JP3483339B2 - Set value information transmission device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transmitting setting value information in an apparatus for transmitting data such as a process amount. 2. Description of the Related Art Conventionally, as a data transmission method, a slave station transmits process data such as temperature collected by a slave station to a master station via a transmission line in response to a polling signal from the master station, and captures the data by the master station. There is a polling method in which data is processed and transmitted to another slave station again by a polling signal. However, the polling method always requires a master station and also requires a polling signal, so that the apparatus is complicated, requires a long response time, and has an insufficient communication speed. [0004] In some cases, the device is replaced for maintenance, and in order to improve reliability, duplication is attempted.
In this case, another equivalent device must be connected to the transmission line. At this time, it is necessary to store the set values in a newly connected device. However, it is troublesome to manually set a large number of parameters, and erroneous settings and the like are required. There was a fear. SUMMARY OF THE INVENTION An object of the present invention is to provide a setting value information transmitting apparatus capable of obtaining setting value information with a simple configuration in view of the above points. According to the present invention, a first device and a second device having the same device number are provided, and the second device is provided with a set value request having the device number. The first device outputs the code to the bus, the first device receives the set value request code with the same device number as the device itself, outputs the set value information owned by the first device to the bus, and causes the second device to receive the set value request code. A setting value information transmission device configured as described above. FIG. 1 is a structural explanatory view showing an embodiment of the present invention. In FIG. 1, for example, a plurality of input devices 1,..., A plurality of output devices 2,.
Etc. are connected. The output device 2,..., The arithmetic devices 3, 4,. Each of these devices is assigned a device number unique to the device, and data and the like can be transmitted using this device number. The analog signal data such as temperature input to the input device 1 is subjected to necessary processing such as linearization, and then output to the bus L with a unique device number of the input device 1. . The necessary data among the data flowing on the bus L is output to the output device 2, the arithmetic device 3,
4 will be captured. Therefore, depending on which input device or arithmetic device, etc., data is required for these capture devices, the device number of the output data of the input device, arithmetic device, etc. required by the capture device is used as the capture number. Set in advance. For example, assuming that the data of the input device 1 is taken in by the output device 2 and the arithmetic device 3, the output device 2 and the arithmetic device 3 set the same number as the device number of the input device 1 as a take number. deep. The output device 2 discriminates and selects only data having the device number of the input device 1 corresponding to the fetch number among the data flowing through the bus L, fetches the data, and outputs it to the outside after predetermined processing. . The arithmetic unit 3 selects, discriminates, and takes in only the data with the device number of the input device 1 that matches the take-in number among the data flowing through the bus L. Then, after performing necessary calculations such as averaging, the data is given a unique device number of the arithmetic unit 3 and output to the bus L. Then, it is assumed that an arithmetic unit 4 having the same device number as the arithmetic unit 3 is connected for replacement for maintenance of the arithmetic unit 3 or for duplication. In this case, the arithmetic unit 4 adds the same device number “03” to the set number request code “S” as the unit number of the arithmetic unit 3 and outputs the following message output to the bus L. At S 03, the arithmetic unit 3 has the same device number “0” as its own.
The set value request code "S" with "3" is received, it is determined that the set value request has been made by itself, and the set value information owned by itself is calculated via the bus L with the response code "R". Transmit to the device 4. Assuming that the set value information is a plurality of sets of PID constants, for example, it is as follows. R 03 P = A 1 I = B 1 D = C 1 The arithmetic unit 4 receives this, judges it as its own set value from the unit number “03”, takes in and stores it. A
1, B1, and C1 are predetermined values stored in advance. The set value information may be a plurality of sets, or may be various other types. As a result, the arithmetic units 3 and 4
In both cases, the same set value can be used, maintenance can be performed while the bus L is in operation, and operation can be immediately continued with a new device.
Zero time recovery becomes possible. Next, FIG. 2 shows a somewhat more detailed configuration explanatory view. The first arithmetic unit 3 receives the acquisition number setting device 3 from the bus L.
The necessary data designated by f is taken in by the transmission means 3a,
Based on set values such as PID parameters input through the operating means 3e or the bus L and stored in the memory 3d,
The arithmetic processing is performed by the processing means 3c, the device number unique to the arithmetic device 3 is assigned by the device number setting device 3b, and the result is output to the bus L. Then, the second arithmetic unit 4 having the same unit number as that of the first arithmetic unit 3 for replacement or duplication for maintenance of the arithmetic unit 3 and for which a set value has not been inserted is connected. Suppose you did. In this case, the number of the device number setting device 4b of the second arithmetic device 4 is made the same as that of the first arithmetic device 3. Then, the set value request code and its device number are output to the bus L by the operation means 4e or the like. Then, the arithmetic unit 3 receives the set value request code having the same device number as itself, determines that the set value request has been made by itself, attaches a response code, and attaches a response code to the memory 3d.
Is transmitted to the bus L. The arithmetic unit 4 receives this via the transmission unit 4a, judges it as its own set value from the device number of the device number setting unit 4b, takes it in, and stores it in the memory 4d by the processing unit 4c. As a result, the content of the same set value can be set in both the arithmetic units 3 and 4, and since the device numbers are the same, the acquisition number setting unit of the second arithmetic unit 4 is further improved. Since the number 4f is the same as that of the first arithmetic unit 3, the operation can be continued in the parallel operation or the second arithmetic unit 4. In other words, maintenance can be performed even during operation, and operation can be immediately continued with a new device, that is, hot-line maintenance and zero-time recovery can be performed. In the above, the arithmetic unit 3 and the arithmetic unit 4 have been described as examples of the first device and the second device having the same device number, but the type is not limited to this.
Any of input devices, output devices, and other devices connected to the bus L may be used. As described above, according to the present invention, according to the present invention, the second device outputs the set value request code with the device number of the first device to the bus, and the first device outputs This is a setting value information transmitting apparatus which receives a setting value request code having the same device number as the self, outputs the setting value information held by the self to a bus, and causes the second device to receive the setting value information. For this reason, the main master station is unnecessary, and the communication speed can be made sufficiently high. From the configuration of at least two devices and a bus, as long as the number permits,
A combination of dozens or hundreds of data and devices can be easily, arbitrarily, and flexibly configured, and can be easily and sufficiently applied to various systems, and is flexible, scalable, effective, and efficient. Can be handled.
In addition, other devices equivalent for replacement for maintenance of the device or for redundancy to improve reliability are connected without any disturbance and even during operation, and set values are the same. Yes, it is not necessary to manually set each time, or to search for setting values from a host computer or the like and set them for a new device.The setting values of the existing device can be automatically transmitted to the new device automatically. , And accurate setting values can be stored. In other words, maintenance can be performed even during operation, and operation can be immediately continued with a new device, that is, hot-line maintenance and zero-time recovery can be performed.

[Brief description of the drawings] FIG. 1 is a configuration explanatory view showing one embodiment of the present invention. FIG. 2 is a configuration explanatory view showing one embodiment of the present invention. [Explanation of symbols] 1 Input device 2 Output device 3, 4 arithmetic unit L bus

Claims (1)

(57) [Claims] [Claim 1] A first device and a second device having the same device number.
The second device outputs the set value request code with the device number to the bus, and the first device receives the set value request code with the same device number as its own. A setting value information transmitting device for outputting the setting value information owned by itself to a bus and causing the second device to receive the setting value information;