JPH0158521B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention provides a method for controlling peripheral devices connected to a programmable controller (hereinafter referred to as a PC), and more specifically, a general-purpose method that includes a program cassette for information exchange (hereinafter referred to as a cassette). The present invention relates to a control method for preventing malfunctions in peripheral devices such as programming devices and recording devices. (Prior art) Peripheral devices such as programming devices and recording devices connected to PCs have traditionally been dedicated to each PC model, but recently some internal structures have been divided into cassettes, and large Peripheral devices that have common parts and are designed for general use are being put into practical use (Japanese Unexamined Patent Publications Nos. 57-206965 and 57-206966). FIG. 1 shows an example of such a general-purpose portable programming device. In the figure, the main body of the device indicated by 1 is provided with a cassette mounting section 3 in addition to a group of various keys 2. A cassette 4 for information exchange is attached to the attachment section 3. As shown in FIG. 2, the cassette 4 comprises ROM memory sections 5, 5 containing an information exchange program and a connector 6, and a dedicated one is prepared for each type of PC. As shown in FIG. 3, the internal structure of the programming device is such that the device body 1 includes a
11 and a ROM containing the system control program
A memory section 12, a RAM memory section 13 which is an auxiliary register, a RAM memory section 14 which is a sequence program file register, a keyboard section KYB15 and its input section KI16, and a character display section CD17 and its output section CO.
18, a circuit pattern display section CID19 and its output section CIO20, an information transmission section TRN21 for exchanging information with the PC, and a buffer 22 also for exchanging information, and the cassette 4 has the above-mentioned information exchanger. It is equipped with a ROM memory section 5 containing programs. Each of the memory sections is divided into address space regions shown in FIG. 4. That is, the system control program area D1 is stored in the ROM memory unit 12, the system auxiliary register area D2 and the information exchange program auxiliary register area D3 are stored in the RAM memory unit 13, and the sequence program file register area D4 is stored in the RAM memory unit 13.
The RAM memory section 14 and the information exchange program area D5 are stored in the ROM memory section 5, respectively. With this configuration, when the information exchange cassette 4 dedicated to each type of PC is installed in the apparatus main body 1, control is transferred from the system control program area D1 to the information exchange program area D5, and the information of various PCs is stored according to a predetermined standard. It is converted into circuit information, which makes it possible to program various PCs with a unified configuration. In addition, in the case of other general-purpose peripheral devices such as a programming device with a CRT display, a programming device with a liquid crystal display, or a recording device, the basic configuration is the same as that of the portable programming device, and all of them exchange information divided into cassettes. It has a program area for However, in order to operate the general-purpose peripheral devices described above normally, it is necessary to install a cassette that is compatible with each peripheral device, but since there are many cassettes to be prepared and the cassette shapes are the same, Traditionally, it has often been the case that an incompatible cassette has been installed, which not only causes peripheral devices to not work properly, but also causes abnormal communication to occur on the connected PC, which can have a negative impact. , had become a problem. (Object of the Invention) In view of the above-mentioned problems of the prior art, the present invention promptly reports the error even if an unsuitable cassette is mistakenly attached to the main body of the device, thereby improving the safety and reliability of the device. The purpose of this study is to obtain a control method for general-purpose PC peripheral devices that can be used safely. (Structure of the Invention) The purpose is to first confirm the validity of the recognition code and model code set on the cassette side in the system control program area within the main body of the device;
Next, the validity of the model code set on the device main body side is confirmed in the information exchange program area in the cassette, and after such mutual confirmation, control is transferred to the original processing program. It is achieved by doing so. (Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings. A feature of the present invention is that, in addition to the configuration of the conventional general-purpose peripheral device, each peripheral device and the cassette 4 are provided in a system control program area D1 in the device body 1 and an information exchange program area D5 in the cassette 4. The point is that a unique code is set in advance to mutually confirm whether the type and the type are compatible. That is, as shown in FIG. 5, the address AKWD1 of the system control program area D1 contains the model code KWD, which is commonly defined for all general-purpose peripheral devices.
1. On the other hand, as shown in FIG. 6, the information exchange program area D5 includes:
The address AKWD2 is an area that stores the similarly defined identification code 20...03, which indicates that the cassettes 4 supplied between the entrance address A4+1 and a specific number of addresses A4+10 are suitable for general-purpose peripheral devices. Similarly, areas for storing the commonly defined model code KWD2 are provided, and these areas are fixed as non-volatile memory. Here, the model codes KWD1 and KWD2 are unique codes set for each peripheral device, as shown in Tables 1 and 2, for example.

【table】

Claims (1)

[Claims] 1. Set a device-specific model code in the system control program area within the device body, and also set an identification code indicating that it is for a general-purpose peripheral device and which device it is for in the information exchange program area divided into cassettes. First, the validity of the recognition code on the cassette side and the model code is confirmed in the system control program area, and then the model code on the device main body side is set in the information exchange program area. confirm the validity of
A method for controlling a general-purpose PC peripheral device, which is characterized in that the control is then transferred to the original processing program.