JPS63234302A - Digital controller - Google Patents

Abstract

PURPOSE:To facilitate the exchange and the change of disposition of process input/output cards for a digital controller which selects freely various input/ output cards in response to each input/output signal of an automatic machine, by detecting the coincidence between the address of each process input/output card and the address indicated by an arithmetic unit. CONSTITUTION:An address for selection of process input/output cards 2 is outputted to an address detecting circuit 3 from an arithmetic unit 1 when a process signal is received from the card 2 which is loaded to a backboard 15 or a process signal undergone an arithmetic process is delivered to the card 2. Then an address set previously by an address selection switch 4 is confirmed against said address for selection of cards 2. When the coincidence is obtained between both addresses, the process data is sent to the board 15. The same procedure is carried out also when the process data is fetched from the card 2 connected to the board 15. Then the process data is transferred between both cards 2 having the coincident addresses.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital control device that freely selects and attaches various input/output cards in correspondence with each input/output signal of an automatic machine.

[Conventional technology]

FIG. 2 is a block diagram showing a conventional digital control device disclosed in, for example, Japanese Unexamined Patent Publication No. 61-173309. 12a or the process input/output card 12b, and the execution result data is transferred to the process input/output card 12 mounted on the backboard 15.
a or the process input/output card 12b. Process input/output card 12a or process input/output card 1
2b is provided with an address selection switch 14 for setting the address on the backboard 15 of the process input/output card 12a or the process input/output card 12b, and an address coincidence detection circuit 13, respectively.

Note that the process input/output card 12a or the process input/output card 12b is equipped with a storage medium for transmitting and receiving process data.

Next, the operation will be explained.

When installing the process input/output cart 12a or the process input/output card 12b on the backboard 15, the process input/output card 12a or the process input/output card 12
Each process input/output cart 12a or process input/output cart 1 is selected by the address selection switch 14 provided at b.
2b is connected with an address set here, and each process input/output cart 12a or process input/output card 12b is connected by this address setting.
39 can be connected to any slot position on the backboard 15, and for example, the Y4 calculation unit 11 can send and receive process signals from the process input/output card 12a or the process input/output card 12b installed on the backboard 15, and perform calculations. When outputting the processed process signal to the process input/output card 12a or process input/output cart 12b installed on the backboard 15, the processing unit 11
Process input/output on backboard hts -F 12a
Alternatively, the address for selecting the process input/output cart 12b is output. This address is output to the address matching detection circuit 13 of the process input/output cart 12a or process input/output card 12b via the backboard 15, and is set in advance by the address selection switch 14 of the process input/output cart 12a or process input/output card 12b. The processed process data will be transmitted via the backboard 15 only to the process input/output cart 12a or process input/output car 12b whose addresses match.

On the other hand, when importing process data from the process input/output card 12a or process input/output cart 12b connected to the backboard 15, the same procedure is performed, and the process input/output card (C12a) or process input/output card whose specified address matches -) Send and receive process data only from '12b.

[Problem that the invention seeks to solve]

Since the conventional digital control device is configured as described above, when the process input/output cart 12a or the process input/output cart 12b connected to the backboard 15 is to be replaced or rearranged, the replacement or rearrangement is required. For each conversion process, the address of the process input/output cart 12a or process input/output cart 12b must be set by operating the address selection switch 14 of the process input/output cart 12a or process input/output cart 12b for each side, and the address setting Therefore, there is a problem in that complicated processing is forced, which significantly impedes inspection and maintenance efficiency.

This invention was made to solve the above-mentioned problems, and it eliminates the address setting operation when replacing or rearranging the process input/output card connected to the backboard, so that the process can be easily performed. Means for Solving the Problem of Executing Input/Output Card Replacement or Rearrangement) The digital control device according to the present invention allows each process input/output cart to be replaced via the backboard at a predetermined position on the backboard. An address for accessing each connected process input/output cart is set, and a match between the set address of each process input/output cart and the address instructed by the arithmetic unit is detected for each process input/output cart.

(Function) In the digital control device of the present invention, the address setting means provided for each process input/output card at a predetermined position on the backboard controls each process input/output card of a plurality of process input/output cards connected via the backboard. The address for accessing the output card is set for each process input/output card, and the address detection means matches the address of each process input/output cart set with the address instructed by the calculation unit for each process input/output cart. control the input and output of process data.

r1n spear 11dl An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, l is an arithmetic unit and backboard 1
A predetermined process operation is executed based on the data input from the process input/output card 2 installed on the backboard 15, and the execution result data is output to the process input/output card 2 installed on the backboard 15. The backboard 15 includes an address selection switch 4 serving as an address setting means of the present invention for setting the address of the process input/output card 2, and an address matching detection circuit 3 serving as an address detection means of the present invention.
are provided for each connection slot of each process input/output card 2.

Note that the process input/output cart 2 is equipped with a storage medium for transmitting and receiving process data.

Next, the operation will be explained.

When installing the process input/output card 2 on the backboard 15, the process input/output card 2 can be accessed by the processing unit l using the address selection switch 4 provided at each connection slot position provided at a predetermined position on the backboard 15. Address is set. This address setting allows each process input/output card 2 to be connected to any slot position on the backboard 15. Under such conditions, for example, the processing unit l is connected to the backboard 15.
When transmitting and receiving process signals from the process input/output card 2 installed on the backboard 15 or outputting processed process signals to the process input/output card 2 installed on the backboard 15, the calculation unit l is connected to the backboard 15. The address for selecting the process input/output card 2 is output to. This address is output to the address matching detection circuit 3 provided for each process input/output card connection slot on the backboard 15, and is set in advance by the address selection switch 4 provided for each process input/output card connection slot on the backboard 15. For the process input/output cart 2 whose addresses match, the arithmetic unit l first outputs a selection signal to the corresponding process input/output card 2, and with the interface established, the arithmetic processing is performed. The processed process data is stored on backboard 1.
5 data bus lines.

On the other hand, when taking in process data from the process input/output card 2 connected to the backboard 15, a similar procedure is performed, and process data is sent and received only from the process input/output card 2 whose designated address matches.

In the above embodiment, both the address selection switch 4 and the address match detection circuit 3 are connected to the backboard 1.
5 is provided for each slot for connecting each process input/output card, or only the address selection switch 4 is attached to the backboard 15, and the address match detection circuit 3 is provided for each process input/output card 2. It may also be a configuration.

(Effects of the Invention) As described above, according to the present invention, an address for accessing each process input/output card of a plurality of process input/output cards connected via a backboard is assigned to each process input/output card. An address setting means for setting an address and an address detection means for detecting for each process input/output card whether the address of each process input/output card set by the address setting means and the address instructed by the arithmetic unit match are connected to the backboard. Since it is installed at the specified position on the top of the backboard, when replacing or rearranging the process input/output cart connected to the backboard, there is no need to perform address setting operations for each process input/output card. This provides an excellent effect of efficiently performing process input/output card replacement or rearrangement maintenance operations.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a digital control device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional digital control device. In the figure, ■ is an arithmetic unit, 2 is a process input/output card, 3 is an address match detection circuit, 4 is an address selection switch, and 15 is a backboard. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. (2 others) Figure 1

Claims (1)

[Claims] It has an arithmetic unit that reads process data stored in a plurality of process input/output cards connected via a backboard and performs arithmetic processing, and the processing data processed by this arithmetic unit is transmitted via the backboard. In a digital control device that performs write processing on a connected process input/output card, an address for accessing each process input/output card of a plurality of process input/output cards connected via the backboard is assigned to each process input/output card. address setting means for each process input/output card, and address detection means for detecting for each process input/output card whether the address of each process input/output card set by the address setting means matches the address instructed by the arithmetic unit. A digital control device, each of which is provided at a predetermined position on the backboard.