JPH04205135A - Method and device for displaying hot line insertion and extraction - Google Patents

Abstract

PURPOSE:To enable replacing operation for attaching and detaching a peripheral device by providing a display means which displays whether the peripheral device is under the control of an arithmetic processing means according to constitution definition information. CONSTITUTION:The condition definition information 401 which is updated is read out of a memory 3 by a CPU 1, outputted to a bus 2, and transferred to the input part 30 of the peripheral device 11. At the same time, while control is so performed that a control signal, etc., is not transferred between the CPU 1 and peripheral device 11, the display unit 21 on the peripheral device 11 turns OFF. Namely, it can be confirmed on the side of the peripheral device 11 that the peripheral device 11 is disconnected from the CPU 1. An operator confirms the turning-off state and removes the peripheral device 11 to perform the replacing operation. Consequently, even when peripheral devices are decentralized, their connection states are easily known.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display method and apparatus during hot insertion and removal of a control computer or its peripheral devices.

[Conventional technology]

In a control computer system that includes a CPU and various peripheral devices, and in which these devices are connected through signal lines, replacement of the peripheral devices must normally be performed when there is no access from the CPU.

Conventionally, at the time of replacing a peripheral device, the state in which the CPU is not accessing the peripheral device, that is, the state in which one peripheral device is disconnected from the CPU, can be confirmed only on the CPU side.

[Problem to be solved by the invention]

The above-mentioned conventional technology does not take into consideration the fact that in a control computer system having a CPU and distributed peripheral devices, replacement work is performed while confirming on the peripheral device side that the peripheral device is not accessed by the CPU. . Therefore, the only way to deal with this is to check on the CPU side and, when replacing the device, take sufficient care to ensure that the operator does not accidentally replace other peripheral devices.

Also, in the past, when an abnormality occurred in a peripheral device.

Previously, stopping the CPU stopped the entire system (Bp), but recently a method has been adopted in which the CPU continues to operate, only the peripheral device that caused the abnormality is stopped, and then that peripheral device is replaced. .

In this way, in order to replace only the abnormal peripheral device while distinguishing it from other normal peripheral devices, it is desirable that the five peripheral devices be provided with some sort of display means.

Furthermore, if the wrong peripheral device is replaced, the entire control system may be affected.

The present invention provides a control computer system in which a peripheral device
The purpose is to install a monitor on the peripheral device side that displays whether it is accessible to the PU or disconnected from the CPU, so that peripheral devices can be removed, installed, or replaced while checking the display. shall be.

[Means to solve the problem]

In order to achieve the above object, the present invention is characterized by having configuration definition information indicating whether or not a peripheral device is under the control of a processing unit (CPU), and when replacing a certain peripheral device. includes an input means for inputting a command to rewrite the configuration definition information in order to separate the peripheral device from the arithmetic processing means, a storage means for storing the configuration definition information, and the above-mentioned information stored in the storage means. The arithmetic processing means transfers the configuration definition information to the peripheral device, the information input means imports the configuration definition information into the peripheral device, and the peripheral device is under the control of the arithmetic processing means based on the inputted configuration definition information. and display means for displaying whether or not.

[Effect]

The configuration definition information indicates whether the peripheral device is under the control of the arithmetic processing means. When replacing a peripheral device, the operator inputs a command to disconnect the peripheral device from the arithmetic processing means using the input means, and the information indicates that the peripheral device has been disconnected from the arithmetic processing means. It is rewritten to the information shown. The storage means stores and holds the information, and the arithmetic processing means transfers the information from the storage means to each peripheral device. The transferred information is taken into the information input means of the peripheral device.

The display means performs display based on the information taken into the information manual means.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

The CPUI, which is an arithmetic processing means, reads the configuration definition information 4 stored in the memory 3 and outputs it to the peripheral bags fi[11 to 1n via the bus 2.

As mentioned above, the memory 3 is configured so that the peripheral devices 11 to 1n are connected to the CP
Configuration definition information indicating whether or not each peripheral device is under the control of the UI is stored for each peripheral device. In other words, the configuration definition information 4 corresponds to each peripheral device 11...1n, and its CPT
The connection status with JI is stored as definition information 402 of 1 or 0. In the case shown, only the peripheral device 11 is the CPU
and is in the connected state (1), and the others are in the disconnected state (0).

The peripheral devices 11 to 1n are, for example, control devices such as programmable controllers that control various control objects of the plant, and the CPUI is a host computer that centrally controls these.

In the peripheral device 11 , the CPUI extracts the information from the corresponding address 402 of the memory 3 where the configuration information is stored, and inputs the information to the configuration information input section 30 .

FIG. 2 shows a detailed diagram of the information input section 30.

Peripheral devices set in advance in the address setter 31]1
The address of the memory 3 corresponding to the configuration definition information 402 is compared with the address read from the memory 3 by the CPU 1, and if they match, the CPU I outputs a write signal to the data latch timing unit 33. Upon receiving the write signal, the data latch timing section 33 causes the data at the corresponding address to be written into the register 34. As a result, the configuration definition information of the peripheral device 11 is stored in the register 34.

In FIG. 1, the display section 21 performs display based on the configuration definition information taken into the register 34. For example, when the first peripheral device 11 is under the control of the CPUI, the display 211 of the first display section 21 is turned on (numeral 212 indicates the light emission of the display 212). If the peripheral device is not under control of the CPUI.

That is, when it is disconnected from the CPU and the peripheral device can be replaced (12 inches in FIG. 1), the display of the display section 21 is turned off.

Note that in the above explanation, the configuration definition information data corresponds to each peripheral device on a one-to-one basis; however,
Normally, data handled by computers is 8 bits or 16 bits.
Often bits.

Therefore, it is also possible to hold configuration definition information for 8 or 16 peripheral devices in 8-bit or 16-bit data.

A method for selecting the connection state of each peripheral device with the CPU from 8-bit or 16-bit information in this case will be shown using FIG.

From the input unit 30, for example, the (16-bit)
When the configuration definition information is output to the selector 35, a bit number indicating which part of the 16-bit information the peripheral device corresponds to is set in advance in the peripheral device number setting section 36, and the selector 35 selects the set bit. Extract the data. Next, the display 21 is controlled based on this data.

Next, the operating procedure of this embodiment will be explained using FIG. 4.

In this procedure, in order to remove the peripheral device connected to the CPU, the peripheral device is first changed to the disconnected state and then removed. Now, let us consider a case where the peripheral device 11 shown in FIG. 1 is connected to the CPUI and is to be removed.

When replacing the peripheral device 11, a command is input from an input means (not shown), such as a keyboard, so that the peripheral bag W11 is separated from the control of the CPU (4A).

In response, the CPUI rewrites the data 401 for the peripheral device 11 in the configuration definition information 4 stored in the memory 3 (4B). In the case of this embodiment, the state is changed from 1, which indicates that it is connected to the CPUI and under control, to 0, which indicates that control is disconnected.

Thereafter, the updated configuration definition information 401 is read from the memory 3 by the CPU, output to the bus 2, and transferred to the input unit 30 of the peripheral device 11 (4C). At the same time, control is performed so that control signals and the like are not exchanged between the CPU and the peripheral device 11, and at the same time, the display 21 on the peripheral device 11 is turned off (4D). That is,
The peripheral device 11 can confirm that the peripheral device 11 has been disconnected from the CPUI. The operator confirms that the light is off, removes the first peripheral device 11, and performs replacement work (4E).

Next, a case where a large number of peripheral devices are divided into a plurality of groups and individual peripheral devices are arranged in a concentrated manner in each group will be explained using FIG. In FIG. 5(A), peripheral device groups are shown at 51 and 52, and each group consists of an individual peripheral device 51.
It consists of 1 to 51 m, 521 to 52 m, etc.

The CPUI uses the configuration definition information 4 stored in the memory 3.
is read out and output to bus 2. This configuration definition information is input to common control units 41 and 42 of peripheral devices for each group.

FIG. 4(b) shows details of the common control sections 41 and 42. The configuration of the common control units 41 and 42 is similar to that shown in FIG. 2, but unlike that shown in FIG. 2, registers 34 are installed in accordance with the number of peripheral devices belonging to the group. . The address of the configuration definition information is compared with the preset address, and if they match, the C and PU output a write signal to the data launch timing circuit, and in response, the data corresponding to the corresponding peripheral device address is output. That is, the operation is similar to that shown in FIG. 2 in that the configuration definition information is output to the register 35. The indicators 21 to 2n are turned on and off in accordance with the above data.

FIG. 6 shows an example of configuration definition information in the system shown in FIG. 5(A) and an example of a case where the configuration definition information in the memory 3 is changed. The CPUI stores configuration definition information in memory 3.
The configuration definition information is sequentially read from the beginning and transferred to each peripheral device, but after the configuration definition information is changed, only the changed configuration definition information is transferred to the corresponding peripheral device.

Next, an embodiment will be described with reference to FIG. 7 in which the configuration definition information is not updated after the CPU and the peripheral device are separated until the replacement work of the peripheral device is completed.

The difference between FIG. 7 and FIG. 5 is that a local response switch 61 is added to each group.

When the CPU disconnects control from a certain peripheral device and starts replacement work, the local response switch 61 provided on the peripheral device side is short-circuited. As a result, the ON state of the local response signal is input to the CPU, and the CPU does not start the program for updating the contents of the configuration information until the local response signal becomes the FF state.

When the replacement work is completed, open the local response switch. As a result, the starting/stopping state of the program is released and new configuration definition information is written into the memory by the CPU.

In the above embodiment, a light emitting diode is used as the display 211 to display information by turning it on and off, but it is also possible to display the configuration definition information on a liquid crystal display or the like.

Next, in this embodiment, the configuration information is transferred using a bus, but serial transfer using one communication is also possible.

Furthermore, in this embodiment, the display means indicates to the operator whether or not replacement is possible, but a mechanical locking means is provided between the peripheral device and the main body or casing, and the lock is unlocked when replacement is possible, and when replacement is not possible. If possible, it is also possible to control the insertion and removal status of peripheral devices by locking the door. It is also possible to combine this insertion/removal management with the above-mentioned insertion/removal display.

〔Effect of the invention〕

According to the present invention, in a control system having a CPU and a plurality of peripheral devices, the peripheral device side can grasp the connection state between the peripheral device and the CPU, so even if the peripheral devices are distributed, the connection state can be easily understood. This also has the effect of eliminating erroneous replacement work due to operator error.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a configuration diagram of an information input section, FIG. 3 is a configuration diagram of a peripheral device provided with a data selector section, and FIG. 4 is an operating procedure of the present invention. 5(A) is a configuration diagram when multiple peripheral devices are divided into groups, FIG. 5(B) is a configuration diagram of the common control unit at that time, and FIG. 6 is the configuration of configuration definition information. Figure 7 (A) is a configuration diagram when a local response switch is provided, Figure 7 (B)
The figure is a configuration diagram of the common control section at that time. 1...CPU, 2...Bus, 3...Memory, 4...
...Configuration definition information, 11...Peripheral device, 30...Information input section, 21...Display section. Gloss 1 figure 2 figure? Display section Fig. 3 Fig. 4

Claims (1)

[Claims] 1. In a control system in which a plurality of peripheral devices and a CPU that centrally controls them are connected by a signal line, configuration definition information indicating whether the peripheral device is controlled by an arithmetic processing means or not. in the storage means, and when the peripheral device is hot inserted or removed from the signal line, sends a command to the arithmetic processing means to disconnect the peripheral device from the arithmetic processing means, and modifies the configuration definition information based on the command. and transfer the above configuration definition information to the peripheral device,
A method for displaying hot-line insertion and removal, characterized by displaying whether or not disconnection is possible on the peripheral device based on the configuration definition information. 2. The data of the configuration definition information to be transferred in claim 1 includes the above-mentioned configuration definition information of a plurality of peripheral devices, and the corresponding data is held in advance on the peripheral device side, and the data is checked against the data number. and if they match, the corresponding configuration definition information is fetched and displayed. 3. In a control system in which a plurality of peripheral devices and a CPU that centrally controls them are connected by a signal line, the peripheral device has configuration definition information indicating whether or not the peripheral device is controlled by the arithmetic processing means, and a storage means for inputting a command to rewrite the configuration definition information and storing the configuration definition information in order to disconnect the peripheral device from the arithmetic processing means at the time of hot insertion and removal from the signal line; the arithmetic processing means for transferring the configuration definition information to the peripheral device; the information input means for importing the configuration definition information into the peripheral device; and the display of whether or not the peripheral device can be detached based on the input configuration definition information. A hot-swap display device comprising: display means.