JPS59160297A - Plant monitor controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a ground monitoring and control device equipped with a CRT display device and a print output device connected to a microcomputer.

[Technical background of the invention]

FIG. 1 shows the connection configuration of the CPU section of a microcomputer and its peripheral devices. The common path 2 of the CPU section 1 is connected to the control section 5 (hereinafter referred to as printer controller) of the print output device 4 and the C.
An RT display device 60 control unit 7 (hereinafter referred to as a CRT unit) is connected. In this method, when displaying an image on the CRT display device 6 or printing out an image on the printer output device 4, the data and format to be output from the CPU section 1 are usually sent to the printer controller and the CRT controller. It is. In other words, when displaying on a CRT or printing on a printer, the CPU unit 1 runs a program for that purpose. In general, these print output devices are mainly used to output graphs and tables in a predetermined format, and to copy the screen displayed on the CRT display device 6.

In order to perform this eight-digit copying, it is convenient to directly transfer the image information stored in the CRT scanner and being displayed to the printer controller 5 and print it out, but this job is performed by the 620 Copy 1. . In other words,
Even if a hard copy of the image on the CRT display device 6 is simply required, an eight-hard copy cannot be obtained without the intervention of the 620 copy 1. [Problems in the Background Art] For this reason, the conventional method described above can be applied directly to the microcopy. When applied to a plant monitoring and control device using a computer, the following problems arise.

That is, control devices using microcomputers used for plant monitoring and control, such as sequence controllers, generally use a cyclic processing method (Df program that runs at regular intervals) for monitoring and control.
The time spent on this process increases as the scale of the plant increases. Moreover, since this process is directly connected to plant monitoring and control, it cannot be delayed. Therefore, the execution of programs other than supervisory control becomes public.

The state of program execution at this time is shown in FIG. 2.O Monitoring and control program 9 is executed at regular intervals at each monitoring and control program execution start point 8, and other programs are executed in the remaining time 10. .

During this remaining time of 10, the program for printout described above must be executed.

In this case, if the output of graphs and tables is set as part of the supervisory control program when setting up the system, there is no problem because the processing time can be set in advance. However, since the hard copy of the image is requested by the system user when necessary, there is a limit to the processing with the remaining time of 10 if this number of times is large, so the output of the eight-hard copy is There is a problem in that the operation appears to be very slow.

[Purpose of the invention]

An object of the present invention is to provide a plant that can perform printout without the intervention of the CPU section of the microcomputer when an image on a CRT display device connected to a microcomputer used for plant monitoring and control is to be copied using a printout device. The purpose of the present invention is to provide a monitoring and control device.

[Summary of the invention]

The present invention utilizes a dedicated printer output device that outputs an 8-code copy of an image on a CRT display device connected to a microcomputer that monitors and controls a plant, which is directly connected to a CRT roller, and is connected directly to the is designed to output an octa-ray copy of an image at any time, regardless of the situation.

[Embodiments of the invention]

FIG. 3 shows an embodiment of the present invention.

A common path 2 extends from the CPU section 1 as in FIG. 1, and a memory section 3 and a CRT controller 7 are connected thereto. This CRT controller 7 is connected to the CRT display device 6 and an eight-copy controller 11 for performing eight-copy, and from there a print output device 4 is connected.
is connected to

In this method, the hard copy controller 11 has 620
This is unrelated to part 1 (image information is obtained from the CRT controller 7, and prints are output using the print output device.
A method for connecting the hard copy printer to the RT controller 7 is as follows. In order to make an eight-dot copy, dot information of the image output of the CRT (for color CRTs, dot information for three sheets of red, green, and blue) is required.
”, “o” information).

FIG. 4 shows a configuration diagram of the CRT controller.

An image memory 13 and a CPU interface 14 are connected to the control unit 12, and in order to obtain bit serial dot information 15 to be sent to the CRT display device 6,
The serial information 16 obtained from the image memory 13 is input to the serial converter 17, and the dot clock 18
are shifted sequentially. Here, if the parallel information 16 is input to the 8-copy controller 11 mentioned above,
The dot information of the image output of the CRT display device can be obtained, and the speed required for this transfer is slower than the bit serial data transfer speed by 4 parallels. , the interface conditions become easier.

〔Effect of the invention〕

As described above, according to the present invention, the microcontroller 1? used for plant monitoring and control? , - The printer output device connected to the computer does not require the intervention of the CPU section to obtain a hard copy of the displayed image on the CRT display device, so it can be obtained at high speed without interfering with the execution of the monitoring control function of the CPU section. be able to.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the conventional system, Fig. 2 is a timing diagram showing how a program is executed, Fig. 3 is a block diagram showing an embodiment of the present invention, and Fig. 4 is a CRT controller shown in Fig. 3. It is a block diagram of a troche. DESCRIPTION OF SYMBOLS 1... CPU section, 2... Common path, 3... Memory section, 4... Print output device, 5... Printer controller, 6... CRT display device, 7... CR
T controller, 8... Supervisory control program execution start point, 9... Supervisory control program, 10... Remaining time, 11... Hard copy controller, 12... Control unit, 13... Image memory , 14...CPU interface, 15...Bit serial dot information, 1
6... serial information, 17... motherboard serial converter, 18... dot clock. (7317) Agent: Patent Attorney Noriyuki Chika (
(and 1 other person) Figure 7 Figure 2 δ σ σ σ Figure 3 Figure 4

Claims (1)

[Claims] In a plant monitoring and control device comprising a CRT display device, a printout device, and a microcomputer that displays and outputs monitoring control information to the CRT display device and the printout device while monitoring and controlling the plant, the CR
A dedicated eight-copy controller is directly connected to the controller section of the T display device, and the image output to the CRT display device is directly outputted to the print output device as a hard copy without going through the CPU section of the microcomputer. A plant monitoring and control device characterized by: