CN204166523U - A kind of print system - Google Patents

Abstract

The utility model 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.Print system of the present utility model, can ensure the real-time of data and the absolute accuracy of data.

Description

A kind of print system

Technical field

The utility model belongs to automation control area, particularly relates to a kind of print system.

Background technology

Current Mitsubishi automation control system platform slave computer adopts Mitsubishi FX series of PLC, host computer adopts Mitsubishi's touch-screen, be connected with touch-screen by mini-printer by RS232 interface, touch-screen adopts macro instruction that the data that PLC reads are sent 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 needs to send to printer to print by touch-screen (HMI).The real-time of data and the absolute accuracy of data cannot be ensured.The function of touch-screen macro instruction is relatively weak simultaneously, cannot complete complex calculations and control.

Utility model content

The purpose of this utility model is to provide a kind of print system, to overcome deficiency of the prior art.

For achieving the above object, the utility model provides following technical scheme:

The utility model embodiment 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 Mitsubishi FX series of PLC.

Correspondingly, utility model embodiment also discloses a kind of Method of printing, and in Mitsubishi FX 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 write is sent to printer;

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

Compared with prior art, the utility model has the advantage of: print system of the present utility model, the real-time of data and the absolute accuracy of data can be ensured.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

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 utility model specific embodiment;

Figure 3 shows that the data variable defined in the utility model specific embodiment;

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

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

Embodiment

For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.The example of these preferred implementations illustrates in the accompanying drawings.Shown in accompanying drawing and the embodiment of the present utility model described with reference to the accompanying drawings be only exemplary, and the utility model is not limited to these embodiments.

At this, also it should be noted that, in order to avoid the utility model fuzzy because of unnecessary details, illustrate only in the accompanying drawings with according to the closely-related structure of scheme of the present utility model and/or treatment step, and eliminate other details little with the utility model relation.

Shown in ginseng Fig. 2, print system comprises printer, controller and touch-screen.Controller is connected with printer by RS232 interface, and touch-screen is connected 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 field programmable gate arrays (Field Programmable Gate Array, FPGA) etc. ASIC).

In the utility model embodiment, controller is preferably Mitsubishi FX 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 Programmable Logic Controller I/O and to count ratio, inner non-transformer, and power supply used is supplied 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 FX series of PLC inside: input relay X, output relay Y, timer T, counter C, auxiliary relay M, status register S etc.

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

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 write is sent to printer.

S4, by FB function, printing function to be all packaged in FB functional block.Only need dilatory FB functional block can realize the relevant printing of data in a program, facilitate program maintenance.

In sum, print system of the present utility model, can ensure the real-time of data and the absolute accuracy of data.

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

Claims (1)

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

Printer;

Controller, is connected with described printer by RS232 interface, and described controller is Mitsubishi FX series of PLC;

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