CN103491460B - Input-output unit and control system - Google Patents
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- CN103491460B CN103491460B CN201310223511.5A CN201310223511A CN103491460B CN 103491460 B CN103491460 B CN 103491460B CN 201310223511 A CN201310223511 A CN 201310223511A CN 103491460 B CN103491460 B CN 103491460B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A kind of input-output unit is provided and controls system, it may be determined that circuit out-of-the way position。This input-output unit includes: input/output unit, the first converting means, the second converting means, the 3rd converting means and the 4th converting means。First converting means sends the state acknowledgement frame of the reception state comprising optical signal overlappingly with the signal of telecommunication to control device, second converting means becomes optical signal converting electrical signal overlapping for the state acknowledgement frame sent by the first converting means, 4th converting means sends the state acknowledgement frame of the reception state comprising optical signal overlappingly with the signal of telecommunication to control device, 3rd converting means becomes optical signal converting electrical signal overlapping for the state acknowledgement frame sent by the 4th converting means, and the reception state of the first converting means is obtained from the first converting means, for control device from status request frame, the state acknowledgement frame of the reception state comprising the first converting means with optical signal overlappingly to controlling device transmission。
Description
Technical field
The present invention relates to input-output unit and control system。
Background technology
At chemical plant, nuclear power station etc. to guarantee the safety control system for prepreerence local use, on availability (availability: represent the index of the size that this object affected, i.e. running rate by fault。) requirement very strict。Because if system stops because of certain fault, then the probability causing major break down is very big。Patent Document 1 discloses, by realizing double-circuit by the composition of dual processors device, connect multiple RIO(RemoteInputOutput, remote input exports) composition of unit improves the technology of availability。
<patent documentation 1>Japanese Unexamined Patent Publication 2011-113415 publication
Summary of the invention
(problem that invention to solve)
Fig. 5 having illustrated, the composition of expression dual processors device realizes double-circuit, connects multiple RIO(RemoteInputOutput) the disclosed block diagram constituted of the patent documentation of unit (input-output unit) 1。When cutting off optical cable S1 and optical cable S4, in patent documentation 1, as the exception first detecting optical cable S4, after revising optical cable S4, detection optical cable S1's is abnormal such, and the detection of out-of-the way position must have two steps。
(being used for the scheme of the problem that solves)
(1) a kind of input-output unit, it is characterised in that including:
Input/output unit, controls control object device according to the control claim frame carrying out self-control device, and sending to control device overlappingly with the signal of telecommunication for the control acknowledgement frame controlling claim frame；
First converting means, is included in the communication line of the first system, and the converting optical signals controlling claim frame overlapping of the communication line via the first system is become the signal of telecommunication；
Second converting means, is included in the communication line of the first system, and the converting electrical signal controlling acknowledgement frame overlapping is become optical signal；
3rd converting means, is included in the communication line of second system, and the converting electrical signal controlling acknowledgement frame overlapping is become optical signal；And
4th converting means, is included in the communication line of second system, and the converting optical signals controlling claim frame overlapping of the communication line via second system is become the signal of telecommunication,
First converting means is for the status request frame carrying out self-control device, the state acknowledgement frame of the reception state comprising optical signal with the signal of telecommunication overlappingly to controlling device transmission,
Second converting means becomes optical signal converting electrical signal overlapping for the state acknowledgement frame sent by the first converting means,
4th converting means for the status request frame carrying out self-control device, the state acknowledgement frame of the reception state comprising optical signal and the signal of telecommunication overlappingly to control device send,
3rd converting means becomes optical signal converting electrical signal overlapping for the state acknowledgement frame sent by the 4th converting means, and the reception state of the first converting means is obtained from the first converting means, for the status request frame carrying out self-control device, the state acknowledgement frame of the reception state comprising the first converting means with optical signal overlappingly to controlling device transmission。
(2) a kind of control system, including: above-mentioned input-output unit and control device, it is characterized in that: when controlling the state acknowledgement frame that device does not receive by the first converting means reply within the scheduled time from sending status request frame to the first converting means, it is judged that the communication line of the first system is abnormal。
(effect of invention)
According to the present invention it is possible to provide the input-output unit and the control system that can determine circuit out-of-the way position。
Accompanying drawing explanation
Fig. 1 is the block diagram of the composition illustrating the control system according to the present invention。
Fig. 2 is the figure of the composition illustrating communication frame。
The time chart of communication when Fig. 3 is normal。
The time chart of communication when Fig. 4 is exception。
Fig. 5 is the block diagram of the composition illustrating the control system according to prior art。
(description of reference numerals)
1,2,3:RIO unit；4: command device；5:CPU unit；11:RIO device；41: command link；121,122,141,142,341,342: photo-electric conversion device；123,143: link bus；131,132: electric wiring；150,250,350: operator；151,251,351: sensor
Detailed description of the invention
The composition of the control system comprising RIO unit (input-output unit) according to the present invention shown in Fig. 1。This control system is made up of CPU element 5A, CPU element 5B, RIO unit 1, RIO unit 2, RIO unit 3, is connected with command device 4。CPU element A, RIO unit 1, RIO unit 2, RIO unit 3 are connected with each other with optical cable S1～S4, T1～T4 respectively, CPU element B, RIO unit 1, RIO unit 2, RIO unit 3 are connected with each other with optical cable U1～U4, V1～V4 respectively, and CPU element 5A, CPU element 5B, command device 4 are connected with each other respectively through command link 41。
CPU element 5A is made up of CPU device (control device) A1, photo-electric conversion device A31, A32。CPU device A1 is connected with photo-electric conversion device A31 by First Series electric wiring A21, is connected with photo-electric conversion device A32 by second series electric wiring A22。CPU device A1 as described later, the RIO device being sent in RIO unit control claim frame and to the status request frame of photo-electric conversion device, and receive and control acknowledgement frame and the state acknowledgement frame from photo-electric conversion device from the RIO device in RIO unit。Comprise the claim frame R controlling claim frame and status request frame and comprise the acknowledgement frame A controlling acknowledgement frame and state acknowledgement frame, transmitting overlappingly with the signal of telecommunication in electric wiring, transmit overlappingly with optical signal in optical cable。Photo-electric conversion device A31, A32 are sent to light side the frame received from electrical side, and the frame received from light side joint is sent to electrical side。That is, photo-electric conversion device A31, A32 converts the signal of telecommunication and the optical signal of overlapping claim frame R and acknowledgement frame A mutually。Electrical side interface is to send to receive one, and light side interface is to send and receive separately。Photo-electric conversion device can load and unload in units of 1。Its reason is, for instance, break down at the photo-electric conversion device A31 being connected to First Series and change its period, it is also possible to use the photo-electric conversion device A32 being connected to second series to make system work on。Two photo-electric conversion device A31 and A32 are by connecting as the link bus A33 mutually sending the electric wiring receiving communication。
CPU element 5B is also the same。From command device 4 by command link 41, making the one party in CPU device A1 or CPU device B1 is principal series, and the opposing party is secondary series。
RIO unit 1 is made up of RIO device 11, photo-electric conversion device 121,122,141,142。RIO device 11 is connected with photo-electric conversion device 121,141 by First Series electric wiring 131, is connected with photo-electric conversion device 122,142 by second series electric wiring 132。Operator 150 and sensor 151 are connected with RIO device 11, and they are connected with control object device。In the same manner as CPU element, two photo-electric conversion devices 121,122 comprised in RIO unit 1 are connected with each other by linking bus 123, and two photo-electric conversion devices 141,142 are connected with each other by linking bus 143。RIO unit 2, RIO unit 3 are also the same。
Communication frame shown in Fig. 2。Beginning label F1 represents the beginning of frame。If sending destination location F2 and CPU, RIO, the respective address of photo-electric conversion device are unanimously, then receive this frame, if it is inconsistent, do not receive this frame。It addition, whole CPU, RIO, photo-electric conversion device have the address of unduplicated uniqueness。Be connected respectively to First Series and second series, be identical address by linking interconnective two photo-electric conversion devices of bus。Such as, photo-electric conversion device A31 and A32 is identical address。Photo-electric conversion device 121 and 122 is identical address。Transmission source address F3 records the respective address sending the CPU of this frame, RIO, photo-electric conversion device, sends frame。Type F4 records the difference of claim frame (REQ) and acknowledgement frame (ACK)。Circuit main website sends claim frame, and acknowledgement frame is replied in the circuit substation of response。RIO records input data or output data in data F5。It addition, with link bus interconnective two photo-electric conversion devices data communication by carrying out via this link bus, circulate a notice of First Series light-receiving state and second series light-receiving state each other always。Therefore, photo-electric conversion device can obtain the abnormal reception state of the optical signal representing the reception of both First Series and second series always, so can record the abnormal reception state of the optical signal representing First Series and second series in data F5。Such as, if photo-electric conversion device 121, then the First Series light-receiving state of the optical cable S1 of themselves capture is recorded and by linking the second series light-receiving state of the optical cable V1 of photo-electric conversion device 122 collection that bus connects。End mark F6 represents the end of frame。
If CPU device A1 is principal series, with CPU device A1 be circuit main website, RIO device 11,21,31 communicates for substation, proceed to the data output of control object device respectively through 150,250,350 pairs of RIO devices 11,21,31 of operator, and undertaken inputting from the data of control object device by sensor 151,251,351。CPU device B1 carries out being taken into of the Content of Communication of CPU device A1 (monitoring, snoop: amplification, from the meaning eavesdropped, refers to monitor network etc.)。In order to realize it, photo-electric conversion device 121,342 has always the function sent to light side (connecting the side of optical cable U1, V4) and electrical side (connecting the side of First Series electric wiring 131) to the frame of CPU device A1 received from light side joint。By via optical cable U1, V4 to the frame of CPU device A1 to CPU device B1 send, it is achieved monitor。CPU device B1 is the photo-electric conversion device 122,341 during principal series is also the same。So, owing to photo-electric conversion device 121,122,341,342 is different from other photo-electric conversion device E/O, so being expressed as E/O-RC in FIG。Further, since photo-electric conversion device A31, A32, B31, B32 in CPU element 5A, 5B are also different from other photo-electric conversion device E/O, so being expressed as E/O-CP in FIG。
Fig. 3 illustrates the time chart as communication time normal, the example sending reception communication frame in CPU element 5A。Periodically communicate。From CPU device to RIO device, First Series photo-electric conversion device, second series photo-electric conversion device communicate。CPU device sends identical claim frame R to First Series circuit with second series circuit with RIO device。First, CPU device sends the claim frame R to RIO in First Series circuit via optical cable S1, in second series circuit, the claim frame R to RIO is sent via optical cable T4。The claim frame R sent returns to CPU device by photo-electric conversion device transmission, but the address of CPU device oneself is inconsistent with the address of this claim frame, so not receiving the claim frame of this return。Then, CPU device, via optical cable S4 in First Series circuit, via optical cable T1 in second series circuit, receive the acknowledgement frame A of CPU device from RIO device。
Then, CPU device, First Series circuit is sent to via optical cable S1 the claim frame R of the photo-electric conversion device of First Series, second series circuit is sent to via optical cable T4 the claim frame R of the photo-electric conversion device of second series。The claim frame R sent returns to CPU device by photo-electric conversion device transmission, but the address of CPU device oneself is inconsistent with the address of this claim frame, so not receiving the claim frame of this return。Photo-electric conversion device sends frame to connected circuit。CPU device, receives the acknowledgement frame A of CPU device in First Series circuit via optical cable S4 from the photo-electric conversion device of First Series, receives the acknowledgement frame A of CPU device in second series circuit from the photo-electric conversion device of second series via optical cable T1。Fig. 3 illustrates 1 cycle of communication。Illustrate that RIO, First Series photo-electric conversion device, second series photo-electric conversion device are example when 1 respectively, but when connecting multiple stage, repeat that the number of units that connects with them is corresponding to communicate。It is represented by dashed line in figure 3。Photo-electric conversion device (E/O, E/O-RC, E/O-CP) sends acknowledgement frame to optical link and electric wiring the two circuit。This is to transmit light-receiving state to these two CPU of CPU device A1, CPU device B1。
The time chart of communication when Fig. 4 illustrates exception。When being all abnormal for optical cable S1, S4 in FIG。Second series can normally send reception, and First Series can not receive completely。CPU device A1, after sending control claim frame and status request frame, waits to be received from the control acknowledgement frame of RIO device and the state acknowledgement frame from photo-electric conversion device, when not receiving control acknowledgement frame and state acknowledgement frame within the scheduled time, stops to receive。Response time-out is it can be used as to detect。From sending time of detect to response time-out of claim frame, as response time-out time, be set to from optical cable S1, S4 time all normal transmission claim frame to can receive acknowledgement frame time maximum more than value。CPU device A1 detects based on response time-out, it is judged that the communication line of the First Series being made up of optical cable S1, S2, S3, S4, i.e. comprise the communication line of First Series of photo-electric conversion device 121 and 141 for abnormal。By such judgement, it is possible to transfer to the next process sending and controlling claim frame or status request frame。Similarly, CPU device A1 detects based on response time-out, it is judged that the communication line of the second series being made up of optical cable T1, T2, T3, T4, i.e. comprise the communication line of second series of photo-electric conversion device 142 and 122 for abnormal。By such judgement, the communication line for each system can transfer to the next process sending and controlling claim frame or status request frame。
Shown in Fig. 1, have according to the RIO unit (input-output unit) 1 of the present invention: RIO device 11, photo-electric conversion device 121, photo-electric conversion device 141, photo-electric conversion device 122, photo-electric conversion device 142。RIO device 11 controls control object device according to the control claim frame R from CPU device A1, and sending to CPU device A1 overlappingly with the signal of telecommunication for the control acknowledgement frame A controlling claim frame R。Photo-electric conversion device 121 is included in the communication line of First Series, the converting optical signals overlapping for claim frame R that controls of the communication line via First Series is become the signal of telecommunication, and for the status request frame R from CPU device A1, the state acknowledgement frame A of the reception state comprising optical signal is sent to CPU device A1 overlappingly with the signal of telecommunication。Photo-electric conversion device 141 controls converting electrical signal overlapping for acknowledgement frame R and becomes optical signal, and the converting electrical signal overlapping for state acknowledgement frame A sent by photo-electric conversion device 121 is become optical signal。Photo-electric conversion device 122, it is included in the communication line of second series, the converting optical signals overlapping for claim frame R that controls of the communication line via second series is become the signal of telecommunication, and the converting electrical signal overlapping for state acknowledgement frame A sent by photo-electric conversion device 142 is become optical signal。Photo-electric conversion device 122 obtains the reception state of photo-electric conversion device 121 further from photo-electric conversion device 121, for the status request frame R from CPU device A1, the state acknowledgement frame A of the reception state comprising photo-electric conversion device 121 is sent to CPU device A1 overlappingly with optical signal。Photo-electric conversion device 142 is included in the communication line of second series, the converting optical signals overlapping for claim frame R that controls of the communication line via second series is become the signal of telecommunication, and for the status request frame R from CPU device A1, the state acknowledgement frame A of the reception state comprising optical signal is sent to CPU device A1 overlappingly with the signal of telecommunication。Therefore, even if optical cable S1 and S4 is cut-off, it is also possible to based on the state acknowledgement frame A from photo-electric conversion device 122 to CPU device A1, the cut-out of detection optical cable S1。
Utilize the data communication timing that link bus carries out, be send always and receive always in the above-described embodiment。But, photo-electric conversion device can also to receive from the claim frame of CPU device as opportunity, via link bus, the photo-electric conversion device of other series is sent the status enquiry order of the data demand comprising other series light-receiving state, in the state notifying response notified as its response, comprises the data about other series light-receiving state。By so, need not mutually circulate a notice of the light-receiving state of First Series and second series always, it is possible to save the data communication process performance carried out via link bus。Photo-electric conversion device together with self series light-receiving state, is documented in other series light-receiving state so obtained in the acknowledgement frame for the claim frame from CPU device, communicates with CPU device。
Before the principal series (CPU device A1) and pair series (CPU device A2) of CPU switching device, can pass through, via the data communication from the photo-electric conversion device to the link bus of the photo-electric conversion device being connected to second series that are connected to First Series, to be collected the exception of optical cable U1～U4 by second series circuit。So, by the exception of the optical cable U1～U4 collected by CPU device A2 is informed command device 4, the operator of command device 4 stops the series switching of CPU device, thus can avoid can not communicating after just switching, can not continue with CPU device and control the situation of control object。
The series switching of CPU device has the CPU device B1 of secondary series, the CPU device B1 of secondary series and the CPU device A1 state synchronized termly of principal series。On the other hand, photo-electric conversion device 121 sends the state acknowledgement frame A of the reception state comprising optical signal with the signal of telecommunication overlappingly for the status request frame R from CPU device A1 to CPU device A1, and overlapping with optical signal for the state acknowledgement frame A comprising reception state, sent to CPU device B1 by optical cable U1。Additionally, photo-electric conversion device 123, the reception state of photo-electric conversion device 121 is obtained from photo-electric conversion device 121, for the status request frame R from CPU device A1, the state acknowledgement frame A of the reception state comprising photo-electric conversion device 121 is sent to CPU device A1 overlappingly with optical signal, and the state acknowledgement frame A of the reception state comprising photo-electric conversion device 121 is sent to the CPU device B1 of the secondary series with CPU device A1 state synchronized overlappingly with the signal of telecommunication。The state acknowledgement frame A of the reception state that comprise photo-electric conversion device 121 overlapping with the signal of telecommunication, utilizes photo-electric conversion device 342 overlapping with optical signal, is arrived the CPU device B1 of secondary series by optical cable V4。So, CPU device B1 is owing to monitoring photo-electric conversion device to the CPU device A1 acknowledgement frame sent, it is possible to Billy determines that with the out-of-the way position of regular state synchronized carrying out out-of-the way position quickly determines。
Claims (5)
1. an input-output unit, it is characterised in that including:
Input/output unit, controls control object device according to the control claim frame carrying out self-control device, and the control acknowledgement frame for above-mentioned control claim frame is sent to above-mentioned control device overlappingly with the signal of telecommunication；
First converting means, is included in the communication line of the first system, and converting optical signals overlapping for the above-mentioned control claim frame of the communication line via above-mentioned the first system is become the signal of telecommunication；
Second converting means, is included in the communication line of above-mentioned the first system, and converting electrical signal overlapping for above-mentioned control acknowledgement frame is become optical signal；
3rd converting means, is included in the communication line of second system, and converting electrical signal overlapping for above-mentioned control acknowledgement frame is become optical signal；And
4th converting means, is included in the communication line of above-mentioned second system, and converting optical signals overlapping for the above-mentioned control claim frame of the communication line via above-mentioned second system is become the signal of telecommunication,
Above-mentioned first converting means, for the status request frame from above-mentioned control device, sends the state acknowledgement frame of the reception state comprising optical signal with the signal of telecommunication overlappingly to above-mentioned control device,
Above-mentioned second converting means becomes optical signal converting electrical signal overlapping for the above-mentioned state acknowledgement frame sent by above-mentioned first converting means,
Above-mentioned 4th converting means, for the status request frame from above-mentioned control device, sends the state acknowledgement frame of the reception state comprising optical signal with the signal of telecommunication overlappingly to above-mentioned control device,
Above-mentioned 3rd converting means becomes optical signal converting electrical signal overlapping for the above-mentioned state acknowledgement frame sent by above-mentioned 4th converting means, and the above-mentioned reception state of above-mentioned first converting means is obtained from above-mentioned first converting means, for the status request frame from above-mentioned control device, the state acknowledgement frame of the above-mentioned reception state comprising above-mentioned first converting means is sent to above-mentioned control device overlappingly with optical signal。
2. input-output unit as claimed in claim 1, it is characterised in that:
Above-mentioned first converting means, when detecting the exception of the overlapping above-mentioned optical signal of above-mentioned control claim frame, represents the above-mentioned abnormal above-mentioned reception state of above-mentioned optical signal to above-mentioned 3rd converting means notice；
Above-mentioned 3rd converting means, based on the above-mentioned notice from above-mentioned first converting means, obtains the above-mentioned reception state of above-mentioned first converting means。
3. input-output unit as claimed in claim 2, it is characterised in that:
Above-mentioned 3rd converting means sends the status enquiry order of the data demand comprising the above-mentioned reception state about above-mentioned first converting means to above-mentioned first converting means；
Above-mentioned first converting means would indicate that the above-mentioned abnormal above-mentioned reception state of above-mentioned optical signal is included in during the state notifying for above-mentioned status enquiry order responds and informs above-mentioned second converting means。
4. input-output unit as claimed in claim 2, it is characterised in that:
Above-mentioned 3rd converting means obtains the above-mentioned reception state of above-mentioned first converting means from above-mentioned first converting means, for the above-mentioned status request frame from above-mentioned control device, the above-mentioned state acknowledgement frame of the above-mentioned reception state comprising above-mentioned first converting means is sent to above-mentioned control device overlappingly with above-mentioned optical signal, and the above-mentioned state acknowledgement frame of the above-mentioned reception state comprising above-mentioned first converting means is sent to the control device of the secondary series Tong Bu with above-mentioned control unit state overlappingly with the signal of telecommunication。
5. one kind controls system, it is characterised in that including:
Input-output unit and control device,
Above-mentioned input-output unit includes:
Input/output unit, controls control object device according to the control claim frame carrying out self-control device, and the control acknowledgement frame for above-mentioned control claim frame is sent to above-mentioned control device overlappingly with the signal of telecommunication；
First converting means, is included in the communication line of the first system, and converting optical signals overlapping for the above-mentioned control claim frame of the communication line via above-mentioned the first system is become the signal of telecommunication；
Second converting means, is included in the communication line of above-mentioned the first system, and converting electrical signal overlapping for above-mentioned control acknowledgement frame is become optical signal；
3rd converting means, is included in the communication line of second system, and converting electrical signal overlapping for above-mentioned control acknowledgement frame is become optical signal；And
4th converting means, is included in the communication line of above-mentioned second system, and converting optical signals overlapping for the above-mentioned control claim frame of the communication line via above-mentioned second system is become the signal of telecommunication,
Above-mentioned first converting means, for the status request frame from above-mentioned control device, sends the state acknowledgement frame of the reception state comprising optical signal with the signal of telecommunication overlappingly to above-mentioned control device,
Above-mentioned second converting means becomes optical signal converting electrical signal overlapping for the above-mentioned state acknowledgement frame sent by above-mentioned first converting means,
Above-mentioned 4th converting means, for the status request frame from above-mentioned control device, sends the state acknowledgement frame of the reception state comprising optical signal with the signal of telecommunication overlappingly to above-mentioned control device,
Above-mentioned 3rd converting means becomes optical signal converting electrical signal overlapping for the above-mentioned state acknowledgement frame sent by above-mentioned 4th converting means, and the above-mentioned reception state of above-mentioned first converting means is obtained from above-mentioned first converting means, for the status request frame from above-mentioned control device, the state acknowledgement frame of the above-mentioned reception state comprising above-mentioned first converting means is sent to above-mentioned control device overlappingly with optical signal
When above-mentioned control device does not receive, within the scheduled time from sending above-mentioned status request frame to above-mentioned first converting means, the above-mentioned state acknowledgement frame replied by above-mentioned first converting means, it is judged that the communication line of above-mentioned the first system is abnormal。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012133558A JP5847023B2 (en) | 2012-06-13 | 2012-06-13 | Input / output unit and control system |
| JP2012-133558 | 2012-06-13 |
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| CN103491460A CN103491460A (en) | 2014-01-01 |
| CN103491460B true CN103491460B (en) | 2016-06-22 |
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| JP (1) | JP5847023B2 (en) |
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| JP6373630B2 (en) * | 2014-04-28 | 2018-08-15 | 株式会社日立製作所 | Relay control system and communication relay method |
| JP6444711B2 (en) * | 2014-12-02 | 2018-12-26 | 株式会社日立製作所 | Control system |
| JP6698404B2 (en) * | 2016-03-30 | 2020-05-27 | 三菱電機株式会社 | Switchboard control device and switchboard system using the switchboard control device |
| CN113505028A (en) * | 2021-07-14 | 2021-10-15 | 珠海格力电器股份有限公司 | Device switching method and device, electronic device and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446608A (en) * | 2007-11-28 | 2009-06-03 | 上海精益电器厂有限公司 | Calibration device for automatic transfer switch controller |
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| JPS5870658A (en) * | 1981-10-22 | 1983-04-27 | Nippon Denso Co Ltd | Multiple signal transmission system for car |
| JPS58186801A (en) * | 1982-04-26 | 1983-10-31 | Toshiba Corp | Monitoring, controlling, and transmitting method of plant |
| US8239158B2 (en) * | 2008-08-04 | 2012-08-07 | National Instruments Corporation | Synchronizing a loop performed by a measurement device with a measurement and control loop performed by a processor of a host computer |
| JP5152765B2 (en) * | 2009-02-25 | 2013-02-27 | 株式会社日立製作所 | Line switching device and plant control system |
| JP2011113415A (en) * | 2009-11-27 | 2011-06-09 | Hitachi Ltd | Control system and cpu unit |
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| CN101446608A (en) * | 2007-11-28 | 2009-06-03 | 上海精益电器厂有限公司 | Calibration device for automatic transfer switch controller |
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| Publication number | Publication date |
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| JP5847023B2 (en) | 2016-01-20 |
| CA2818367C (en) | 2015-11-17 |
| JP2013257746A (en) | 2013-12-26 |
| CN103491460A (en) | 2014-01-01 |
| CA2818367A1 (en) | 2013-12-13 |
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