CN2537998Y - Multifunctional digital code display meter - Google Patents
Multifunctional digital code display meter Download PDFInfo
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- CN2537998Y CN2537998Y CN 02222265 CN02222265U CN2537998Y CN 2537998 Y CN2537998 Y CN 2537998Y CN 02222265 CN02222265 CN 02222265 CN 02222265 U CN02222265 U CN 02222265U CN 2537998 Y CN2537998 Y CN 2537998Y
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Abstract
The conventional PLC can not display the simulating quantity in numbers which is inconvenient for application. The utility model consists of an instrument shell, a displaying panel, a displaying circuit board, a main board and a connecting terminal installed on the back of the shell. The main board is installed with MCU, a watching dog and a digital diving and displaying integrated circuit. The utility model is characterized in that: the quantity signals of the four switches of the outer device are sent to the input circuit of the outer joint on the main board through the four connecting terminals on the instrument back. The circuit is consisted of a bridge rectifier, unidirectional optoelectronic isolation and MCU. The signals are sent into the interruption input terminal of the MCU through the serial input synchronous signal detecting circuit of the BCD code of the four lines of P <1>, P<2>, P<3> and P<4> which are combined by IC 2 Four-2 input circuit or gate circuit. So the synchronous signal and the data signal are quickly distinguished and the displaying problem of the PLC simulating quantity is solved. The utility model has the advantages of simple connecting mode, fast speed of display renovating, easy programming, being convenient for operation, low manufacturing cost and being suitable for the displaying of multi instrument connected, etc.
Description
Technical field
The utility model relates to a kind of digital indicator gauge, definitely says so to relate to a kind of read out instrument that can show or change Programmable Logic Controller (being called for short PLC) or programmable calculator (being called for short PCC) internal data or running parameter, can receive other opertaing devices (for example computing machine, single-chip microcomputer, DCS, FCS, PCS etc.) control requirement and demonstration corresponding data or running parameter.
Background technology
In industrial automation control field, automatic control product with the fastest developing speed surely belongs to Programmable Logic Controller PLC or programmable calculator PCC, has been widely used in automatic field at present.But, because conventional PLC generally only has the input/output state of switching value, analog quantity to indicate, there is not analog quantity numeral Presentation Function, this makes troubles just for some data that needs to move in the demonstration PLC internal processes.Existing solution is: a, the parallel display of the outfit binary-coded decimal of depositing with lock; B, outfit I
2The digital indicator gauge of C bus or SPI synchronous serial bus technology; C, employing PLC specialized simulation amount output module drive standard digital panel table; The man-machine interface of d, employing touch-screen; E, employing microsystem ten configuration softwares.Adopt the binary-coded decimal of the depositing with lock display that walks abreast, will use PLC8 transistor output point at least, add 4 bit parallel displays, cost an arm and a leg, use inconvenience for showing 4 bit data.The peripheral display device of PLC adopts I
2The data presentation table of C bus or SPI synchronous serial bus technology has following deficiency: 1. such table adopts step-by-step transmission data mode, and the transmission pulse number is too many, shows that refresh rate is slow, is unfavorable for that multilist shows; 2. because the PLC program operation speed is restricted, guarantee that by improving serial transmission speed the refresh rate of indicator gauge is limited; 3. programming is inconvenient, adopts PLC specialized simulation amount output module to drive standard digital panel table, and this mode need dispose expensive D/A module, and except that D/A itself exists the transformed error, also there is following fatal shortcoming in it:
, shows signal is subject to disturb;
, indication range and expression quantities be limited, has interference just to cause bigger display error slightly;
, instrument interchangeability poor, need regularly carry out metering instrument;
, must configuration PLC analog output module, cause the cost height.As for adopting d, e mode, though be display mode preferably, but because most of application scenarios do not need too many function, and be not suitable under some occasion using, add that price is too high, in a lot of projects, be limited to use.
Summary of the invention
Goal of the invention of the present utility model is: solve service data in the present Programmable Logic Controller PLC internal processes and show the practical problems that exists, for the user provide a kind of connected mode simple, show that refresh rate is fast, programming is convenient, satisfy opertaing devices such as PLC, PCC, DCS, single-chip microcomputer, computing machine and drive, directly show its inner various service datas, easy and simple to handle, multifunctional digital code Displaying Meter that cost of manufacture is cheap.
Goal of the invention of the present utility model realizes by implementing following technical proposals:
A kind of multifunctional digital code indicator gauge: by instrument housing, be contained in the display panel on this housing front-side frame, be close to it and be loaded on enclosure interior, plate face numeral, the light beam display circuit board that the digital displaying block of LED or light beam, luminous point display module constitute is housed, be contained in display driver circuit interface on the display circuit board and control bus interface X2, X3, X4, be contained in display panel below and be used to constitute the touch button of man-machine dialog interface, be contained in the main circuit board of enclosure interior and the assemblies such as connection terminal at this instrument housing back and constitute; On main circuit board, be equipped with: the IC1MCU microprocessor, offer IC1 MCU electrification reset, watchdog function and preservation instrumentation parameter are not lost after power down, guarantee the special IC IC4 of IC1 MCU reliably working, receive the video data that IC1 MCU transmission comes, and be converted into to drive and light digital piece of LED or light beam, the number of luminous point electric signal drives and shows integrated circuit (IC) 3, the IC3 output signal is connected to display interface terminal X2 on the main circuit board, and there is part input and output link to be connected in main circuit board X3 with IC1 MCU, X4, both can on display board, increase drive integrated circult again and satisfy more driving capacities of display, can receive other control signal of sending on the display board again and give IC1 MCU, the bus interface of the order request of needs when satisfying man-machine conversation, and provide the photoelectric isolated chip operating voltage, and satisfy it and on IC1 MCU interface, draw build-out resistor row RPI, it is characterized in that: by four connection terminals in instrument back, 4 switching value signals of external unit are sent on the main circuit board through X1, external drive equipment is exported 4 line serial binary-coded decimal signals, and being housed, bridge rectifier circuit adds common unidirectional photoelectric isolated chip on main circuit board, they form the external interface input circuit that input end is connected with IC1 MCU, with P in this circuit
1P
2P
3P
4Four incoming line signals are corresponding one by one with external drive equipment incoming line state, but phase place is opposite, by the P that is made up of IC2 four-2 input OR circuit
1P
2P
3P
4Four line binary-coded decimal serial input sync signal testing circuits, and with this synchronous detection signal input IC1 MCU interrupting input end, with quick differentiation synchronizing signal and data-signal.
Its additional technical feature is: 1. be equipped with on main circuit board and can satisfy communication interface integrated circuit (IC) 5, ICA, ICB and the ICC that uses RS-485, CAN BUS, RS-422, RS-232 data communication method and external unit communication, control; When needs RS-485, CAN BUS communication function, the corresponding chip IC 5 of just on its mounting receptacle, packing into; Need RS-422, the RS-232 communication function corresponding chip IC A～ICC that just packs into; Only need PLC switching value driving interface, then said chip needn't be installed; 2. instrument be provided with in the connection terminal behind is connected with golden finger plug X1 on the mainboard, can satisfy external unit and leak and drive or the source type of drive drives the driving selection terminal CS of this instrument, but this table of common ground that connects the external drive loop as CS is with regard to the reception sources drive signal, be that the source drives effectively, connect the public power anode in external drive loop as CS, this table just can receive leakage drive signal, promptly leaks to drive effectively; 3. instrument be provided with in the connection terminal behind with mainboard on golden finger plug X
1What connect finishes the instrument gating end SS that selects the work of multilist conllinear, cooperates the CS end, and effective as SS, this instrument normally can receive 4 bit serial binary-coded decimal information, and when SS is invalid, this instrument stops to receive any information.
Principle of work of the present utility model is as follows:
Instrument power supply, by what be connected with golden finger plug X1 on the mainboard, be contained in the external power supply terminal VCC in the instrument connection terminal behind, to photoelectric isolating circuit, the communication interface circuit, interrupt circuit, microprocessor and house dog and EERPOM circuit provide working power, and the input interface loop of external units such as instrument and PLC, can be by being connected with golden finger X1 on the mainboard, be contained in the data input pin of the external drive equipment in the instrument connection terminal behind, 4 switching value input ends of serial binary-coded decimal just, through exchanging photoelectric isolating circuit or communicating circuit to microprocessor IC1 MCU transmission command, data, microprocessor obtains order and data after decoding, export by the SPI synchronous serial bus according to specific program and algorithm, drive digital the driving and show integrated circuit (IC) 3 and interface bus X2, X3, X4, drive digital the demonstration and light beam luminous point display module of LED on the display circuit board, by connecting the touch button of control bus to the display circuit board, can send order to microprocessor IC1 MCU, after microprocessor receives order, on the one hand by exchanging photoelectric isolating circuit, communication interface circuit RS-485 or CAN BUS, RS-422, RS-232 gives an order to external unit, simultaneously, microprocessor can also be controlled synchronous serial bus SPI, drive digital the driving and show integrated circuit (IC) 3, drive digital demonstration of display circuit onboard led and light beam luminous point display module and show its operating result, thereby realize the man-machine conversation operation.
Advantage of the present utility model is: instrument housing, outside terminal, main circuit board, display circuit board, display panel structure are simple, and effect is clear and definite.The outward appearance of existing instrument feature, again main circuit module installing plate is arranged, have again and can expand and change the indicating characteristic of instrument and the display circuit board and the display panel of instrument model easily.It is simple to constitute whole meter electronics modular structure, use copper looper both can be through having satisfied the electric interfaces that connects main circuit board and display circuit board, form simultaneously the fixing circuit board front portion of relative position again, the instrument face plate framework that posts the PVC film is inserted the display circuit prelaminar part of this circuit module, again with this electronic module main circuit sheet metal hand, directly golden finger connects on the socket on the insertion meter case, just constitutes the electrically connected whole metering device that possesses external unit joint Terminal and this electronic module.Gauge external equipment connecting mode is pressed connection terminal structure and is formed, principal feature is both can satisfy with the switching value terminal of various external units to connect, avoided distinct device need dispose 9 pins or the 25 pin D type sockets of different stitch definition again, it is convenient to satisfy, connect the requirement of various external units flexibly, both solve the practical problems that the service data demonstration exists in the external unit internal processes such as present Programmable Logic Controller, and had connected mode simple again, show that refresh rate is fast, programming is convenient, easy and simple to handle, cost of manufacture is low, be suitable for multilist and connect the outstanding advantage that directly shows.
Description of drawings Fig. 1 is that the digital Displaying Meter front view 2 of the utility model is RS-485 for the interchange photoelectric isolating circuit structural drawing Fig. 6 as input circuit for interrupt circuit structural drawing Fig. 7 for the utility model circuit theory diagrams Fig. 5 for the utility model structural principle block diagram 4 for the digital Displaying Meter housing of the utility model inner structure synoptic diagram Fig. 3, CAN BUS, RS-422 and RS-232 communication interface circuit diagram Fig. 8 for display driver circuit figure Fig. 9 for house dog and eeprom circuit figure Figure 10 for microprocessor MCU interface on draw level match resistor chain structural drawing Figure 11 for instrument behind on the mainboard that is connected of connection terminal golden finger plug X1 structural drawing Figure 12 for display interface bus structure figure Figure 13 for the digital indicator gauge of 4 binary-coded decimal serials of DDM4A behind connection terminal synoptic diagram Figure 14 be DDM4A1 and DDM4A2 digital display meter mark among the connection terminal synoptic diagram figure behind: 1 is the Displaying Meter housing, 2 is display panel, 3 is touch button (DDM4A, DDM4A1, DDM4A2 does not have this button), 4 is main circuit board, 5 is display circuit board, 6 is digital display module, 7 is LED bars or touch button (DDM4A, DDM4A1, DDM4A2 does not have this button), 8 is golden hand plug X1,9 is logic copper looper, 10 for connecting the instrument behind connection terminal of external drive device data input end, 11 are driving input of employing source or leakage driving input mode selection terminal CS, 12 is external power source input terminal VCC, 13 is the external interface input circuit, 14 for adopting the communication interface IC circuit 5 of RS-485 or CAN BUS, 15 for adopting RS-422, communication interface IC circuit A～ICC of RS-232,16 is interrupt control circuit IC2,17 is IC1 MCD microprocessor, 18 is house dog and eeprom circuit IC4,19 is that digital the driving shows integrated circuit (IC) 3 and show bus X2,20 is the control bus X3 of main circuit board, X4,21 is that LED is digital shows or light beam luminous point display module that 22 is the touch button circuit.
Embodiment
A kind of multi-functional data sign indicating number indicator gauge by instrument housing 1, be contained in the PVC film display panel 2 on this housing front-side frame, is changed outward appearance and instrument model features that different PVC film display panels just can change the indicator gauge display interface.That be close to it and be loaded on the display circuit board 5 of this instrument housing 1 inside, the main circuit board 4 that is loaded on instrument housing inside and this instrument housing formations such as connection terminal 10 behind; Digital displaying block of LED or light beam, luminous point display module 21 wherein are housed to constitute numeral, light beam display part on the display circuit board 5, are contained in the soft-touch type button 3 that display board 2 belows are used to constitute man-machine dialog interface.Also leave display driver circuit interface and control bus interface X2, X3, X4 on this display circuit board 5.Display driver circuit interface and control bus interface they are corresponding with main circuit board 4 by copper looper 9 are connected.Bridge rectifier circuit is housed on the main circuit board 4 adds common unidirectional photoelectric isolated chip composition external interface input circuit 13, be to be connected with the connection terminal 10 at housing back promptly by golden finger plug X1 on the mainboard 4 to gauge external, inside is connected with IC1 MCU input circuit, be connected (for example source driving to satisfy instrument with the isolation of external electrical loop, leak type of drive), external unit type of drive conversion and with the level match requirement of gauge internal circuit, RP1 provides the photoelectric isolated chip operating voltage and satisfies it and draw build-out resistor row on IC1 MCU microprocessor 17 interfaces.The data input circuit that is connected in IC1 MCU microprocessor 17 input ends is connected with IC2 four-2 OR circuit 16 simultaneously, can form four line binary-coded decimal serial input sync signal testing circuits by them, and this signal input IC1 MCU is interrupted the input rapids with quick differentiation synchronizing signal and data-signal.IC4 offers the special IC 18 that IC1 MCU electrification reset, watchdog function and preservation instrument are provided with running parameter, disconnects the running parameter that still can preserve setting after the power supply for a long time with the reliably working that guarantees IC1 MCU and instrument and does not lose.IC3 circuit 19 is to receive the video data that IC1 MCU transmission comes, and these data are converted to can drive the electric signal of lighting the digital piece of LED or light beam, luminous point.The IC3 output signal is connected on the display interface terminal X2 on the main circuit board 4, provides splicing ear with the digital display module of the LED on display board, light beam, luminous point display module 21.It is last with as bus interface that IC1 MCU also has part input, output terminal to be connected in X3, the X4 of main circuit board, they can increase drive integrated circult on the one hand again and satisfy the more capacity of display that drives on display board, on the other hand, can receive other control signals of sending on the display board and give IC1 MCU, to satisfy the order request of man-machine conversation needs.By copper looper 9 interface end corresponding on X2, X3, X4 and the display board is connected.The communication interface circuit 14,15 of the RS-485 that can connect with IC1 MCU, CAN BUS, RS-422, RS-232 also is housed on main circuit board; For this reason, design and leave RS-485, CAN BUS, RS-422, RS-232 communicating circuit mounting receptacle on the mainboard: RS-485, the CAN BUS communication function corresponding chip IC 5 of just packing into if desired, RS-422, the RS-232 communication function corresponding chip IC A～ICC that just packs into if desired.If only need be in switching value driving interface such as PLC, above communication chip just needn't be installed.
The utility model can be made into the digital indicator gauge of DDM series, comprising 4 binary-coded decimal serials of DDMXA indicator gauge, DDMXA1, DDMXA2, the digital indicator gauge of RS-485 communication, the DDMXA3 band touches the digital indicator gauge of knob, and the light beam indicator gauge of expanding with this, and the synthesis display that band is digital, light beam is united demonstration is set instrument.This class indicator gauge all adopts advanced interfacing, is connected with equipment such as all kinds of PLC, computing machines with convenient, can form single table, multilist display system.
This series instrument microprocessor IC1 can adopt the MCU of reduced instruction set computers such as compatible MCS-51 series or PLC; Led drive circuit module I C3 can adopt circuit such as 74HC164, MAX7219, ZLG8279;
This serial indicator gauge adopts LED light emitting diode charactron as the demonstration source.Can suitably revise software, change the display board part as required, just can finish 4～8 figure places and show that numerical value and luminous point (post) show.
The copper looper connects main circuit board, display board interface, satisfies electric, the mechanical connection of mainboard and display board.Gauge internal display board interface adopts and drives hard connecting line, I
2C bus or SPI synchronous serial satisfy single-chip microcomputer and show integrated circuit with digital the driving.
The digital indicator gauge of 4 binary-coded decimal serials of example 1 DDM4A:
Adopt parallel transmission binary-coded decimal, Serial Control mode, not only have the advance of serial transmission technology and the characteristics of low price, show fast that with it mode of refreshing, succinct programming are user-friendly to simultaneously.
The DDM4A principal feature:
The digital indicator gauge of each piece DDMA can show 4 bit data, and indication range is 0000～9999 and expand 5 special symbols: " one ", " P ", " L ", " H ", " E ".They can be used for respectively representing that " ± ", " pressure ", " low ", " height ", " mistake " wait other symbols.
The radix point of bits per inch sign indicating number pipe all can be lighted or extinguishes by the PLC programmed control, shows accurately, error free, no drift, need not to measure.
Can show the numeral arbitrarily in the PLC internal data register.Need not quantities is changed again, can on the DDM4A table, directly show project data.For example: the collecting temperature signal is 503.3 ℃, and storage temperature collection value is 5033 temperature data among the register D100, deposits the several somes position datas 0002 of corresponding temperature among the D101.Behind the operation display subroutine, promptly show 503.3 on the corresponding DDM4A table.
Adopt PLC transistor switch amount output point to drive DDM4A, a table only needs 4 switching value output points, and instrument of later every increase only needs to increase instrument gating PLC switching value output point and gets final product.Therefore under the multilist connected mode, this kind instrument will show its superior characteristic.
General PLC all possesses binary-coded decimal instruction or binary arithmetic instruction, and the display subroutine that is added is simple, and travelling speed is very fast.Instruct easy-to-understand.Adopt the rational switching value delivery outlet of configuration as PLC, do not influencing the synchronous demonstration that people are accustomed to very easily reaching under the vision tens tables.For example: under the situation of no interruption subroutine, system's cycle of operation is 40ms, uses 24 switching value outputs to drive 32 DDM4A tables, and total data refreshes once only needs 8 * 40=320ms.As seen display speed is fast.
Device general introduction and parameter
The multifunctional digital code indicator gauge is to be core with the singlechip technology, shows multiple digital by the group of four figures pipe on the panel.The bore size of this table is 91mm (wide) * 43mm (height).
The connection terminal position, behind of digital indicator gauge and terminal number and corresponding function see the following form
| Terminal number | Title | | Remarks | |
| 1 | | Input port | 1 | |
| 2 | | Input port | 2 | |
| 3 | | Input port | 3 | |
| 4 | | Input port | 4 | |
| 5 | CS | The | 6mA | |
| 6 | GND | | ||
| 7 | SS | Type selecting | It is imported that SS=+24V leaks imported SS= | |
| 8 | +V | The positive supply input | I type :+5V/110mA II type :+5V/44mA |
The major parameter of the digital indicator gauge of DDM4A is as follows:
Working power: DC4.8V～5.2V;
Power consumption: I type table ... 550mW;
II type table ... 220 mW;
Show specification: word is high by 0.8 " * 4;
Be suitable for PLC: all PLC;
Transmitting range:＜30M;
Interface signal: source, drain transistor;
The radix point display mode: floating-point able to programme shows;
The PLC drive pattern: 4 figure place sign indicating numbers show, 4 I/O mouths, and 16 recurrence intervals refresh;
Pulse width:＞2ms;
Refresh time:＞14 * 2ms;
BCD controlling and driving electric current: 5mA
Operating temperature range :-20 ℃～40 ℃
Operating humidity range: 10～90% relative humidity;
Physical dimension: wide by 96 * high by 48 * dark 112mm;
Weight: 0.12kg;
Example 2 DDM4A1 principal features:
The digital indicator gauge of each piece DDMA1 can show 4 bit data, and indication range is 0000～9999 and expand 5 special symbols: " one ", " P ", " L ", " H ", " E ".They can be used for respectively representing that " ± ", " pressure ", " low ", " height ", " mistake " wait other symbols.
The radix point of bits per inch sign indicating number pipe all can be lighted or extinguishes by the PLC programmed control, shows accurately, error free, no drift, need not to measure.
Can show the numeral arbitrarily in the PLC internal data register.Need not quantities is changed again, can on the DDM4A1 table, directly show project data.
Adopt 485 communication modes, connected mode is mainly:
A, PLC+485 communication modes: for example FX2N+485-BD, S7 200 RS485 free interface communications;
B, PL+232 change 485 communication modes;
485 communication modes are changeed in c, computing machine configuration software+232.
Because common PLC all possesses serial communication, DLL (dynamic link library), connects as a plurality of operating offices so can make full use of this mouth, the display subroutine that is added is simple, and travelling speed is very fast.Instruct easy-to-understand.Do not influencing the synchronous demonstration that people are accustomed to very easily reaching under the vision tens tables.
This indicator gauge is core with the singlechip technology, shows multiple numeral by the group of four figures pipe on the panel.The bore size of this table is 91mm (wide) * 43mm (height), the connection terminal position, behind of this table and terminal number and corresponding function such as following table:
| Terminal number | Title | Functional definition | Remarks | |
| 1 | A | The RS-485A line | ||
| 2 | B | The RS-485B line | ||
| 3 | | Terminal resistance | ||
| 4 | SET | The change | 6mA | |
| 5 | SEL | Parameter is selected | | |
| 6 | GND | | ||
| 7 | SS | Type selecting | It is imported that SS=+24V leaks imported SS= | |
| 8 | +V | The positive supply input | I type :+5V/110mA II type :+5V/44mA |
The major parameter of the digital indicator gauge of DDM4A1 is as follows:
Working power: DC4.8V～5.2V;
Power consumption: 220mW;
Show specification: word is high by 0.8 " * 4;
The scope of application: all band communication interfaces and PL computer system that can free communication;
Transmitting range:＜1200M;
Interface signal: RS-485;
The radix point display mode: floating-point able to programme shows;
Connect maximum number: 32;
4800,9600,19200bps is optional communication speed:;
Communication format: 8 bit data positions, 1 start bit, 1 position of rest, no parity check position;
Parameter is provided with pattern: communication speed is selected, the station address setting;
Operating temperature range :-20 ℃～40 ℃;
Operating humidity range: 10-90% relative humidity;
Physical dimension: wide by 96 * high by 48 * dark 112m;
Weight: 0.12Kg
Example 3 DDM4A2:
Utilize MODBUS Communication Control mode, adopt master-slave communication mode (point-to-multipoint) on a connection, can connect the digital indicator gauge of 32 DDM4A2 at most.
The DDM4A2 principal feature:
The digital indicator gauge of each piece DDMA2 can show 4 bit data, and indication range is 0000～9999 and expand 5 special symbols: " one ", " P ", " L ", " H ", " E ".They can be used for respectively representing that " ± ", " pressure ", " low ", " height ", " mistake " wait other symbols.
The radix point of bits per inch sign indicating number pipe all can be lighted or extinguishes by the PLC programmed control, shows accurately, error free, no drift, need not to measure.
Can show the numeral arbitrarily in the PLC internal data register.Need not quantities is changed again, can on the DDM4A2 table, directly show project data.
Adopt 485 communication modes, connected mode is mainly:
A, PLC+485 communication modes: for example FX2N+485-BD, S7 200 RS485 free interface communications;
B, PL+232 change 485 communication modes;
485 communication modes are changeed in c, computing machine configuration software+232.
Because common PLC all possesses serial communication, DLL (dynamic link library), connects as a plurality of communication slave stations so can make full use of this mouth, the display subroutine that is added is simple, and travelling speed is very fast.Instruct easy-to-understand.Do not influencing the synchronous demonstration that people are accustomed to very easily reaching under the vision tens tables.
Connection terminal position, behind of this table and terminal number and corresponding function such as following table:
| Terminal number | Title | Functional definition | Remarks | |
| 1 | A | The RS-485A line | ||
| 2 | B | The RS-485B line | ||
| 3 | C | Terminal resistance | If number of connection is more and there is interference in work, just with C end and the disconnecting of | |
| 4 | SET | The change | 6mA | |
| 5 | SEL | Parameter is selected | | |
| 6 | GND | | ||
| 7 | SS | Type selecting | It is imported that SS=+24V leaks imported SS= | |
| 8 | +V | The positive supply input | I type :+5V/110mA II type :+5V/44mA |
The major parameter of the digital indicator gauge of DDM4A2 is as follows:
Working power: DC5V ± 2%;
Power consumption: 220mW;
Show specification: word is high by 0.8 " * 4;
The scope of application: all band communication interfaces and PL computer system that can free communication;
Transmitting range:＜1200M;
Interface signal: RS-485;
The radix point display mode: floating-point able to programme shows;
Connect maximum number: 32 of common modes; Add the RS-485 interrupter and can reach 128;
4800,9600,19200bps is optional communication speed:;
Communication format: 8 bit data positions, 1 start bit, 1 position of rest, no parity check position;
Parameter is provided with pattern: communication speed is selected, the station address setting;
Operating temperature range :-20 ℃～40 ℃;
Operating humidity range: 10-90% relative humidity;
Physical dimension: wide by 96 * high by 48 * dark 112m;
Weight: 0.12Kg
Example 4 DDM4A3 principal features:
The radix point of bits per inch sign indicating number pipe all can be lighted or extinguishes by the PLC programmed control, shows accurately, error free, no drift, need not to measure.
Can show the numeral arbitrarily in the PLC internal data register.Need not quantities is changed again, can on the DDM4A3 table, directly show project data.For example: the collecting temperature signal is 503.3 ℃, and storage temperature collection value is 5033 temperature data among the register D100, and the scaling position data 0002. of depositing corresponding temperature among the D101 need not to move other program, promptly show 503.3 on the DDM4A3 table.
Can revise states such as PLC internal data register, timer, counter and switching value output, auxiliary reclay by communication interface.
Adopt RS-485 or RS-422, the corresponding communication interface of RS-232 communication modes to be connected with PLC;
A, obtain by the PLC internal data of DDM4A3 appointment and be presented on the digital display panel of such table;
B, by the light touches button on the DDM4A3, can select, show and revise by DDM4A3 and go up PLC internal data register, the time register of appointment, the size of data and the various switching value state of counter;
C, cooperation PLC working procedure are finished operations such as low cost, simple man-machine conversation.
The major parameter of the digital indicator gauge of DDM4A3 is as follows:
Working power: DC4.8V～5.2V;
Power consumption: 220mW;
Show specification: word is high by 0.8 " * 4;
The scope of application: all band communication interfaces and PLC, computer system that can free communication;
Transmitting range:＜1200M;
Interface signal: RS-485 or RS-422, RS-232 can select;
The radix point display mode: floating-point able to programme shows;
Connect maximum number: 32;
4800,9600,19200bps is optional communication speed:;
Communication format: can select according to the PLC communication format;
Parameter is provided with pattern: communication speed selection, station address setting, data register are set 1～10 group, open
1～10 group of pass amount setting state;
Operating temperature range :-20 ℃～40 ℃;
Operating humidity range: 10-90% relative humidity;
Physical dimension: wide by 96 * high by 48 * dark 112m;
Weight: 0.12Kg.
Claims (4)
1, a kind of multifunctional digital code indicator gauge, by instrument housing (1), be contained in the display panel (2) on this housing front-side frame, be close to it and be loaded on enclosure interior, the plate face is equipped with digital displaying block of LED or light beam, the numeral that luminous point display module (21) constitutes, light beam display circuit board (5), be contained in display driver circuit interface and control bus interface X2 on the display circuit board, X3, X4, be contained in display panel below and be used to constitute the touch button (3) of man-machine dialog interface, be contained in the main circuit board (4) of enclosure interior and connection terminal assemblies such as (10) composition at this instrument housing back; On main circuit board (4), be equipped with: IC1 MCU microprocessor (17), offer IC1 MCU electrification reset, watchdog function and preservation instrumentation parameter are not lost after power down, guarantee the IC4 special IC (18) of IC1 MCU reliably working, receive the video data that IC1 MCU transmission comes, and be converted into to drive and light digital piece of LED or light beam, the digital driving of the IC3 of luminous point electric signal shows integrated circuit (19), the IC3 output signal is connected to display interface terminal X2 on the main circuit board (4), and there is part input and output link to be connected in X3 on the main circuit board with IC1MCU, X4, both can on display board, increase drive integrated circult again and satisfy more driving capacities of display, can receive other control signal of sending on the display board again and give IC1 MCU, the bus interface of the order request of needs when satisfying man-machine conversation, and provide the photoelectric isolated chip operating voltage, and satisfy it and on IC1 MCU interface, draw build-out resistor row RP1, it is characterized in that: by four connection terminals in instrument back, 4 switching value signals of external unit are sent on the main circuit board through X1, external drive equipment is exported 4 line serial binary-coded decimal signals, and being housed, bridge rectifier circuit adds common unidirectional photoelectric isolated chip on main circuit board (4), they form the external interface input circuit (13) that input end is connected, P in this circuit with IC1 MCU
1P
2P
3P
4Four incoming line signals are corresponding one by one with external drive equipment incoming line state, but phase place is opposite, by the P that is made up of IC2 four-2 input OR circuit
1P
2P
3P
4Four line binary-coded decimal serial input sync signal testing circuits, and with this synchronous detection signal input IC1 MCU interrupting input end, with quick differentiation synchronizing signal and data-signal.
2, according to the described multifunctional digital code indicator gauge of claim 1, it is characterized in that: on main circuit board (4), be equipped with and satisfy IC5, ICA, ICB and the ICC communication interface integrated circuit (14) (15) that uses RS-485, CAN BUS, RS-422, RS-232 data communication method and external unit communication, control; When needs RS-485, CAN BUS communication function, the corresponding chip IC 5 of just on its mounting receptacle, packing into; Need RS-422, the RS-232 communication function corresponding chip IC A～ICC that just packs into; Only need PLC switching value driving interface, then said chip needn't be installed.
3, according to the described multifunctional digital code indicator gauge of claim 1, it is characterized in that: instrument be provided with in the connection terminal (10) behind is connected with golden finger plug X1 on the mainboard, can satisfy external unit and leak and drive or the source type of drive drives the driving selection terminal CS of this instrument, connect the common ground in external drive loop as CS, but this instrument is the reception sources drive signal just, be that the source drives effectively, connect the public power anode in external drive loop as CS, this instrument just can receive leakage drive signal, promptly leaks to drive effectively.
4, according to the described multifunctional digital code indicator gauge of claim 1, it is characterized in that: instrument be provided with in the connection terminal (10) behind with mainboard on golden finger plug X
1What connect finishes the instrument gating end SS that selects the work of multilist conllinear, cooperates the CS end, and effective as SS, this instrument normally can receive 4 bit serial binary-coded decimal information, and when SS is invalid, this instrument stops to receive any information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02222265 CN2537998Y (en) | 2002-04-17 | 2002-04-17 | Multifunctional digital code display meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02222265 CN2537998Y (en) | 2002-04-17 | 2002-04-17 | Multifunctional digital code display meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2537998Y true CN2537998Y (en) | 2003-02-26 |
Family
ID=33700217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02222265 Expired - Fee Related CN2537998Y (en) | 2002-04-17 | 2002-04-17 | Multifunctional digital code display meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2537998Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622832A (en) * | 2012-03-22 | 2012-08-01 | 无锡安东科技有限公司 | Station multitone alarm for automobile production site |
| CN101592944B (en) * | 2008-05-30 | 2013-01-09 | 利亚德光电股份有限公司 | PLC control system of LED display screen |
-
2002
- 2002-04-17 CN CN 02222265 patent/CN2537998Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592944B (en) * | 2008-05-30 | 2013-01-09 | 利亚德光电股份有限公司 | PLC control system of LED display screen |
| CN102622832A (en) * | 2012-03-22 | 2012-08-01 | 无锡安东科技有限公司 | Station multitone alarm for automobile production site |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030226 Termination date: 20100417 |