CA1140243A - Simulator modules and rack assembly - Google Patents
Simulator modules and rack assemblyInfo
- Publication number
- CA1140243A CA1140243A CA000333481A CA333481A CA1140243A CA 1140243 A CA1140243 A CA 1140243A CA 000333481 A CA000333481 A CA 000333481A CA 333481 A CA333481 A CA 333481A CA 1140243 A CA1140243 A CA 1140243A
- Authority
- CA
- Canada
- Prior art keywords
- assembly
- circuit board
- input
- plug
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 101100411613 Bacillus subtilis (strain 168) racX gene Proteins 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 241000283986 Lepus Species 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
- C10G1/045—Separation of insoluble materials
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13186—Simulation, also of test inputs
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14089—Display of control states on cards, by leds
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14144—Galvanic isolation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/15—Plc structure of the system
- G05B2219/15078—Modules, construction of system
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Programmable Controllers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A rack assembly for use as an input/output interface with a programmable controller has a top cover carrying socket stations in which input/output modules may be received to interconnect a controlled system with a central processor unit of the controller. Normal service modules may be replaced by simulator modules to allow checking of the operation.
A rack assembly for use as an input/output interface with a programmable controller has a top cover carrying socket stations in which input/output modules may be received to interconnect a controlled system with a central processor unit of the controller. Normal service modules may be replaced by simulator modules to allow checking of the operation.
Description
114~)Z~
~ 2 --This invention concerns improvements in or rela-tiny to programmable controllers.
A programmable controller normally comprises a central processor unit, an input section which receives signals from the system being controlled, converts these siynals to suitable lo~ic signals and passes these logic signals to the processor unit, and an output section for receiving logic signals from the processor unit and passing control signals of a suitable level to the system.
It is desirable that a simulator facility be provided for training purposes and for checking programmes stored in the processor unit.
Hitherto, one method of providing a simulator facility has been to connect switches directly to all the channels of the input section ana to connect inclicator lights direetly to all the channels o~
the output section. Clearly, this requires that the switches and indicators can operate at the volta~es for which the input and output sections were originally designed. ~lso, such a method requires reMoving all of the connections from the input and output sections to the system with a resultant increase in down-time of the controller and the system.
In another method hitherto proposed, a simulator bo~ is provided containing switches and indicators and also inclucling a communication interface which allows the hox to be connected directly to the processor unit. Whilst this permits the same switches and indicators t:o he used with an~ system, the provision of a coml~n:ication interface in each ~ox is expensive.
It is an object of the present inventiorl to provide Z~3 a simulator facility at relatively low cost, the implementation of which does not involve unacceptable down-time o the system and controller.
It is also an object of the present invention to provide an input/output rack assembly for a programmable controller adapted to receive any desired combination o plug-in modules.
According to one aspect of the present invention there is provided an input simulator module for a programmable controller, the input section of which normally includes a plug-in input module, the input simulator module comprising a plug-in unit having a plurality of connector pins adapted to engage a socket in the input section of the controller, the plug-in unit including switch means connected to said connector pins so that a desired logic signal may be passed to the processor unit o the controller.
According to another aspect of the present invention there is provided an output simulator module for a programmable controller, the output section of which normally includes a plug-in output module, the output - simulator module comprising a plug-in unit having a plurality o connector pins adapted to engage a socket in the output section of the controller, the plug-in unit including indicator means connected to said connector pins and arranged to indicate the condition of a logic signal fed to said socket by the processor unit.
Further according to the present invention, there is pr~vided an input/output rack assembly or a programmable controller, the racX assemb~y comprising a hase, a top cover having a plurality of socket stations adapted to receive plug-in illpUt/OU tpU-t modules said socket station being connected to a circuit ~oard,
~ 2 --This invention concerns improvements in or rela-tiny to programmable controllers.
A programmable controller normally comprises a central processor unit, an input section which receives signals from the system being controlled, converts these siynals to suitable lo~ic signals and passes these logic signals to the processor unit, and an output section for receiving logic signals from the processor unit and passing control signals of a suitable level to the system.
It is desirable that a simulator facility be provided for training purposes and for checking programmes stored in the processor unit.
Hitherto, one method of providing a simulator facility has been to connect switches directly to all the channels of the input section ana to connect inclicator lights direetly to all the channels o~
the output section. Clearly, this requires that the switches and indicators can operate at the volta~es for which the input and output sections were originally designed. ~lso, such a method requires reMoving all of the connections from the input and output sections to the system with a resultant increase in down-time of the controller and the system.
In another method hitherto proposed, a simulator bo~ is provided containing switches and indicators and also inclucling a communication interface which allows the hox to be connected directly to the processor unit. Whilst this permits the same switches and indicators t:o he used with an~ system, the provision of a coml~n:ication interface in each ~ox is expensive.
It is an object of the present inventiorl to provide Z~3 a simulator facility at relatively low cost, the implementation of which does not involve unacceptable down-time o the system and controller.
It is also an object of the present invention to provide an input/output rack assembly for a programmable controller adapted to receive any desired combination o plug-in modules.
According to one aspect of the present invention there is provided an input simulator module for a programmable controller, the input section of which normally includes a plug-in input module, the input simulator module comprising a plug-in unit having a plurality of connector pins adapted to engage a socket in the input section of the controller, the plug-in unit including switch means connected to said connector pins so that a desired logic signal may be passed to the processor unit o the controller.
According to another aspect of the present invention there is provided an output simulator module for a programmable controller, the output section of which normally includes a plug-in output module, the output - simulator module comprising a plug-in unit having a plurality o connector pins adapted to engage a socket in the output section of the controller, the plug-in unit including indicator means connected to said connector pins and arranged to indicate the condition of a logic signal fed to said socket by the processor unit.
Further according to the present invention, there is pr~vided an input/output rack assembly or a programmable controller, the racX assemb~y comprising a hase, a top cover having a plurality of socket stations adapted to receive plug-in illpUt/OU tpU-t modules said socket station being connected to a circuit ~oard,
2~;~
first terminal means for connecting said circuit board to the system being controlled, seconcl terminal means for connecting the circuit board to the cen-tral processor unit of the controller, said first terminal means and second terminal means being interconnected through plug-in input/output modules received in said sockets.
Embodiments or the present invention will now b~
described, by wày of example, with reference to the accompanying drawings, in which:
Fig. 1 is an elevational view, partly sectioned on the line A-A of Fig. 2, of a plug--in simulator module of the present invention;
E'ig. 2 is a bottom plan view of the module of Fig. l;
Fig. 3 is an elevational view of the internal circuit board of a simulator input module made in accordance with the present invention;
Fig. 4 is a circuit diagram of the module o~
Fig. 3;
Fig. 5 is an elevational view of the internal circuit board of an output simulator module made in accordance with the present invention;
Fig. 6 is a circuit diagram of the module of Fig. 5;
Fig. 7 is a circuit diagram of a plug-in input module for a programmable controller;
Fig. 8 is a circuit diagram of a plug-in output module of a programmable controller;
Fig. 9 is a top plan view of a rack assembly of the present inveniion;
E'ig. 10 is a section ta}cen alo}lg the line A-A of Fig. 9; arld 114~Z43 Fig. 11 is a plan view of the bottom plate of the racX assembly of the present invention.
Referring to the drawings, a plug-in module for a programmable controller comprises a module box 1 havlng a pluralit~ of output connector pins 2 which can be received in a suitable socket of the input or output sections of a programmable controller. The pins 2 are fixed to a plastics top cover plate 3.
A printed circuit board 4 ~as seen in Figs. 3 and 4) serving to connect the pins 2 with the internal circui~ry of the plug-in module, as will be described hereinbelow, is secured to the plate 3 and disposed within the box 1. The module box 1 is provided with captive screws 5 by which it can be secured to the rack assembly of Fig. 9.
Figs. 3 and 4 show a simulator input module whexein the pins 2 are interconnected by a pair of toggle switches 10 which partially project from the box 1.
Input pins 2 are connected to ground 11 and to logic level 12 voltages and, depending on the positions of the switches 10, a desired logic output can be fed to output pins 2 of the module via lines 13~ This logic output is fed to the central processor as an input loyic signal.
Referring to Figs. 5 and 6, an output simulator rnodule includes a pair of light emitting diodes 20 mounted on the circuit board 4 so as to be visible outside the module box 1. The anodes of the light e~nitting cliodes 20 are connected to a logic voltage level 22 via input pins 2 and the cathodes are connec-ted to output terminal pins 2 of the module through respective resistors 21. These pins receive output loyic signals from the central processor u~it ~14~2~3 and depending on the logic level received, the llght emitting diodes 20 will give an indication of the status of the output logic signals.
Fig. 7 illustrates a circuit diagram of one embodiment of a plug-in input module for a programmable controller. The circuit is formed on a printed circuit board 4 o, for e~ample, the module of Fig. 1 and serves to convert the input signal from the systern being controlled to a logic level which can be handled lo by the ~rocessor unit. The circuitry also serves to suppress any noise from the system.
The circuit comprises an odd channei 70 and an even channel 72. Each channel includes an input circuit and an output circuit interconnected by an optical isolator 74. The input circuit includes a rectifier bridge 7~, a protective Zener dlode 78, and a smoothing capacitor 80 and filter 82. The output circuit includes an output transistor stage 84. Thus the incoming signals are isolated from the outgoing signals. The input filter characteristics and resistance values can be selected to reject spurious voltages, while the output stage 84 provides consistent signals.
LED's ~6 are provided to give a visual indication of logic levels at all times.
Fig- 8 shows a circuit diagram of one ernbodiment of plug~in output module for a programmable controller~
This circuit is also ormed on a circuit board ~ and is adapted to receive a logic signal from the processor unit and on receipt of such a signal passes a relatively high level voltage control signal to the system.
Fig. 8 illustrates a t~o-channel system in which each channel has isolation provided by a transforrner TFI. The primary of the t~ansformer is 114g~24~
switched by a transistor TRl in response to the input signal and an enable signal. The secondary of the transformer controls a transistor T~2 which triggers a power triac TRCl connected between line and load.
Again, LED's are provided to allow logic levels to be monitored visually.
A rack assembly for a programmable controller is illustrated in Fiys. ~ and 10 and comprises a plastics moulding 50 having a plurality of socket stations 51 adaptea to receive the plug-in modules described hereinabove and illustrated in Fig. 1.
The soc]cet stations 51 communicate with a printed circuit board 52 fixed between the moulding 50 and a bottom plate 53 and held there by suitable screws 5~ passing through apertures 55 in the bottom plate and corresponding apertures in the printed circuit board 52.
A terminal strip 56 is provided for connecting the circuit board 52 with the system to be controlled.
The logic signals from the sockets to the processor and from the processor to the sockets are fed through a terminal connector 57 on the circuit board 52.
The printed circuit board includes integrated circuits (not shown) which form the interface between the inpu~/outpu~ sections a/ù the processor unit.
first terminal means for connecting said circuit board to the system being controlled, seconcl terminal means for connecting the circuit board to the cen-tral processor unit of the controller, said first terminal means and second terminal means being interconnected through plug-in input/output modules received in said sockets.
Embodiments or the present invention will now b~
described, by wày of example, with reference to the accompanying drawings, in which:
Fig. 1 is an elevational view, partly sectioned on the line A-A of Fig. 2, of a plug--in simulator module of the present invention;
E'ig. 2 is a bottom plan view of the module of Fig. l;
Fig. 3 is an elevational view of the internal circuit board of a simulator input module made in accordance with the present invention;
Fig. 4 is a circuit diagram of the module o~
Fig. 3;
Fig. 5 is an elevational view of the internal circuit board of an output simulator module made in accordance with the present invention;
Fig. 6 is a circuit diagram of the module of Fig. 5;
Fig. 7 is a circuit diagram of a plug-in input module for a programmable controller;
Fig. 8 is a circuit diagram of a plug-in output module of a programmable controller;
Fig. 9 is a top plan view of a rack assembly of the present inveniion;
E'ig. 10 is a section ta}cen alo}lg the line A-A of Fig. 9; arld 114~Z43 Fig. 11 is a plan view of the bottom plate of the racX assembly of the present invention.
Referring to the drawings, a plug-in module for a programmable controller comprises a module box 1 havlng a pluralit~ of output connector pins 2 which can be received in a suitable socket of the input or output sections of a programmable controller. The pins 2 are fixed to a plastics top cover plate 3.
A printed circuit board 4 ~as seen in Figs. 3 and 4) serving to connect the pins 2 with the internal circui~ry of the plug-in module, as will be described hereinbelow, is secured to the plate 3 and disposed within the box 1. The module box 1 is provided with captive screws 5 by which it can be secured to the rack assembly of Fig. 9.
Figs. 3 and 4 show a simulator input module whexein the pins 2 are interconnected by a pair of toggle switches 10 which partially project from the box 1.
Input pins 2 are connected to ground 11 and to logic level 12 voltages and, depending on the positions of the switches 10, a desired logic output can be fed to output pins 2 of the module via lines 13~ This logic output is fed to the central processor as an input loyic signal.
Referring to Figs. 5 and 6, an output simulator rnodule includes a pair of light emitting diodes 20 mounted on the circuit board 4 so as to be visible outside the module box 1. The anodes of the light e~nitting cliodes 20 are connected to a logic voltage level 22 via input pins 2 and the cathodes are connec-ted to output terminal pins 2 of the module through respective resistors 21. These pins receive output loyic signals from the central processor u~it ~14~2~3 and depending on the logic level received, the llght emitting diodes 20 will give an indication of the status of the output logic signals.
Fig. 7 illustrates a circuit diagram of one embodiment of a plug-in input module for a programmable controller. The circuit is formed on a printed circuit board 4 o, for e~ample, the module of Fig. 1 and serves to convert the input signal from the systern being controlled to a logic level which can be handled lo by the ~rocessor unit. The circuitry also serves to suppress any noise from the system.
The circuit comprises an odd channei 70 and an even channel 72. Each channel includes an input circuit and an output circuit interconnected by an optical isolator 74. The input circuit includes a rectifier bridge 7~, a protective Zener dlode 78, and a smoothing capacitor 80 and filter 82. The output circuit includes an output transistor stage 84. Thus the incoming signals are isolated from the outgoing signals. The input filter characteristics and resistance values can be selected to reject spurious voltages, while the output stage 84 provides consistent signals.
LED's ~6 are provided to give a visual indication of logic levels at all times.
Fig- 8 shows a circuit diagram of one ernbodiment of plug~in output module for a programmable controller~
This circuit is also ormed on a circuit board ~ and is adapted to receive a logic signal from the processor unit and on receipt of such a signal passes a relatively high level voltage control signal to the system.
Fig. 8 illustrates a t~o-channel system in which each channel has isolation provided by a transforrner TFI. The primary of the t~ansformer is 114g~24~
switched by a transistor TRl in response to the input signal and an enable signal. The secondary of the transformer controls a transistor T~2 which triggers a power triac TRCl connected between line and load.
Again, LED's are provided to allow logic levels to be monitored visually.
A rack assembly for a programmable controller is illustrated in Fiys. ~ and 10 and comprises a plastics moulding 50 having a plurality of socket stations 51 adaptea to receive the plug-in modules described hereinabove and illustrated in Fig. 1.
The soc]cet stations 51 communicate with a printed circuit board 52 fixed between the moulding 50 and a bottom plate 53 and held there by suitable screws 5~ passing through apertures 55 in the bottom plate and corresponding apertures in the printed circuit board 52.
A terminal strip 56 is provided for connecting the circuit board 52 with the system to be controlled.
The logic signals from the sockets to the processor and from the processor to the sockets are fed through a terminal connector 57 on the circuit board 52.
The printed circuit board includes integrated circuits (not shown) which form the interface between the inpu~/outpu~ sections a/ù the processor unit.
Claims (10)
1. An input/output rack assembly for a programmable controller, the assembly comprising a base, a top cover having a plurality of socket stations adapted to receive plug-in input/
output modules, a circuit board to which said socket stations are connected, first terminal means for connecting the circuit board to a system being controlled, and second terminal means for connecting the circuit board to a central processor unit of the controller, said first terminal means and said second terminal means being interconnected, in use, through plug-in input/output modules received in said sockets.
output modules, a circuit board to which said socket stations are connected, first terminal means for connecting the circuit board to a system being controlled, and second terminal means for connecting the circuit board to a central processor unit of the controller, said first terminal means and said second terminal means being interconnected, in use, through plug-in input/output modules received in said sockets.
2. The assembly of Claim 1, in which the circuit board is secured between the base and the top cover.
3. The assembly of Claim 2, in which the first terminal means is mounted on the cover and the second terminal means is mounted on the circuit board.
4. The assembly of Claim 1, in combination with an input simulator module comprising a plug-in unit having a plurality of connector pins engaging one of said socket stations, and switch means connected to said connector pins so that a desired logic signal may be passed to the processor unit.
5. The assembly of Claim 4, wherein two of the con-nector pins are adapted to receive a logic high signal and a ground signal, and the switch means comprises a plurality of two-position switches for connecting said signals to selected other ones of the connector pins.
6. The assembly of Claim 1, in combination with an output simulator module comprising a plug-in unit having a plurality of connector pins engaging one of said socket stations, and indicator means connected to said connector pins and arranged to indicate the condition of logic signals fed to said socket station by the processor unit.
7. The assembly of Claim 6, in which the indicator means comprises a plurality of light sources each having one terminal connected to one of the connector pins for connection to a logic voltage level and another terminal connected to a respective connector pin for connection to respective output logic signals from the processor unit.
8. The assembly of Claim 7, in which each light source is a light-emitting diode, and a respective resistor is connected in series with each light-emitting diode.
9. The assembly of Claim 4 in which the plug-in unit comprises a box-shaped housing having the connector pins mounted on a plastics top plate thereof.
10. The assembly of Claim 9, including a circuit board secured to said top plate and disposed within said housing, the indicator means or switch means being mounted on the circuit board to partially project through the housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB32892/78 | 1978-08-10 | ||
| GB7832892 | 1978-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140243A true CA1140243A (en) | 1983-01-25 |
Family
ID=10498973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000333481A Expired CA1140243A (en) | 1978-08-10 | 1979-08-09 | Simulator modules and rack assembly |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0015289A1 (en) |
| JP (1) | JPH0128403B2 (en) |
| AU (1) | AU535935B2 (en) |
| CA (1) | CA1140243A (en) |
| DK (1) | DK153480A (en) |
| ES (2) | ES483321A1 (en) |
| IE (1) | IE48616B1 (en) |
| IT (1) | IT1119149B (en) |
| WO (1) | WO1980000381A1 (en) |
| ZA (1) | ZA794176B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4621200A (en) * | 1985-02-11 | 1986-11-04 | Lovrenich Rodger T | Control device including a conductively isolated depluggable controller |
| DE3627621A1 (en) * | 1986-08-14 | 1988-02-18 | Nordischer Maschinenbau | ELECTRONIC CONTROL DEVICE FOR CONTROLLING ACTUATORS IN A FISH PROCESSING MACHINE |
| DE3633800A1 (en) * | 1986-10-04 | 1988-04-14 | Endress Hauser Gmbh Co | DEVICE FOR RECEIVING, PROCESSING, RECEIVING AND PROMOTING ELECTRICAL SIGNALS |
| FR2612309B1 (en) * | 1987-03-11 | 1989-07-07 | Spie Trindel | METHOD FOR VALIDATING THE OPERATION OF AN AUTOMATION SYSTEM AND DEVICE FOR IMPLEMENTING IT |
| EP0374293A1 (en) * | 1988-12-22 | 1990-06-27 | Siemens Aktiengesellschaft | Output device |
| FR2641095B1 (en) * | 1988-12-23 | 1991-02-15 | Peugeot | |
| DE4106193A1 (en) * | 1990-03-01 | 1991-10-02 | Fuji Electric Co Ltd | INPUT / OUTPUT SIGNAL CONVERTER CIRCUIT OF A PROGRAMMABLE CONTROLLER |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1902892A1 (en) * | 1968-01-25 | 1969-09-11 | Tribo Electronics Ltd | Tax system |
| US3829842A (en) * | 1973-02-22 | 1974-08-13 | Terry Controls Corp | Automatic self-testing programmable industrial controller |
| US4171541A (en) * | 1976-08-18 | 1979-10-16 | American Manufacturing Company, Inc. | Modular programmable controlling system |
| JPS6057084B2 (en) * | 1976-12-04 | 1985-12-13 | 富士電機株式会社 | Simulated input device for sequence controller |
-
1979
- 1979-08-08 WO PCT/GB1979/000135 patent/WO1980000381A1/en unknown
- 1979-08-08 JP JP54501214A patent/JPH0128403B2/ja not_active Expired
- 1979-08-09 CA CA000333481A patent/CA1140243A/en not_active Expired
- 1979-08-09 IE IE1525/79A patent/IE48616B1/en unknown
- 1979-08-10 ZA ZA00794176A patent/ZA794176B/en unknown
- 1979-08-10 IT IT68658/79A patent/IT1119149B/en active
- 1979-08-10 ES ES483321A patent/ES483321A1/en not_active Expired
- 1979-08-10 AU AU49791/79A patent/AU535935B2/en not_active Ceased
-
1980
- 1980-03-11 EP EP79900891A patent/EP0015289A1/en active Pending
- 1980-04-10 DK DK153480A patent/DK153480A/en not_active IP Right Cessation
- 1980-05-02 ES ES491218A patent/ES8107400A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1119149B (en) | 1986-03-03 |
| AU4979179A (en) | 1980-02-14 |
| ES491218A0 (en) | 1981-08-16 |
| IE48616B1 (en) | 1985-03-20 |
| JPH0128403B2 (en) | 1989-06-02 |
| ES8107400A1 (en) | 1981-08-16 |
| IE791525L (en) | 1980-02-10 |
| WO1980000381A1 (en) | 1980-03-06 |
| ZA794176B (en) | 1981-04-29 |
| ES483321A1 (en) | 1980-09-01 |
| DK153480A (en) | 1980-04-10 |
| AU535935B2 (en) | 1984-04-12 |
| EP0015289A1 (en) | 1980-09-17 |
| JPS55500697A (en) | 1980-09-25 |
| IT7968658A0 (en) | 1979-08-10 |
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