JPH11288396A - Slave device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily confirm the address of a slave device and to easily confirm the number of channels occupied by the slave device. SOLUTION: This slave device is provided with an address/channel number display part 8 for displaying a node address set by dip switches 61 -62 and also provided with a changeover switch 9 for display changeover. By the operation of the changeover switch 9, the occupied channel number of the slave device is switched and displayed at the address/channel number display part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slave device connected to a master device together with a network such as a device net.

[0002]

2. Description of the Related Art As a control system using a network conforming to a device network, for example, as shown in FIG. 5, a master device 1 composed of a programmable controller and a plurality of slave devices 2 composed of input / output terminals and the like are shown in FIG. _'1, 2' _2, 2 _'3 ... and with connecting, the slave devices 2' _1, 2 _'2, 2' ₃ ..., the air valve and the actuator and the output devices (not shown) or the limit switch And input devices (not shown) such as various sensors and the like, and outputs an on / off control signal transmitted from the master device 1 to an output device via the slave devices 2 ′ ₁ , 2 ′ ₂ , 2 ′ ₃ . , Or an on / off state signal from an input device is taken into the slave devices 2 ′ ₁ , 2 ′ ₂ , 2 ′ _3, ... And transmitted to the master device 1.

[0006] In the memory of the master device 1 in such a control system, for example, as shown in FIG.
OUT area 1 for writing output data to slave device
For example, a channel and a node address are assigned to each of the IN and OUT areas 17 and 18 for every 16 bits.

[0004] In the initial setting of the system, each slave device 2 _'1, 2' _2, 2 _'3 ... every time it is connected to the network, by setting the node address, respectively, the corresponding memory of the master device 1 Each area is allocated to each of the slave devices 2 ′ ₁ , 2 ′ ₂ , 2 ′ ₃ ... To which the node address is set, and thus each of the slave devices 2 ′ ₁ , 2 ′ ₂ , 2 ′ ₃ ... the allocated using the respective areas of the memory master device 1 each master device 1 and the slave devices 2 _'1, 2' _2, 2 _'3 ... as data is transferred between the Has become. The allocation of the memory area will be described in more detail.

[0005] The type of the slave device is, for example, an input terminal for inputting 8 points (8 bits), an output terminal for outputting 16 points (16 bits), and 32 points (32 bits).
The number of occupied channels is determined depending on the type, such as an input terminal for input and a terminal for analog input of 64-bit input. For example, in an input terminal for 8 points (8 bits) input, the lower 8 bits of the IN area are set. In this case, the upper 8 bits cannot be used for other purposes. Therefore, 16 bits (in other words, one channel of the IN area) are occupied. Occupy, 32
A point (32-bit) input terminal occupies two channels of the IN area, and a 64-bit input analog input terminal occupies four channels of the IN area.

Therefore, at the time of initial setting of the system, a node address is set by a dip switch of each slave device so that the occupied channels do not overlap.

For example, assume that the node address of an input terminal of 8 points (8 bits) is "00", the node address of an output terminal of 16 points (16 bits) is "01", and 32 points ( The node address of the input terminal for "32-bit) input is" 02 ". Since this input terminal occupies two channels, it is 64 bits.
The bit input analog input terminal sets the node addresses in order so that the occupied channels do not overlap, such as setting the node address to "04".

[0008]

In such a control system, when a network error occurs, for example, when a communication error occurs with a slave device, the node address where the error has occurred is indicated by the master device. However, in order to check which slave device the displayed node address is, it is necessary to make a judgment by looking at the DIP switch settings of each slave device. In addition, when a large number of slave devices are connected, there is a problem that it is not easy to find a slave device in which an abnormality has occurred.

Further, when a new slave device is added to the network, it is necessary to set a node address so that channels do not overlap as described above. However, if it is not known how many channels of the memory are occupied, the node address cannot be set so that the channels do not overlap. For this reason, conventionally, the number of occupied channels is checked according to the specifications of the slave device. And add a slave device, which is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and makes it possible to easily confirm the address of a slave device, and further to easily confirm the number of channels occupied by the slave device. The purpose is to be.

[0011]

In order to achieve the above-mentioned object, the present invention is configured as follows.

That is, a slave device according to the present invention is a slave device connected to a network together with a master device having a node address allocated to each area of a memory, and sets the node address of the slave device. And an address display unit for displaying the set node address.

According to a second aspect of the present invention, in the configuration of the first aspect, each area of the memory is assigned a channel corresponding to a node address, and displays the number of channels occupied by the slave device. have.

According to a third aspect of the present invention, in the configuration of the second aspect, the address display section and the channel number display section are shared by the same display section, and an operation is performed to switch between the address display and the channel number display. Operation unit.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, at least one of an input device and an output device is connected, and input data from the input device is taken in. It transmits to the master device, receives output data from the master device, and outputs it to the output device.

According to the first aspect of the present invention, since the slave device has the address display unit for displaying the set node address, the node address of the slave device can be easily determined by looking at the address display unit. As a result, for example, when the node address where the abnormality has occurred is displayed on the master device, it is possible to efficiently search for the slave device where the abnormality has occurred.

According to the second aspect of the present invention, since the slave device has a channel number display unit for displaying the number of channels in the memory of the master device occupied by the slave device, the slave device can be viewed by looking at the channel number display unit. Since the number of channels occupied by the device can be grasped, for example, when a new slave device is added to the network, the number of occupied channels of the last slave device already connected can be easily grasped. The node address of a new slave device can be set so that channels do not overlap.

According to the third aspect of the present invention, since the address and the number of channels are switched and displayed on the same display unit, it is possible to save space as compared with the case of displaying individually.

According to the present invention, at least one of an input device such as a sensor or a switch and an output device such as an actuator or an air valve is connected.
Since input data from the input device is fetched and transmitted to the master device, and output data from the master device is received and output to the output device, the present invention can be suitably applied to a control system of various manufacturing lines.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall configuration diagram of a control system provided with a slave device according to the present invention. In FIG. 1, each slave device has a display state of an address / channel number display section described later. Is shown.

This control system is constituted by a network (for example, CompoBus / D) conforming to a device net, and includes a master device 1 composed of a programmable controller and a master device 1 connected to the master device 1 via a communication cable via a communication cable. A plurality of slave devices 2 ₁ , 2 ₂ , 2 according to the invention
₃ ... and a slave device 2 _{1, 2} 2, 2 ₃ ..., the
For example, it comprises input / output terminals to which input devices (not shown) such as proximity sensors and limit switches (not shown) are connected, or output devices (not shown) such as relays and actuators are connected.

This control system, like the conventional example, transmits on / off input data from an input device to each slave device 2.
_1, 2 _2, 2 ₃ ... transmitted to the master apparatus 1 via the master device 1, arithmetic processing in accordance with a preset program captures the input data, the slave device outputs data on-off 2 ₁ , 2 ₂ , 2 ₃ ... To output equipment to control machine tools and the like.

As shown in FIG. 6, for example, as shown in FIG.
_{1, 2 2, 2 3} IN area 17 ... input from is informed
, And an OUT area 18 for writing output data to the slave devices 2 ₁ , 2 ₂ , 2 ₃ ... In each of the IN and OUT areas 17, 18, for example, a channel and node address are provided every 16 bits Assigned.

At the time of initial setting of the system, by setting a node address for each of the slave devices 2 ₁ , 2 ₂ , 2 ₃ ... Connected to the network, the corresponding area of the memory of the master device 1 is set. Are assigned to the respective slave devices 2 ₁ , 2 ₂ , 2 _3, ... To which the node addresses are set, and thus the master device 1 allocated to each slave device 2 ₁ , 2 ₂ , 2 ₃ ,.
Data is exchanged between the master device 1 and each of the slave devices 2 ₁ , 2 ₂ , 2 ₃ ,. FIG. 2 shows the slave devices 2 ₁ , 2 ₂ , 2 _{3 of} this embodiment.
FIG. 2 is a schematic front view showing an example of the slave device. The slave device includes an I / O terminal unit 3 composed of a terminal block (not shown) to which input / output devices are connected, and a power supply composed of a terminal block (not shown) to which an internal power supply is connected. and use the terminal unit 4, a communication connector portion 5 to which a communication cable is connected, a node address of the slave device, and ten dIP switches ₆₁ through ₁₀ for setting a communication speed, failure or communication failure such as It has a status display unit 7 for displaying the status of the slave and the network, and the above configuration is basically the same as that of the conventional slave device.

[0026] In this embodiment, in order to be able to easily grasp the node address set without looking six settings of DIP switches ₆₁ through ₆ as an address setting unit, the node address And an address for switching and displaying the number of occupied channels of the slave as described later.
It has a channel number display section 8 and a changeover switch 9 as an operation section for switching the display of the address / channel number display section 8. The address / channel number display section 8 has a 2-digit 7-segment LED. It is composed of

[0027] That is, the slave device of this embodiment, when displaying the initial setting of the system, the node address is set by six DIP switches ₆₁ through 65 _6, the 2-digit address / channel number display unit 8 To do
As shown in the table below, for example, "00" to the six Setting "000000" DIP switch ₆₁ through _6, the node address "00" is set the address / channel number display unit 8 will be displayed, by setting the "100000" dIP switch ₆₁ through _6, is set to the node address "01" in the address / channel number display unit 8 will be "01" is displayed, If you set the "010000" in the dip switch 6 _{1-6 6,}
Will be the node address "02" is displayed, "02" is set in the address / channel number display portion 8, hereinafter, the same way DIP switch ₆₁ through ₆ in "1111
When "11" is set, the node address "63" is set and "63" is displayed on the address / channel number display section 8.

[0028]

【table】

In FIG. 1, the slave device 2 ₁
, The node address "00", the slave device 2 _2, the node address "02", the slave device 2 _3,
The node address “03” is set, and the address / channel number display section 8 of each slave device 2 ₁ , 2 ₂ , 2 ₃ is set.
, The set node addresses are respectively lit and displayed.

The node addresses of the slave devices 2 ₁ , 2 ₂ , 2 ₃ ... Are set so that the occupied channels do not overlap, as in the conventional example.

As described above, the type of the slave device is, for example, an input terminal for inputting 8 points (8 bits), an output terminal for 16 points (16 bits) output, and 3 terminals.
The number of channels to be occupied is determined depending on the type, such as a terminal for inputting two points (32 bits) and a terminal for analog input having 64 bits. In this embodiment, the changeover switch 9 for changing the display is operated. , The number of occupied channels of the slave devices 2 ₁ , 2 ₂ , 2 _3, ... Is switched and displayed on the address / channel number display section 8 as shown in FIG. In the case of the display, the display is made to blink. The information on the number of occupied channels is
Are stored for each of the slave devices 2 ₁ , 2 ₂ , 2 _3, ... As described later.

[0032] In FIG. 3, the slave device 2 _1, the number of occupied channels is 2-channel, the slave device 2 _2,
The number of occupied channels is one, and the slave device 2 ₃
Shows an example in which the number of occupied channels is four, and the number of occupied channels is blinking on the address / channel number display section 8 of each of the slave devices 2 ₁ , 2 ₂ , and 2 ₃ . By operating the display changeover switch 9 again, the node address is changed as shown in FIG.
Is displayed as shown in FIG.

FIG. 4 shows this slave device 2 ₁ , 2 ₂ , 2 ₃
It is a block diagram which shows the internal structure of an example.

The slave device is provided with the above-described communication connector unit 5 corresponding to the device net, a communication circuit 10 including a transmission / reception circuit, etc., and receives input data from an input device and outputs data to an output device. And an operation means 12 including the above-mentioned DIP switch 6 for setting communication speed, node address, etc., and the above-mentioned changeover switch 9 for switching display.
An address / channel number display section 8 for switching and displaying a node address or the number of occupied channels; a CPU 13 for controlling each section such as communication control and display control; a ROM 14 storing a control program; And a EEPROM 16 in which the number of occupied channels of the slave device is stored.

In the control system having the above-described configuration, the address / channel number display section 8 of each of the slave devices 2 ₁ , 2 ₂ , 2 ₃ ... .. Are always lit, and the node addresses of the slave devices 2 ₁ , 2 ₂ , 2 ₃ ... Can be easily confirmed.

The master device 1 composed of a programmable controller has a display unit for displaying a communication error or a failure. When a communication error with the slave devices 2 ₁ , 2 ₂ , 2 ₃ . As in the case of the device, the node address in which an error has occurred is displayed.

The slave devices 2 ₁ , 2 ₂ ,
In 2 ₃ ..., The node address is always lit on the address / channel number display section 8. Therefore, if an error occurs and the node address in which an error occurs in the master device 1 is displayed, each slave address is displayed. By checking the node address of the address / channel number display section 8 of the devices 2 ₁ , 2 ₂ , 2 _3, ..., It is possible to easily search for a slave device in which an abnormality has occurred. There is no need to check the node address from the DIP switch settings.

The slave devices 2 ₁ , 2 ₂ , 2 ₃ ... Of this embodiment operate the changeover switch 9 so that the number of occupied channels of the slave devices 2 ₁ , 2 ₂ , 2 ₃ . As shown in FIG. 3, since the address / channel number display section 8 blinks, when adding a new slave device to the network, the largest node address among the already connected slave devices is displayed. By operating the changeover switch of the slave device to display the number of occupied channels of the slave device, the node address to be set for the slave device to be added can be easily known without overlapping the channels.

As described above, the slave devices 2 ₁ , 2 ₂ , 2 ₃ .
Since the node address and the number of occupied channels can be easily grasped, it is possible to efficiently perform replacement, addition, or maintenance of the slave device.

The switching display of the address / channel number display section 8 may be performed by a command from the master device 1.

In the above embodiment, the display of the node address and the display of the number of occupied channels are shared by the single display unit 8. However, as another embodiment of the present invention, the display of the individual display units is performed. Of course, it may be possible.

Although the node address is always displayed in the above-described embodiment, a display start switch or the like may be provided to display the node address only when necessary.

Note that only one or both of the input device and the output device may be connected to the slave device.

[0044]

As described above, according to the present invention, since the address display section for displaying the set node address is provided, the node address of the slave device can be easily grasped by looking at the address display section. That is, for example, when the node address in which an error has occurred is displayed on the master device, the slave device in which the error has occurred can be efficiently searched for, and maintenance can be performed quickly.

Further, according to the present invention, the slave device has a channel number display section for displaying the number of channels of the memory of the master device occupied by the slave device. The number of occupied channels can be grasped.For example, when a new slave device is added to the network, the number of occupied channels of the last slave device already connected can be easily grasped. The node address of the new slave device can be set so as not to overlap, and the slave device can be efficiently added.

Further, according to the present invention, the address and the number of channels are switched and displayed on the same display unit, so that space can be saved as compared with the case of displaying individually.

According to the present invention, at least one of an input device such as a sensor and a switch and an output device such as an actuator and an air valve are connected, and input data from the input device is taken and transmitted to a master device. In addition, since the output data from the master device is received and output to the output device, it can be suitably applied to a control system of various manufacturing lines.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a system including a slave device according to one embodiment of the present invention.

FIG. 2 is a front view of an example of the slave device of FIG. 1;

FIG. 3 is a diagram corresponding to FIG. 1 in a state where the number of occupied channels is displayed.

FIG. 4 is a block diagram illustrating an internal configuration of an example of the slave device of FIG. 1;

FIG. 5 is a configuration diagram of a conventional system.

FIG. 6 is a diagram for explaining memory allocation of a master device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Master device 2 ₁ , 2 ₂ , 2 ₃ Slave device 6 _{1 to} 6 ₁₀ Dip switch 8 Address / channel number display section 9 Changeover switch 13 CPU

Claims (4)

[Claims] 1. A slave device connected to a network together with a master device having a node address allocated to each area of a memory, an address setting unit for setting the node address of the slave device, and a set node address. And an address display unit for displaying the following. 2. The slave device according to claim 1, wherein a channel corresponding to a node address is allocated to each area of the memory, and the memory has a channel number display section for displaying the number of channels occupied by the slave device. 3. The slave device according to claim 2, wherein the address display section and the channel number display section are shared by the same display section, and an operation section operated to switch between the address display and the channel number display is provided. . 4. An apparatus, wherein at least one of an input device and an output device is connected, receives input data from the input device, transmits the input data to the master device, receives output data from the master device, and 4. The slave device according to claim 1, wherein the slave device outputs the signal to an output device.