CN1067166C - Programmable monitor system using personal computer to make up step diagram - Google Patents

Abstract

The present invention relates to a programmable monitoring system which is applied to a personal computer to construct step diagrams. A step diagram designing function, and an executive function of a programmable controller are set on the personal computer; in addition, archiving in time, printing and full screen monitoring functions are added to become a super control data collection monitoring system. Various control cards are inserted in the personal computer, and various drive interface cards are matched to direct input step diaphragms; control points are set to correspond to logic input and output points; on one hand, the control signal output is executed; on the other hand, set parameters are monitored in a full screen; the step diaphragms can be directly input into computers; the functions of editing, controlling and monitoring are integrated.

Description

Use the programmable monitor system of personal computer to make up step diagram

The present invention relates to a kind of computer application technology, relate to or rather a kind ofly finish the PLC function, and design the programmable monitor system of this function with full screen staircase chart editor with PC.

PLC Programmable Logic Controller and PC have been come out surplus in the of ten year, they in the control field separately independent development.And general PLC Programmable Logic Controller is developed electric slurry type screen especially for full screen shows, adopt independent communication mode, editor's program also needs in addition to import (as disclosed technology in No. the 162359th, the Taiwan patent gazette) one by one with write device, or finish by means of computer, but PLC Programmable Logic Controller itself is not in time deposited functions such as retaining, printing, must connect PC could carry out, and PC need be used C language, Basic or assembly language when finishing these functions, so the general operation personnel are difficult to finish this work.As the survey showed that, majority can not use above-mentioned language among the staff who uses the PLC Programmable Logic Controller and will monitor, in time file, print, in addition training, expense, finish problems such as duration, maintenance in the future, all be that the designer institute of PLC Programmable Logic Controller must consider improved problem.

The objective of the invention is to design a kind of programmable monitor system of using personal computer to make up step diagram, be a kind of with PC directly import staircase chart, can directly do closely, the supervisory system that monitors of control and full screen far away.

System of the present invention moves into PC with the normally independent PLC function of carrying out, and replace the process that PC is used Basic, C, Pascal, assembly language with full screen staircase chart programmable functionality, insert general output input control card, or distant place communication control module, and add that the PLC Programmable Logic Controller can't realize in time deposit retaining, printing and full screen monitoring function, become powerful supervisory system.

So directly import computer in the staircase chart mode, the user is memoric instruction one by one, can directly accept execution by computer, solving computer in the past only makes editing machine, itself can't carry out to change again and pass to the drawback that another independently could be carried out on the PLC Programmable Logic Controller, can monitor on full screen particularly whether the parameter that sets is correct, receive the double effects of direct control and supervision, in addition conversion at any time.

The present invention uses the programmable monitor system of personal computer to make up step diagram, comprise and control, the address, the key-to-disk that data bus connects, microprocessor, the RAM-1 that stores each execution module and computing mode result respectively, the RAM-2 memory, read-only memory, the printer driver interface that is connected with printer, the soft or hard dish control card that is connected with soft or hard dish disk drive, the communication receiving/transmission data-interface, a temporary interface card of the video data that is connected with the full screen monitor and an input, system of the present invention also is provided with respectively and input and control, the address, the control card that data bus connects, have the temporary function of locking, be used for programmed control output input.Control card can be certainly with or without CPU, system of the present invention has photoelectricity coupling array circuit to be connected with input, photoelectricity coupling array circuit input end connects simulation electrical equipment or another photoelectricity coupled circuit that works in the electrical equipment of on off state or work in the degree variable condition, and photoelectricity coupling array circuit output end connects coupled power circuit or relay circuit.

System of the present invention also includes the hardware setting module, the staircase chart editor module, ladder translation and PLC program monitoring module, but the computer control card has the function that the reference mark was used and expanded to elasticity, setting the reference mark with self-defined input mode exports into the reference mark corresponding with logic, and irregular analog quantity is exported into control, then adding the driving interface card carries out, construct staircase chart by keyboard operation by general document editor, the input of realization computer, describe control sequence and set each component parameters, make computer can directly carry out output on the one hand and go into control, can monitor the correctness that sets hardware parameter by screen on the other hand, make the monitoring one.

The point position but function editor's monitored picture of the present invention and demonstration are lived, Automatic Program reads dot address alive and cooperates PLC program practice condition to do monitoring display.

The electrical equipment with on off state of native system comprises that near switch, pressure valve etc. the simulation electrical equipment with degree variable condition comprises thermometer, dynamometer etc., and opertaing device comprises motor, frequency converter etc.Native system also has printing, full screen environment, hard disc except that the human-machine interface function with conventional P LC Programmable Logic Controller, all kinds communication network interface, laser disc, voice, deposit control function such as retaining.

Further specify technology of the present invention below in conjunction with embodiment and accompanying drawing.

Fig. 1 is a system hardware structure frame principle figure of the present invention;

Fig. 2 is a system software structure frame principle figure of the present invention;

Fig. 3 is a hardware setting process flow diagram of the present invention;

Fig. 4 is a staircase chart programming flowchart of the present invention;

Fig. 5 is an element editor process flow diagram of the present invention;

Fig. 6 is ladder translation of the present invention and PLC monitoring process flow diagram;

Fig. 7 is that shelves ladder process flow diagram is carried out in translation of the present invention;

Fig. 8 is a PUSH-POP calculation control flow chart of the present invention;

Fig. 9 is a hardware setting module picture view of the present invention;

Figure 10 is the file administration synoptic diagram of the present invention's translation module able to programme;

Figure 11 is selected interface card kind of the present invention's translation module able to programme and address setting synoptic diagram;

Figure 12 is staged control action program editing figure of the present invention;

Figure 13 is a staged control action program editing picture block diagram of the present invention;

Figure 14 is that control shown after staged control action program editing figure of the present invention files monitors the debug picture.

Referring to Fig. 1, system hardware structure of the present invention comprises key-to-disk 1, full screen monitor 2, soft or hard disk drive 3, printer 4, lead-out terminal 5, input terminal 5 ', the temporary interface card 6 of video data, soft or hard dish control card 7, and reading writing memory 13 (RAM-2) and the read-only memory 14 (ROM) into control card 10, microprocessor 11, the reading writing memory 12 (RAM-1) that stores each execution module, storage computing mode result exported in the programmed control of communication receiving/transmission data-interface 8, printer driver interface 9, latch-type working storage.

Native system staged executive routine can comprise editor module, translation module as shown in Figure 7 and the calculation of order bloc as shown in Figure 8 control module as shown in Figure 5 again.

The programmed control of latch-type working storage is exported into control card 10 among Fig. 1, its input terminal 5 ', connect photoelectricity coupling array circuit (OPTO), can with work on off state and be connected as electrical equipment near switch, pressure valve etc., or be connected with the simulation electrical equipment with degree variable condition such as thermometer, dynamometer (LOAD CELL) etc., also can connect the photoelectricity coupled circuit again.Lead-out terminal 5 also is connected with power circuit, relay by photoelectricity coupling array circuit OPTO, or with the equipment of simulating signal control action, as servo motor, frequency converter etc.

The data information of editor module able to programme and translation module can pre-deposit in the soft or hard disk drive 3, also can record in advance in the ROM14, edits for the user and constructs staircase chart and the instruction that the ladder program translation is become the PLC Programmable Logic Controller use.Structure shown in Figure 1 can finish the ladder program editor, translation, control output input, make full screen and monitor, in time file and function such as printing.15 is address, data among Fig. 1, the bus-bar of control bus.

Referring to Fig. 2, the functional module of native system mainly comprises hardware setting module 20, staircase chart editor module 21 and ladder translation and PLC program monitoring module 23.Wherein, hardware setting module 20 is used to set hardware environment and carries out PLC or ladder editor, can produce the parameter shelves that set after it is set and use for ladder translation and PLC monitoring; Staircase chart editor module 22 can produce the editor's shelves that set, as the control program of ladder translation with the PLC monitoring; The ladder translation enters the PLC program to set shelves in addition with PLC program monitoring module 23, executory control point data 25 are shown in as shown in figure 12 the full screen monitoring environment, this staircase chart and control point 28,26 thereof all can be got by printer, also can in time be archived in the soft or hard disk drive.Ladder translation and PLC program monitoring module 23, also can be used as the driver module of native system and different hardware interface, no matter increase newly in the future what interface or with the special communication of distant place control module, only need to revise or increase this module, therefore existing various PLC all can insert in the native system, and native system has stronger compatibility and open.

Referring to Fig. 3, be hardware setting module process flow diagram, 30 is program entry among the figure, and begins (31) by the parameter that hardware sets, after the information demonstration 32 and keyboard scan after selecting, execution environment setting 33 or staircase chart editor 34 or PLC programmed control supervision 35 or storage/removing show 38.

Referring to Fig. 4, be the staircase chart design flow diagram, 40 is program entry among the figure, after opening beginning data structure and picture and function judgement 41, can select a kind of pattern to carry out by the operator, comprises mode of learning 42, normal design pattern 43 and displaying pattern 44.Wherein mode of learning 42 writes down design processes and deposits another document in, and the user can utilize displaying pattern 44 to show this learning process; Normal design pattern 43 shows this page ladder program 45, the selective function of keyboard scan more earlier; Element editor module 45 often comprises to be opened

, normally closed

Or setting-out (), if its front and back of " OR " logical calculus component kind, the line kind of the good slider position of cloth are automatically up and down then used in setting-out

, file, get shelves, printing, deletion, insertion, copy or shift position module 47 and have direction and referential function; Termination routine 48 returns the female program in upper strata.

Referring to Fig. 5, be element editor process flow diagram, this program is by keyboard scan 41 inputs, by the key 461 that moves to right, move down key 462, on move key 463 and implement the element editors and connect or empty lattice with " OR " computing, reach editor's purpose of staircase chart, and the knowledge of parameter is to be identification code with FLAG surely, by index component library Symbo[] components set of institute's array gives edit structure Src (), the CH () 464 of cursor indication.

Referring to Fig. 6, for flow process is carried out in ladder translation and PLC monitoring, 50 is program entry, reach configuration memory district 5l on inspection, to read the ladder program retaining that to carry out,, open beginning picture 53 with demonstration by translation, inspection ladder program syntax 52, judge 54 by functionality scan and display frame again, show 58 to enter full screen logic monitored space 55 or self-defined picture monitored space 56 or conversion picture 57 or storage data and to remove.

Wherein full screen logic monitored space 55 is to carry out the logic state (as shown in figure 14) that each order bloc produces in derivation calculation mode, judge as output condition, and with 0/1 vacation of represent condition/very, all each dotted state are presented on the screen.Self-defined picture monitored space 56 is set up on their own by the user, arranges the some position (as shown in figure 14) of living that shows voluntarily.The meaning of work point representative is also imported on demand by the user, is shown on the position of this point after the first value with the monitoring point of this program converts with self-defining formula.Conversion picture 57 is used to switch the picture of full screen logic monitored space 55 and automatic picture monitored space 56.After complete full screen logic monitored space 55 or self-defined picture monitored space 56 or conversion picture 57 or storage data and removing show 58, scan the distant place module controls point situation that enters by communication interface 59 again, upgrade the interior condition sign, as the condition of next cycle control.

Referring to Fig. 7, be that translation carries out retaining ladder program flow diagram, carry out by translation that retaining 52 minutes is single to form an order group with multiline mode, whether correct to check grammer, cooperate connecting line kenel 521 before and after the decision logic spare again, if the element that diverges (as

Then be considered as the code name LD of logic components, otherwise be " AND " form, and its operand is placed in the MC () array, be scaled Operand kind 522 (as timer, counter, output point, input point, auxiliary contact, retaining contact etc.) according to its logic components position again.When line elements was " OR " kenel, promptly setting this logic components was ORB, and this operand is placed MC[) in the array 523, current line elements is the fork element, promptly setting this logic components is ANDB, and is ORB with this logic components, and this operand is placed in the MC () array 524.When being an output operand, comply with its kind setting execution output OUT, deposit retaining (SAVEIN), printing (PRINT), codifferential (DIFUP) or following differential (DIFDN) 525, execution is during to last row 526, be converted to immediately in MC () the array memory and carry out control program, be the selected monitored picture 53 of demonstration among Fig. 5, proceed aforementioned operation.

Referring to Fig. 8, Fig. 8 calculates control flow chart able to programme for the PUSH-POP of system, behind selected logic monitored space 55 and self-defined picture monitored space 56, promptly enters calculation control, and step is as follows;

One, reads the flag 565 that control card input working storage is set ram memory-2 (among Fig. 1 13);

Two, read next group MC () array instruction 566;

Three, judge the first operand kind, make Operand present situation flag be in FG () memory cell interior 567;

Four, judge this operand kind, if FG[] be masked as at 0 o'clock, its flag be very/vacation, makes output action;

Five, this output action can enter four kinds of calculation states respectively;

(569) judge OR, ORB, ORI, AND, ANI, ANB, when for one of them, do the computing of FG () flag, do the logical computing with last flag simultaneously, and operation result is placed in the FG ();

(570) when being judged as LD, during 1DI, this group Operand promptly places in the FG ();

(571) when being judged as output during OUT, then judge kind by this group Operand, again flag to be located among the RAM-2 (among Fig. 1 13), output 0/1 is to control card working storage (among Fig. 1 10), sends on the output element that is connected with lead-out terminal (among Fig. 1 5) again.

" very " condition promptly appears in (572) when being judged as codifferential (DIFUP), and rising edge is exported time round-robin pulse; If following differential (DIFDN), promptly " very " condition disappears, and negative edge is exported time round-robin pulse; If " printing " (PRINT) time, then " very " condition occurs, and specific data is flowed to printer; If (SAVEIN) time, " very " condition occurs, and specific data is sent in soft/Hard Magnetic disc player " file ".

Referring to Fig. 9, be native system hardware setting module picture view, its main motion flow is still according to aforementioned structure, step is as follows:

One, start-up routine can read in fill order in the RAM by opening the beginning in soft/hard disc;

Two, set the address 67 of control card;

Three, function opens the output/input service pattern 66 of beginning control card kind, and function control card controlled variable is stored in soft dish or the hard disc 65 earlier with a filename;

Four, enter staged control program editing machine 60, that its control program can be stored in advance is soft/hard disc 3 in (Fig. 1), also can record in advance in ROM14 (Fig. 1), the user edits according to prior planning.

Five, carry out the ladder controlling Design by staircase chart program shown in Figure 4.

Six, element editting function 46 is finished by Fig. 5 flow process, and its staircase chart program is deposited in Src () the structure parameter memory 13 (RAM-2 of Fig. 1)

Be denoted as automatic connecting element logic components

And its output is represented the output point as (OUTR)).

Seven, through above step mule, the ladder program that design is finished deposits storages in the soft or hard dish 3 in by microprocessor 11 (Fig. 1).

Eight, the ladder program can be printed by printer interface.

Nine, enter translation module able to programme (among Fig. 9 61).

1, translation module data able to programme can exist in the soft or hard dish 3 (Fig. 1) in advance, also can record in ROM14;

2, program becomes instruction with user's ladder program translation; Its detailed execution in step as shown in Figure 7, Operand such as timer, counter, output point, input auxiliary contact, retaining contact; Operand is as inserting LD, be inverted into LDI, with AND, with non-ANDI or OR or non-ORI, square and ANB, square or ORB, codifferential DIFUP, following differential DIFDN, output OUT, file SAVEIN, print PRINT; The fork element as

The line symbol; The fork square, promptly the staircase chart of being made up of the fork element is listed as the row of 03 in the letter 12,004, and forms a square (BLOCK) by 800,207,206.

Ten, the staircase chart program of Figure 12 is stored by changing in Src () the structure parameter memory in MC () the array parameter module, the steps include:

1, programmable control module leaves in MC () the array parameter memory 13, and the step cycle through reading, judge, set, export, showing is carried out;

2, program enters in as shown in Figure 6 ladder translation and the PLC monitoring, through keyboard scan 54, select monitoring 55 of full screen logic or the monitoring 56 of self-defined picture or conversion picture 57 or storage data and remove to show 58, to monitor the line data 59 of communication position data or distant place control station, the user can carry out control program able to programme;

3, by the monitoring 55 of full screen logic and self-defined picture monitoring 56 (Fig. 6), with the main executive routine (Fig. 8) of derivation calculation mode as control able to programme, make do action by reading, judge, set, exporting, promptly read the flag of memory 13, read next group MC () array instruction again, and judge the first operand kind, the flag of representing the Operand present situation is stored in the PUSH-FG () memory cell of memory 13, when judging operand, if the index of PUSH-FG () is 0 o'clock, its flag is true/vacation, carries out output.

After ladder program design shown in Figure 12, file, enter Run pattern environment, the operation screen shown in Figure 13, Fig. 14 promptly can occur, wherein;

One, show order bloc after the ladder translation (from Fig. 1 13 read), be presented at circularly (as the STEP TRACE of Figure 14) on the window 80, the user can tracking mode progressively test procedure and execution result;

Two, guiding user utility command pattern 88;

Three, the virtual joints status display area is gone in the output in this control system, can be divided into that memoryless formula virtual joints one is commonly called as inner general auxiliary contact 89 (AUX among Figure 12) and memory type virtual joints one is commonly called as inner freeze mode auxiliary contact, still can keep former logic state after the outage.

Actual input point status display area 81, each input state is 1 byte, equaling 8Bits is 8 inputs, so number 0-7,10-17,20-27 ... its actual relative position is by the 67I/O-CHl of Fig. 9.Inner setting (same position of same Figure 10, Figure 11).And behind selected interface card, this address is with regard to automatic setting, unless more than one of interface card, perhaps its position is special, just needs the user to adjust, and the user is by monitoring this district 81, can understand the input state of the actual contact of extraneous distribution, the time relay contact areas 82 of one hypothesis is the timer district, as shown in figure 14, and in the table 80 promptly from 800 to 807,81 is 810 to 817,810 places are 0#7, and # left side 0 this timer of expression can close (OFF) when 0 state, surplus 0.7 second of 7 expression timing, when timing is 0, left side O transition is 1 (ON), thus timing (ON DELAY) when the timer of native system is out, digit 0.1 second.Count block 83, the total how many times counting operation of record is as the counting control of production quantity.As the count block among Figure 13 83,90 position among Figure 14,90 presentation address 900 to 907,91 expression 910-917, be operational counter, as " 0#21 " at 900 places, expression this passage accumulative total at present has 21 countings, state still is 0 (OFF), does not also reach the counting final value (user need preestablish the control of each counter) of program setting.Actual contact output state viewing area 84 is (as 1=ON among Figure 14,0=OFF), the user can monitor the virtual condition of actual board reference mark action at this picture, in this output area 84,200 expressions 200 to 207,210 expression 210-217 ... according to the position of actual interface card, provide another elasticity usage space to the user.By user-defined display frame 85 point display position alive marked areas, the user enters specific picture with Ctrl-U on demand, in time reflects the reference mark present situation under self-defining picture, is convenient to the user and issues an order rapidly.Viewing area 86 is used to show with current procedure carries out relevant environmental information, avoids providing the situation that wrong parameter is not but known.The operating present situation of display system then shows in 87 districts, makes the user understand that system is in service an inerrancy.

The Presentation Function of above-mentioned picture, after the ladder program translation, carry out voluntarily, have the function of on PC, making stepped design, PLC Programmable Logic Controller, monitoring and result's timely demonstration, file, printing can be provided, and not need from execution such as language design, the man-machine interfaces of controller own.

The present invention not only can also can supply industry member as realizing the automatic tools means for study.

Claims (10)

1, a kind of programmable monitor system of using personal computer to make up step diagram, comprise and control, the address, the key-to-disk that data bus connects, microprocessor, the RAM-1 that stores each execution module and computing mode result respectively, the RAM-2 memory, read-only memory, the printer driver interface that is connected with printer, the soft or hard dish control card that is connected with soft or hard dish disk drive, the communication receiving/transmission data-interface, a temporary interface card of the video data that is connected with the full screen monitor and an input, it is characterized in that: also comprise one with or without CPU, has the temporary function of locking, the control card that is used for programmed control output input is respectively with input and control, the address, data bus connects;

Also including photoelectricity coupling array circuit is connected with input, photoelectricity coupling array circuit input end connects simulation electrical equipment or another photoelectricity coupled circuit that works in the electrical equipment of on off state or work in the degree variable condition, and photoelectricity coupling array circuit output end connects coupled power circuit or relay circuit;

Described soft or hard dish disk drive or read-only memory internal memory contain for setting hardware environment and the hardware setting module of carrying out PLC or ladder editor being provided, and the parameter shelves that generation sets are used for the ladder translation to be carried out with the PLC program monitoring; Storage has the staircase chart editor module, can produce the control program of the translation of the editor's shelves that set and ladder, PLC program monitoring; Store ladder translation and PLC program monitoring module, enter during the PLC program carries out to set shelves, with the reference mark data presentation in the full screen monitoring environment.

2, a kind of programmable monitor system of application personal computer to make up step diagram as claimed in claim 1 is characterised in that it is to adopt following operation steps:

A), fill order is read in the reading writing memory RAM-1 of each execution module by soft or hard dish start-up routine;

B) address of control card is gone in setting program control output;

C) put programmed control and export output into the control card kind/go into mode of operation, and controlled variable is stored in hard disc or the soft dish with a document name;

D) function enters staged control action program editing, edits by the staged control action program that is stored in soft or hard disc player or the read-only memory ROM;

E) make the ladder controlling Design by staircase chart programmable functionality flow process;

F) press element editor flow process, use automatic connecting element, logic components, output and make staircase chart, the staircase chart of finishing is deposited in computing mode result's Src () the structure parameter memory of reading writing memory RAM-2;

G) microprocessor staircase chart that design is finished is sent in the soft or hard dish disk drive and is stored;

H) by printer interface staircase chart is filed by printer prints.

3, the programmable monitor system of application personal computer to make up step diagram according to claim 1, be characterised in that: the described control card that is used for programmed control output input is one to be used for the communication interface at reference mark, a remote control distant place, and reference mark, a described distant place has microprocessor, independent control program and easy I/O port.

4, the programmable monitor system of application personal computer to make up step diagram according to claim 2, it is characterized in that: among the described step f, according to upper and lower, the right button keyed in, with the upper and lower, left and right of this position of " OR " computing, upper right, bottom right, upper left, lower-left component kind value, by operation result index element from the component library of the reading writing memory RAM-2 that is stored in the computing mode result, set again and give the present element of editing, finish the staircase chart editor one by one.

5, the programmable monitor system of application personal computer to make up step diagram according to claim 2, it is characterized in that: in the described steps d, earlier push each reference mark conditional value one by one and be temporary among computing mode result's the reading writing memory RAM-2 in the flag, when making ladder execution computing be output type, use pushdown to take out flag value among computing mode result's the reading writing memory RAM-2, and one by one with " AND " logical operation, press operand kind output result, a cycle period is finished in calculation one by one.

6, the programmable monitor system of application personal computer to make up step diagram according to claim 1 is characterized in that: described ladder translation module is translated into instruction with Operand, operand, fork element, fork square.

7, the programmable monitor system of application personal computer to make up step diagram according to claim 2, it is characterized in that: described staircase chart is changed in MC () the array parameter memory by Src () structure parameter memory in computing mode result's reading writing memory RAM-2, is made for the circulation calculation of reading, judge, set, export, showing.

8, the programmable monitor system of application personal computer to make up step diagram according to claim 7 is characterized in that the described operation steps that reads, judges, sets, exports, shows is;

A) keyboard scan input is selected monitoring of full screen logic or the monitoring of self-defined picture or conversion picture or storage data or removes to show, monitors the line data of address data or distant place control station, provides control able to programme to the user;

B), according to monitoring of full screen logic and the monitoring of self-defined picture, get the calculation mode, from computing mode result's reading writing memory RAM-2, read to set flag and read next group MC () array instruction, judge the first operand kind, Operand present situation flag is stored in computing mode result's the PUSH-FG () memory of reading writing memory RAM-2, PUSH-FG () is 0, and flag is true/vacation, carries out output.

9, the programmable monitor system of application personal computer to make up step diagram according to claim 1 is characterized in that: described ladder translation is carried out with the PLC monitoring, is to check earlier and configuration memory district, to read the ladder program shelves that will carry out; Translate, check the ladder program syntax again, open the beginning picture with demonstration; Judge by functionality scan and display frame again, show to enter full screen logic monitored space or self-defined picture monitored space or conversion picture or storage data or to remove; The monitoring of described full screen logic is to carry out the logic state that each order bloc produces in derivation calculation mode, as the judgement of output condition, and with 0/1 vacation of represent condition/very, all each dotted state are presented on the screen;

The described picture monitored space of making by oneself is the some position of living that is set up, arranged voluntarily on their own demonstration by the user, imports the meaning that the point of living is represented by the user, and program will monitor after point value converts with self-defined formula and be shown on the position of this point;

Described conversion picture is that the picture of full screen logic monitored space and automatic picture monitored space is done to switch mutually;

Described storage data and removing show, are to scan the distant place module controls point situation that is entered by communication interface after execution again, upgrade the interior condition flag, prepare to enter next cycle control.

10, the programmable monitor system of application personal computer to make up step diagram according to claim 2, it is characterized in that: described element editor is imported by keyboard scan, by the key that moves to right, move down key, on move that key is implemented editor's element and serve as connection or empty lattice with " OR " computing, finish the staircase chart editor, and the setting of parameter is identification code with FLAG, by the element of index component library Symbo () array, set and give among edit structure SrC (), the ch () of flag indication.

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