastener or the DO fastener of DCS system, the output signal acquisition loop includes: a second resistor;
the signal detection device is used for detecting voltages on two sides of the switch to obtain a first voltage signal, detecting voltages on two sides of the second resistor to obtain a second voltage signal, and determining the response time of the DCS according to the first voltage signal and the second voltage signal.
Optionally, the switch is a high-speed thyristor switching device.
The invention has the beneficial effects that:
according to the embodiment of the invention, the input signal is generated by the input signal generating circuit and is input to the input end (AI card or DI card) of the DCS, the output of the output end (AO or DO) of the DCS is collected by the output signal collecting circuit, the signal is detected according to the signal detection equipment, the response time of the DCS is determined according to the detected signal, and the technical effect of accurately and conveniently detecting the response time of the DCS is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of a DCS response time testing system according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a DCS response time testing system according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a DCS response time testing system according to a third embodiment of the present invention;
FIG. 4 is a signal diagram illustrating an exemplary operation period of 20ms according to the present invention;
FIG. 5 is a signal diagram illustrating an exemplary 100ms computing cycle;
FIG. 6 is a signal diagram illustrating an exemplary operation period of 400ms according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It is to be understood that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of the invention and the above-described drawings are intended to cover non-exclusive inclusions.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The DCS system response time testing system comprises: the device comprises an input signal generating circuit, an output signal collecting circuit and signal detecting equipment.
The DCS system includes: AI fastener, AO fastener, DI fastener and DO fastener.
The AI card is an AI analog input card used for converting the analog quantity of the controlled object into a digital signal which can be identified by a computer.
The AO card is an AO analog output card used for converting the output digital signal of the computer into an analog signal which can be accepted by an external process control instrument or device.
The DI card is a DI digital value input card and is used for converting switching value signals with only two states in the production process into a signal form which can be identified by a computer.
The DO card is a DO digital output card and is used for converting a switching value signal represented by a binary code output by a computer into a switching value signal capable of controlling or displaying the state of the production process.
Fig. 1 is a schematic diagram of a DCS system response time test system according to a first embodiment of the present invention, in which a dotted line portion in fig. 1 is a DCS original system, as shown in fig. 1, in one embodiment of the present invention, an input signal generating circuit is connected to an AI card, and the input signal generating circuit is used for generating a signal and sending the generated signal to the AI card. As shown in fig. 1, the input signal generating circuit specifically includes: a signal source and a first resistor R1. As shown in fig. 1, in an embodiment of the present invention, the output signal acquisition circuit is connected to an AO card of the DCS system for receiving a signal output by the AO card. As shown in fig. 1, the output signal acquisition circuit includes: and a second resistor R2. As shown in fig. 1, the signal detection device G1 is configured to detect a voltage across the first resistor R1 to obtain a first voltage signal CH1, detect a voltage across the second resistor R2 to obtain a second voltage signal CH2, and determine a response time of the DCS system according to the first voltage signal CH1 and the second voltage signal CH 2.
In an optional embodiment of the present invention, a power supply is disposed on the input signal generating circuit or the input signal generating circuit is connected to a power supply in the DCS system (i.e., the input signal generating circuit may use a power supply inside the DCS system or a power supply outside the DCS system). The output signal acquisition loop is provided with a power supply or is connected with a power supply in the DCS (namely, the output signal acquisition loop can adopt an internal power supply of the DCS or an external power supply of the DCS). In the embodiment of fig. 1, a power supply is arranged on the input signal generating circuit, and the output signal collecting circuit is connected with the power supply in the DCS system. The scheme of connecting the input signal generating loop with the power supply in the DCS system can be shown in fig. 2, and the scheme of setting the power supply on the output signal collecting loop can be shown in fig. 3.
In an embodiment of the present invention, the signal detection device G1 is specifically configured to determine an input signal trigger time according to the first voltage signal CH1, determine an output signal response time according to the second voltage signal CH2, and subtract the input signal trigger time from the output signal response time to obtain a response time of the DCS system. In one embodiment of the invention, the signal source generates a pulse signal to better determine the input signal trigger time from CH1 and the output signal response time from CH 2.
As shown in FIG. 1, the invention adopts a channel of an analog input card AI introduced from a DCS system (in the embodiment of FIG. 1, an AI channel external power supply mode is adopted, DC is a constant current source, if AI is a voltage type, DC can be replaced by a constant voltage source, similarly, a DCS system internal power supply mode can be adopted for connection, and only the wiring mode of an input signal generating loop and the signal source power supply mode need to be changed); and the other channel of the analog output card AO is adopted (in the embodiment of fig. 1, the power supply mode in the DCS system of AO is adopted, namely DC1 is a constant current source in the DCS system, and if AO outputs a voltage signal, DC1 is a constant voltage source). The data interaction between the AI and the AO is realized through the algorithm connection inside the DCS system.
In one embodiment of the present invention, AI channel detection is divided into current and voltage detection, which is generally widely adopted as current detection, i.e. detection current is 4-20mA (4mA corresponds to 0% of range, and 20mA corresponds to 100%). In order to increase the sensitivity, anti-interference capability and reliability of detection, a direct current power supply (generally 1V-2V) needs to be added to the input signal generating loop. The signal source in the input signal generating circuit adopts high-precision pulse signals or sine wave signals with adjustable frequency (pulse signals are preferably adopted for detecting the response time of the DCS system, and the stability of the DCS system signals and the reproduction characteristics of input and output signals are detected). Meanwhile, a first resistor R1 is arranged in the input signal generating loop in series (the specific resistance value is 100-500 omega, and the specific resistance value is converted into a voltage signal according to the current 4-20mA, and the specific voltage value can be obtained by using the ohm's law U-IR1Obtained).
In one embodiment of the present invention, the AO channel detection is divided into current and voltage detection, which is generally widely adopted as current detection, i.e. the detection current is 4-20mA (4mA corresponds to 0% of range, and 20mA corresponds to 100%). In the embodiment of fig. 1, a DCS internal power supply mode is adopted, an AO channel outputs a 4-20mA constant current source, a second resistor R2 is connected in series and converted into a voltage detection signal (the specific resistance value is 100-500 omega, and the voltage detection signal is converted into a voltage signal according to the current 4-20mAThe specific voltage value can be determined by ohm's law U ═ IR2Obtained).
In an embodiment of the invention, G1 is a high-speed signal detection device, the signal resolution is within 0.0005s, the operation period is between 20ms and 500ms according to a common DCS system, and the signal resolution according to Shannon's sampling theorem G1 can meet the requirement. One channel CH1 of G1 is connected to both ends of R1, i.e., the signal input side; the other channel CH2 is connected to both ends of R2, i.e., the signal output side. By detecting the signal waveforms at the two ends of R1 and R2 and analyzing the waveforms, the input signal triggering time is analyzed and determined from CH1, the output signal response time is analyzed and determined from CH2, and the time difference between the input signal triggering time and the output signal response time is the response time of the DCS.
Fig. 2 is a schematic diagram of a response time testing system of a DCS system according to a second embodiment of the present invention, and a dotted line portion in fig. 2 is a DCS original system, as shown in fig. 2. Because of the input switching value signal (i.e. on-off signal) of the DI card, in the embodiment of fig. 2, the input signal generating circuit specifically includes: the trigger circuit is used for controlling the on-off of the switch T1 to generate an on-off signal. In the embodiment of fig. 2, the output signal acquisition circuit is connected with an AO card of the DCS system and is configured to receive a signal output by the AO card. As shown in fig. 2, the output signal acquisition circuit includes: and a second resistor R2. As shown in fig. 2, the signal detection device G1 is configured to detect a voltage across the switch T1 to obtain a first voltage signal CH1, detect a voltage across the second resistor R2 to obtain a second voltage signal CH2, and determine a response time of the DCS system according to the first voltage signal CH1 and the second voltage signal CH 2.
In an optional embodiment of the present invention, a power supply is disposed on the input signal generating circuit or the input signal generating circuit is connected to a power supply in the DCS system (i.e., the input signal generating circuit may use a power supply inside the DCS system or a power supply outside the DCS system). The output signal acquisition loop is provided with a power supply or is connected with a power supply in the DCS (namely, the output signal acquisition loop can adopt an internal power supply of the DCS or an external power supply of the DCS). In the embodiment of fig. 2, the scheme that the input signal generating circuit is connected with the power supply in the DCS system, and the output signal collecting circuit is connected with the power supply in the DCS system is adopted.
As shown in fig. 2, the DI signal is a voltage signal and is a type of power supply inside the DCS system, and the input signal generating circuit generates an on-off signal to prevent the jitter problem during the on-off process of the normal switching signal and to avoid unnecessary judgment interference during the monitoring process. Therefore, the switch T1 adopts a high-speed thyristor switching device, the on-off of the switch T1 is controlled by a trigger circuit, when T1 is turned off, the voltage of CH1 is monitored to be the DC no-load voltage value of the power supply, for example, 5V, and when T1 is turned on, the voltage drop (generally small, for example, 0.1V) of the device across the switch T1 is monitored by CH 1. The moment when the voltage drops from the no-load voltage value of the power supply DC to the voltage drop of the device at the two ends of the switch T1 (namely the moment when the on-off signal appears) is the triggering moment of the input signal.
The collection of the AO clamping piece by the output signal collection circuit of the embodiment of fig. 2 is completely the same as that of the embodiment of fig. 1, and reference may be made to the embodiment of fig. 1 specifically, which is not described herein again.
In the embodiment of fig. 2, the signal detection device G1 is configured to detect a voltage across the switch T1 to obtain a first voltage signal CH1, detect a voltage across the second resistor R2 to obtain a second voltage signal CH2, and determine a response time of the DCS system according to the first voltage signal CH1 and the second voltage signal CH 2. Specifically, the signal detection device G1 analyzes the first voltage signal CH1, takes the time when the voltage in CH1 drops from the power supply DC no-load voltage value to the voltage drop across the switch T1 as the input signal trigger time T1, determines the output signal response time T2 from the second voltage signal CH2, and subtracts T1 from T2 to obtain the response time of the DCs system.
Fig. 3 is a schematic diagram of a third embodiment of the DCS system response time test system according to the present invention, and a dotted line portion in fig. 3 is a DCS original system, as shown in fig. 3, in one embodiment of the present invention, an input signal generating circuit is connected to an AI card, and the input signal generating circuit is used for generating a signal (preferably, a pulse signal) and sending the generated signal to the AI card. As shown in fig. 3, the input signal generating circuit specifically includes: a signal source and a first resistor R1. As shown in fig. 3, in this embodiment, the output signal acquisition circuit is connected to a DO card of the DCS system, and is configured to receive a signal output by the DO card, where the output of the DO card is a switching value signal (i.e., an on-off signal). As shown in fig. 3, the output signal acquisition circuit includes: and a second resistor R2. As shown in fig. 3, the signal detection device G1 is configured to detect a voltage across the first resistor R1 to obtain a first voltage signal CH1, detect a voltage across the second resistor R2 to obtain a second voltage signal CH2, and determine a response time of the DCS system according to the first voltage signal CH1 and the second voltage signal CH 2.
As shown in fig. 3, a power supply is provided in the input signal generating circuit in the embodiment of fig. 3, that is, an external power supply scheme of the DCS system is adopted, and a power supply is provided in the output signal acquiring circuit in the embodiment of fig. 3, that is, an external power supply scheme of the DCS system is adopted.
In the embodiment of fig. 3, the DO card outputs a switching value signal (i.e., an on-off signal), and the signal detection device G1 determines the occurrence time of the on-off signal in the second voltage signal CH2 as the response time of the output signal.
In the embodiment of FIG. 3, the input is the AI signal and the output is the DO signal. AI as described above. The DO adopts an external power supply mode, a CH2 channel of G1 monitors voltages at two ends of a protective resistor R2, when the AI is triggered, a DO signal is output through DCS logic operation, the DO generates an on-off signal, and the response time of the output signal can be judged by judging the voltages at two ends of R2.
In a fourth embodiment of the invention, the input signal generating circuit is connected with the DI card, and the input signal generating circuit is used for generating the on-off signal and sending the generated on-off signal to the DI card. Since the input of the DI card is a switching value signal (i.e. an on-off signal), in the embodiment of fig. 2, the input signal generating circuit specifically includes: the trigger circuit is used for controlling the on-off of the switch T1 to generate an on-off signal. The DO fastener of output signal collection return circuit and DCS system is connected for receive the signal of DO fastener output, what the DO fastener output is the switching value signal (be break-make signal), and the output signal collection return circuit includes: and a second resistor R2. In this embodiment, the signal detection device G1 is configured to detect a voltage across the switch T1 to obtain a first voltage signal CH1, detect a voltage across the second resistor R2 to obtain a second voltage signal CH2, and determine a response time of the DCS system according to the first voltage signal CH1 and the second voltage signal CH 2.
In the fourth embodiment, the input of the DI card is a switching value signal (i.e., an on-off signal), the output of the DO card is a switching value signal (i.e., an on-off signal), and the signal detection device G1 can determine that the occurrence time of the on-off signal in the first voltage signal CH1 is the input signal trigger time, and determine that the occurrence time of the on-off signal in the second voltage signal CH2 is the output signal response time.
The embodiment can solve the problem of monitoring the response time of all types of DCS systems, different types of cards in the DCS and different power supply types.
The above-described aspects of the invention are explained below with reference to specific examples.
The data and the graphs of CHl and CH2 detected under the conditions that the DPU control operation period is respectively 20ms, 100ms and 400ms are respectively set by adopting the scheme of the invention.
1. The DPU controller has a calculation period of 20 ms.
After the scheme of the embodiment of fig. 1 is switched on, the G1 detection device is started, the signal source is started to generate a pulse signal, and the recording waveform is as shown in fig. 4.
As shown in FIG. 4, CH1 is the voltage signal at the two ends of the input channel, R1, and the trigger time is t1Time of day; CH2 is a voltage signal at two ends of an output channel R2, and the time of the received signal is t2. According to Δ t ═ t2-t1A response time of 38.46ms is obtained at 38.46 ms. Namely, the full response time of DCS is 38.46ms, and Δ t is AI sampling filter time + DPU operation period time + AO output conversion time. Meanwhile, the output signal of the test can be seen to be stable after three times of step changes, and the continuity of the response change of the output signal is improvedIs poor. Meanwhile, for the test, the arithmetic mean can be carried out after a plurality of tests, and the random error is eliminated.
2. The DPU controller operation period is 100 ms.
After the scheme of the embodiment of fig. 1 is switched on, the G1 detection device is started, the signal source is started to generate a pulse signal, and the recording waveform is as shown in fig. 5.
As shown in FIG. 5, CHl is the voltage signal across the input channel, R1, with the trigger time t1Time of day; CH2 is a voltage signal at two ends of an output channel R2, and the time of the received signal is t2. According to Δ t ═ t2-t1A response time of 149.42ms is obtained of 149.42 ms. I.e. the full response time of the DCS is 149.42 ms.
And delta t is AI sampling filtering time + DPU operation period time + AO output conversion time. Meanwhile, the output signal of the test can be stable, and the continuity of the response change of the test is good. Meanwhile, for the test, the arithmetic mean can be carried out after a plurality of tests, and the random error is eliminated.
Under the condition of high-speed operation, the problem of discontinuity of the output process is obvious due to the limitation of the self hardware D/A conversion chip of AO response time; continuity improves as the signal rate decreases. Therefore, the signal detection device G1 of the present invention may further analyze the CH2 waveform to determine whether there is a step in the CH2 waveform, and if there is a step, may determine that the current operation period of the DPU controller is too short (i.e., the signal rate is too high), so as to prompt the operator to set the operation period of the DPU controller.
3. The DPU controller operation period is 400 ms.
After the scheme of the embodiment of fig. 1 is switched on, the G1 detection device is started, the signal source is started to generate a pulse signal, and the recording waveform is as shown in fig. 6.
As shown in FIG. 6, CH1 is the voltage signal at the two ends of the input channel, R1, and the trigger time is t1Time of day; CH2 is a voltage signal at two ends of an output channel R2, and the time of the received signal is t2. According to Δ t ═ t2-t1A response time of 458.75ms is obtained of 458.75 ms. I.e. the full response time of the DCS is 458.75 ms.
And delta t is AI sampling filtering time + DPU operation period time + AO output conversion time. Meanwhile, the output signal of the test can be stable, and the continuity of the response change of the test is good. Meanwhile, for the test, the arithmetic mean can be carried out after a plurality of tests, and the random error is eliminated.
The embodiment can be seen that the invention solves the problem of response time test of the DCS, and can objectively detect the response time of the system in the whole process from receiving signals, AD conversion, signal processing, logic operation, signal output and DA conversion. Thereby providing a reliable and wide test means for evaluating DCS performance indexes.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A DCS system response time test system, comprising: the device comprises an input signal generating circuit, an output signal collecting circuit and signal detecting equipment;
the input signal produces the return circuit and is connected with the AI fastener of DCS system, the input signal produces the return circuit and includes: the signal source is used for generating a signal and the first resistor;
the output signal acquisition loop is connected with the AO fastener or the DO fastener of DCS system, the output signal acquisition loop includes: a second resistor;
the signal detection device is used for detecting the voltages on two sides of the first resistor to obtain a first voltage signal, detecting the voltages on two sides of the second resistor to obtain a second voltage signal, and determining the response time of the DCS according to the first voltage signal and the second voltage signal.
2. The DCS system response time test system of claim 1, wherein the signal detection device is specifically configured to determine an input signal trigger time according to the first voltage signal, determine an output signal response time according to the second voltage signal, and subtract the input signal trigger time from the output signal response time to obtain the response time of the DCS system.
3. The DCS system response time test system of claim 1, wherein the input signal generating circuit has a power supply disposed thereon or is connected to a power supply in the DCS system.
4. The DCS system response time testing system of claim 1, wherein a power supply is provided on the output signal acquisition loop or the output signal acquisition loop is connected to a power supply in the DCS system.
5. The DCS system response time test system of claim 1, wherein the signal source is configured to generate a pulsed signal.
6. A DCS system response time test system, comprising: the device comprises an input signal generating circuit, an output signal collecting circuit and signal detecting equipment;
the input signal generating circuit is connected with a DI card of a DCS system, and comprises: the trigger circuit is used for controlling the on-off of the switch to generate an on-off signal;
the output signal acquisition loop is connected with the AO fastener or the DO fastener of DCS system, the output signal acquisition loop includes: a second resistor;
the signal detection device is used for detecting voltages on two sides of the switch to obtain a first voltage signal, detecting voltages on two sides of the second resistor to obtain a second voltage signal, and determining the response time of the DCS according to the first voltage signal and the second voltage signal.
7. The DCS system response time testing system of claim 6, wherein the signal detection device is specifically configured to determine an input signal trigger time according to the first voltage signal, determine an output signal response time according to the second voltage signal, and subtract the input signal trigger time from the output signal response time to obtain the DCS system response time.
8. The DCS system response time test system of claim 6, wherein the input signal generating circuit is provided with a power supply or the input signal generating circuit is connected to a power supply in the DCS system.
9. The DCS system response time testing system of claim 6, wherein a power supply is provided on said output signal acquisition loop or said input signal generation loop is connected to a power supply in said DCS system.
10. The DCS system response time test system of claim 6, wherein the switch is a high speed thyristor switching device.
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