JPS61150005A - Loader device - Google Patents

Abstract

PURPOSE:To support plural programmable controllers and DDCs (direct digital control) by using one set of loader via a serial bus. CONSTITUTION:The operator designates a PC among PCs (programmable controllers) 2a-2n, 5a, 5b and a loader 11 transmits a request data corresponding to a function of the loader based on a station number. The request data is received by the PC having a coincident station number, the PC returns the response data to the request data to the loader 11, where down/up load of the program of all the PCs and operation display are executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a programmable controller (hereinafter referred to as PO).
The present invention relates to a loader device for storing a control program in a computer.

BACKGROUND OF THE INVENTION In recent years, systems using PCs and DDCs have been developed for process control. Each of these PC'7DDCs uses a dedicated loader device having functions for downloading and uploading programs and displaying the operating status. In the conventional system, one PO or DD
One loader device with functions corresponding to C was installed, and programs were downloaded, uploaded, etc.

Problems to be Solved by the Invention However, if one loader device is provided for one PC or DDC as described above, the number of loader devices will also increase as the number of Pos or DDCs increases. Resulting in.

Furthermore, if a control program is to be stored in a po and a DDC having different functions, it is necessary to provide a loader that can handle the logic operation function of the po and a loader that can handle the numerical operation function of the DDC. Furthermore, if one loader device were to support a plurality of PCs or DDCs, the operator would have to successively change the connection cables connecting the loader device and each PC or DDC.

As mentioned above, when the number of loaders increases, the overall size of the apparatus becomes larger. Furthermore, when the connection cables are successively reconnected to support a plurality of PCs or DDCs with one loader, there is a drawback that the reconnection of the connection cables becomes extremely complicated.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a loader device that can support a plurality of PCs or a PC and a DDC with one loader.

Means and operation of rounding to solve the problem tm The present invention provides (
1) A loader supporting a plurality of programmable controllers having different functions is provided, and data is transmitted and received between the loader and each of the programmable controllers having different functions distributed and arranged in parallel via a serial bus, (2) A loader that supports a programmable controller and a DDC is provided, and data is transmitted and received between the programmable controller and DDC, which are arranged in parallel, and the loader via a serial bus.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention.

In FIG. 1, a plurality of Po, 2a-n having different functions are connected to a lower data bus (serial bus),
? There are 20 groups arranged in parallel via. There are 20 groups located in remote areas.

This PC group has POja with different functions.
, jb are arranged in parallel via a lower data bus (serial bus). 7. Both ♂ indicate data bus exchangers. The PO group/PC group is connected via upper-level data transmission/reception. 10 is PC core a-Jn or POja
, jb and small, lightweight portable programmable loader //
This is a transmission bus interface for sending and receiving data. The portable programmable loader l/ is the PCJa-
Loader supporting CONN and POJA, JB, serial line interface/2, OPU
/J.

Signals are exchanged between the memory card, the key manual interface 151, the display interface 16, and the cassette interface 11 via the OPU path. In the loader l/, /9 is the keyboard J is the display, and 2
/ indicates each cassette.

Next, the operation of the apparatus configured as described above will be described. First, the operator specifies a desired PC among PCJa-n, ja, and jb. Then, based on the station number for the specified pa, the loader // to the PO core
, ja, and jb, request data corresponding to the functions of the loader is transmitted. This request data is received by the PO matching the station number and its pc
returns response data to the request data to the loader l/. In this way, the loader 17 includes all PCs, 2a-n.

It is possible to download and upload programs held by the PO, display the operating status, etc. for ja and jb.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 2 is an explanatory diagram of the configuration of a device that can support a PA, this PC, and a DDC with different functions using one loader. In FIG. 2, the same parts as in FIG. 1 are shown with the same reference numerals, and their explanation will be omitted. - is PO, and the logic operation function of this PC 2-1 is expressed, for example, in a ladder circuit diagram as shown in FIG. 3(a). The sword is a DDC, and the numerical calculation function of this DDCJJ is expressed, for example, in a block diagram as shown in FIG. 3(b). These PCΩ and DDC- are arranged in parallel via a data bus.

In the device configured as described above, when a desired control device number is specified by the operator, the portable grammatical pull loader/1 transmits data for reading the device type via the data bus.

Then, according to the response data, the loader //
A PO support function program mainly consisting of ladder circuits or a DDC support function program mainly consisting of block connections, which is stored in advance in the memory Ij/41- (ROM), is run. In this way, the loader // connects all control devices f(PC)2 and DDCQI) connected to the data bus
You can download and upload programs, display the operating status, etc.

It is assumed that the loader// is small, lightweight, and portable.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained. That is, (1) one loader can support multiple PCs and DDC;
Equipment area can be reduced.

(2) Since the desired PO or DDC can be switched via the data bus, there is no need for the troublesome operation of changing connection cables.

(3) One loader can simultaneously monitor the operating states of multiple PAs.

(4) The operating status of PO and DDC can be monitored simultaneously with one loader.

(5) PCs or DDCs installed in remote locations can be supported by using lower and upper data buses.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing one embodiment of the present invention, FIG. 2 is a configuration explanatory diagram showing another embodiment of the present invention, and FIG. 3 (al
, (Both bl are explanatory diagrams explaining some functions of FIG. 2. Ja-Jn, ja, jb, , 2u-programmable controller, 3.t...lower data bus, 7.♂...・
Data bus exchanger, data bus, upper data bus, IO...
・Transmission lotus interface, /...portable progera! Pull loader, J...DDC. Figure 1

Claims (2)

[Claims] (1) A loader that is characterized by being provided with a loader that supports a plurality of programmable controllers having different functions, and transmitting and receiving data between the loader and each of the programmable controllers having different functions that are distributed and arranged in parallel via a serial bus. Device. (2) A loader device characterized by being provided with a loader that supports a programmable controller and a DDC, and transmitting and receiving data between the programmable controller and DDC, which are arranged in parallel, and the loader via a serial bus.