CN104077088A

CN104077088A - Printing system and printing method

Info

Publication number: CN104077088A
Application number: CN201410321543.3A
Authority: CN
Inventors: 张冰; 谢赵霞; 周建芳; 王其鳌
Original assignee: ZHANGJIAGANG HUALING MEDICAL EQUIPMENT MANUFACTURING Co Ltd
Current assignee: ZHANGJIAGANG HUALING MEDICAL EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2014-07-08
Filing date: 2014-07-08
Publication date: 2014-10-01

Abstract

The invention discloses a printing system. The printing system comprises a printer, a controller which is connected with the printer through an RS232 interface, and a touch screen which is connected with the controller through the RS422 interface. A printing method is further disclosed. The method comprises the following steps: transmitting a printing request command to the printer by using an M8402 command in a Mitsubishi FX-series PLC (Programmable Logical Controller), wherein M8401 is taken as a mutex; if M8401 is OFF, transmitting data through M8402. By adopting the printing system, the instantaneity of data and the absolute accuracy of data can be ensured.

Description

A kind of print system and Method of printing

Technical field

The invention belongs to automation control area, particularly relate to the write method of a kind of print system, Method of printing and data layout.

Background technology

Mitsubishi's automation control system platform slave computer adopts the FX of Mitsubishi series of PLC at present, host computer adopts Mitsubishi's touch-screen, by RS232 interface, mini-printer is connected with touch-screen, the data that touch-screen adopts macro instruction that PLC is read send to mini-printer, by data-printing out.Data communication and operational process are as shown in Figure 1.

As seen in Figure 1, plc data need to send to printer to print by touch-screen (HMI).Cannot ensure the real-time of data and the absolutely accurate of data.Simultaneously the function of touch-screen macro instruction relatively a little less than, cannot complete complex calculations and control.

Summary of the invention

The object of the present invention is to provide the write method of a kind of print system, Method of printing and data layout, to overcome deficiency of the prior art.

For achieving the above object, the invention provides following technical scheme:

The embodiment of the invention discloses a kind of print system, comprising:

Printer;

Controller, is connected with described printer by RS232 interface;

Touch-screen, is connected with described controller by RS422 interface.

Preferably, in above-mentioned print system, described controller is PLC.

Preferably, in above-mentioned print system, described controller is the FX of Mitsubishi series of PLC.

Correspondingly, inventive embodiments also discloses a kind of Method of printing, and in the FX of Mitsubishi series of PLC, M8402 instruction sends request print command to printer, using M8401 as mutex, if when M8401 is OFF, send data by M8402.

Correspondingly, the invention also discloses a kind of write method of data layout, comprising:

S1, definition data variable;

S2, write printing data format;

S3, the data layout of writing is sent to printer;

S4, by FB function, printing function is all packaged in FB functional block.

Compared with prior art, the invention has the advantages that: print system of the present invention, can ensure the real-time of data and the absolutely accurate of data.

Brief description of the drawings

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Figure 1 shows that the schematic diagram of data communication and operation in prior art;

Figure 2 shows that the schematic diagram of data communication and operation in the specific embodiment of the invention;

Figure 3 shows that the data variable defining in the specific embodiment of the invention;

Figure 4 shows that the printing data format of writing in the specific embodiment of the invention;

Figure 5 shows that the schematic diagram of in the specific embodiment of the invention, the printing data format of writing being issued to printer.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.The example of these preferred implementations illustrates in the accompanying drawings.The embodiments of the present invention of describing shown in accompanying drawing and are with reference to the accompanying drawings only exemplary, and the present invention is not limited to these embodiments.

At this, also it should be noted that, for fear of the details because of unnecessary fuzzy the present invention, only show in the accompanying drawings with according to the closely-related structure of the solution of the present invention and/or treatment step, and omitted other details little with relation of the present invention.

Shown in ginseng Fig. 2, print system comprises printer, controller and touch-screen.Controller is connected with printer by RS232 interface, and touch-screen connects by RS422 Interface and Controler.

Controller can comprise microprocessor (MCU), this MCU can comprise CPU (central processing unit) (Central Processing Unit, CPU), read-only memory module (read-only memory, ROM), random memory module (random access memory, RAM), time block, digital-to-analogue conversion module (A/D converter) and plural I/O port.Certainly, controller also can adopt the integrated circuit of other form, as: application-specific IC (Application Specific Integrated Circuit, or on-the-spot programmable gate array (Field Programmable Gate Array, FPGA) etc. ASIC).

In embodiments of the present invention, controller is preferably the FX of Mitsubishi series of PLC (programmable logic controller (PLC)), and FX series Programmable logic Controller (PLC) is made up of elementary cell, expanding element, expansion module and special function unit.Elementary cell (Basic Unit) comprises CPU, storer, input and output and power supply, is PLC major part.Expanding element (Extension Unit) is the device of counting for increasing Programmable Logic Controller I/O, and inside is provided with power supply.Expansion module (Extension Module) is counted for increasing Programmable Logic Controller I/O and is changed the Programmable Logic Controller I/O ratio of counting, inner non-transformer, and power supply used is supplied with by elementary cell or expanding element.Because expanding element and expansion module are without CPU, must use together with elementary cell.Special function unit (Special Function Unit) is the device of some special purposes.

There are many devices with difference in functionality Mitsubishi's FX series of PLC inside: input relay X, output relay Y, timer T, counter C, auxiliary relay M, status register S etc.

The FX of Mitsubishi series increases RS232 communication port, is connected with printer.PLC and touch-screen are by the RS422 communication port communication carrying.Use M8402 instruction in the FX of Mitsubishi series of PLC to send request print command to mini-printer, using M8401 as mutex (idle signal).If when the printer free time (M8401 is OFF), send data by M8402.Real-time and the accuracy of data are ensured.

The data layout that will print adopts the senior statement of ST to write, and comprises the steps:

S1, definition data variable, shown in ginseng Fig. 3.

S2, write printing data format (ST statement), shown in ginseng Fig. 4.

S3, the data layout of writing is sent to printer.

S4, by FB function, printing function is all packaged in FB functional block.The relevant printing that only need to draw FB functional block and can realize data in program, facilitates program maintenance.

In sum, print system of the present invention, can ensure the real-time of data and the absolutely accurate of data.

Finally, also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.

Claims

1. a print system, is characterized in that, comprising:

Printer;

Controller, is connected with described printer by RS232 interface;

Touch-screen, is connected with described controller by RS422 interface.

2. print system according to claim 1, is characterized in that: described controller is PLC.

3. print system according to claim 2, is characterized in that: described controller is the FX of Mitsubishi series of PLC.

4. the Method of printing of print system claimed in claim 3, is characterized in that: in the FX of Mitsubishi series of PLC, M8402 instruction sends request print command to printer, using M8401 as mutex, if when M8401 is OFF, send data by M8402.

5. the write method of data layout in print system described in claim 3, is characterized in that, comprising:

S1, definition data variable;

S2, write printing data format;

S3, the data layout of writing is sent to printer;

S4, by FB function, printing function is all packaged in FB functional block.