JPS60200354A - Address setting method of controller - Google Patents

Abstract

PURPOSE:To omit the hardware for address setting and an address setting operation and to prevent the mis-setting of an address by subtracting the transmission data from the reception data of the last slave controller, and confirming the number of connected slave controllers. CONSTITUTION:A slave controller 2 receives 01H from a master controller 1 in the form of an information field then recognizes that the own address is equal to 01H. Then, 1 is added to the 01H to produce a new frame check code, and the 02H is transmitted from an own transmission port in the form of an information field together with said newly produced frame check code to reset a bus. Slave controllers 3-7 execute the same operation as the controller 2 and recognize their own addresses. Finally the last master controller 1 receives 07H as an information field. Then it is possible to recognize the number of connected slave controllers.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides hardware for setting the address of each device required when transmitting and receiving data between control devices, or a specific address setting by a control device user. The present invention relates to a control device address setting method that does not require any operating procedure.

Conventional configuration and problems There are two methods for setting the address of a conventional control device: one is by using a switch, and the other is by writing in a specific area in a program memory. However, in the former case, an input circuit is required to read information from the switches into the OPU, and there is a risk that the operator may incorrectly set the switches. Furthermore, in the latter case, in addition to the risk of erroneous settings by the operator as in the former case, there is also the disadvantage that the entire program memory must be re-created once the settings have been changed. .

SUMMARY OF THE INVENTION The present invention addresses the above-mentioned drawbacks and provides an address setting method that does not require hardware for address setting and address setting operations by a control device user.

Structure of the Invention The present invention configures a loop network consisting of a mask control device and a plurality of slave control devices, and the mask control device declares that it is in an address setting mode, then sends out numerical data, and performs slave control. The device adds 1 to the received data and sends the calculation result to the subsequent slave control devices, the slave control devices sequentially recognize the received data as their own addresses, and the mask control device adds 1 to the received data from the last slave control device. The present invention is characterized in that the number of connected slave control devices is recognized by subtracting the transmitted data, and the address setting of the control devices that perform data communication is automatically performed without relying on external input.

DESCRIPTION OF EMBODIMENTS FIG. 1 is a configuration diagram of a loop network according to an embodiment of the present invention for implementing the address setting method for a control device (hereinafter referred to as address setting method), and FIG. 2 is a frame format sent by a master control device. , FIG. 3 is a flowchart for setting the address of the master control device, FIG. 4 is a flowchart for setting the address of the slave control device,
shows.

In the figure, (1) is the master control device, (2) to (7
) is the slave control device, (8) is an address field consisting of 8 bits of information for specifying the slave control device to receive, and (9) is the upper 8 bits that send a command to the slave control device. The lower 8 bits and the subsequent byte 0υ of the information field indicate a frame check field for the slave control device to check for reception errors.

The address revision procedure of the address setting method of the present invention will be explained based on FIGS. 3 and 4.

As shown at 02 in the flowchart of FIG. 3, OOH'' in the address field of the master controller is a broadcast code, and all slave controllers receive subsequent frames.

In a3, the master controller is 'OOH', 'OI
``H'' is sent. 'OOH'' is a command for the master control device to declare that it will set an address. OIH" declares that the following information field is 1 byte long.

As shown in the flowchart of FIG. 4, the slave control devices (2) to (7) in FIG. In order to eliminate transmission delay time, a certain path is immediately disconnected to prevent the subsequent information field data from being passed to the subsequent slave control device.A conceptual diagram of this path is shown in FIG.

In the figure, (to) indicates a slave control device, C3 indicates a path route, (to) indicates a path route disconnection circuit, C11 indicates a receiving data route, and (4I indicates a transmitting data route).

In the ) rJ-chart of the slave control device in Figure 4, D in Q4 indicates whether the information field has been received from the mask control device, and E in (4) indicates whether the frame check field has been received from the master control device. a, c
F of lη indicates whether the frame check code is correct, and 2 of Yl (c) of Xl (goods) of 0 row indicates other processing routines.

After the master control device sends the ry field as shown in θa to aQ in FIG. 3, the slave control device waits for the time required to disconnect the path, and sends "01 It" as the information field.
Next, a frame check field is sent.

A of aD indicates whether the information field has been received from the slave control device, and B of Q mallet indicates whether the frame check field has been received from the slave control device.
C of θ1 indicates whether the frame check code is correct.

The slave control device (2) recognizes that its own address is 'OI H' by receiving "01 II" as the information field as shown in (c) to Oυ of flowchart 1 in Figure 4. .

Next, 1 is added to "0111", a new frame check code is generated, and "02)1" is sent as the information field from the own transmission boat, and the newly generated frame check code is sent out to restore the path.

The slave control devices (3) to (7) also perform the same operation as in (2) to recognize their own addresses.

Finally, the master control device receives '07H' as the information field.

This recognizes the number of connected slave j17t control devices.

Effects of the Invention As with the present invention, there is no need for hardware for address setting such as a switch, there is no need for any operation by the user of the control device, and therefore the risk of incorrect address setting is extremely low. produce an effect.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the loop type network of the present invention, Figure 2
3 is a flowchart for setting the address of the mask control device of the present invention. FIG. 4 is a flowchart for setting the address of the slave control device of the present invention. Flowchy TI,
), and FIG. 5 is a conceptual diagram of an embodiment of a data bus route in the slave control device of this flJ. 1: Mask control device 2-7: Slave control device 8: a
Bit length address field 9: 16 bit length control field l' 10: 17 bit length 25 Gbyte length in7 message field 11: 8 bit length frame check field Received information wild from Anislep control device B: Is the frame check field from the Nislepe control device received? 0: Is the frame check code correct? D:
Has the information field been received from the mask control device? E: Has the frame check field been received from the mask control device? F: Is the frame check code correct? X, Y, Z: Other processing routines 36:
Slave control device 37: Path route 38: Bus route disconnection circuit 39: Reception data route 40: Transmission data route Patent applicant Isao Abe, Patent attorney Matsushita Electric JY Gyo Co., Ltd. Figure 2

Claims (1)

[Claims] A loop network consisting of a mask control device and a plurality of slave control devices is configured, and the mask control device declares that it is in address setting mode, then sends numerical data, and the slave control device sets 1 to the received data. The result of the calculation is sent to the subsequent slave control device, and the slave control device sequentially recognizes the received data as its own address.
By subtracting the transmitted data from the received data from the last slave control device, the mask control device recognizes the number of connected slave control devices and automatically sets the address of the control device that performs data communication without relying on external input. How to set the address of the control device.