JPH02301232A - Transmission controller - Google Patents

Abstract

PURPOSE:To easily obtain a bypass function even with transmission data of an optical system by converting a transmission data of the optical system from an optical signal into an electric signal, inputting the result to an input terminal of the electric system, decoding the transmission data of the optical system to be outputted into the optical signal and sending the signal and ensuring the power supply at a fault of power supply. CONSTITUTION:A transmission data of an optical system received by an optical input terminal 3 is converted once into an electric signal from an optical signal by an optical transmission/reception control section 24 and electric signal is inputted to an input terminal 1 and the transmission data of the optical system outputted from an output terminal 2// is decoded into the optical signal from the electric signal by the optical transmission/reception control section 24 and sent from an optical output terminal 4. Then the power supply for the optical transmission/reception control section 24 is ensured by a power supply control section 29 at a fault of power supply, thereby allowing even the transmission data of the optical system to utilize the same bypass function as that for the transmission data of the electric system. Thus, the transmission controller operating its bypass function even to the transmission data comprising the optical signal is obtained without employing expensive components such as optical switches.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a transmission control device used for transmitting and receiving transmission data between stations in a data transmission system.

[Conventional technology]

FIG. 3 is a block diagram showing a conventional transmission control device. In the figure, 1 is an input terminal to which electric transmission data is input, 2 is an input terminal to which electric transmission data is output, 3 is an optical input terminal to which yarn transmission data is input,
Reference numeral 4 denotes an optical output terminal to which the transmission data of the tip yarn is output. Reference numeral 5 indicates a receiving circuit that receives electrical system transmission data inputted to input terminal 1. Reference numeral 6 receives the transmission data of the tip yarn inputted to optical input terminal 3, and transmits the transmitted data using an optical signal using an electrical signal. It is an optical receiving circuit that converts into data, and 7
is a transmission control circuit that controls the transmission of electrical system and yarn transmission data received by the receiving circuit 5 or the optical receiving circuit 6. 8 is an optical/electrical switching circuit that selects one of the transmission data outputted from the receiving circuit 5 and the optical receiving circuit 6 and inputs it to the transmission control circuit 7; 9 is a switching control signal to the optical/electrical switching circuit 8; This is an optical/electrical switch that provides Reference numeral 10 denotes a transmitting circuit that transmits the electrical transmission data output from the transmission control circuit 7 as an electrical signal from the output terminal 2, and 11 similarly transmits the original transmission data output from the transmission control circuit 7 electrically. This is an optical transmission circuit that converts a signal into an optical signal and transmits it from the optical output terminal 4. Reference numeral 12 denotes a bypass means for directly bypassing the electrical system transmission data inputted to the input terminal 1 to the output terminal 2 without passing through the receiving circuit 5, the transmitting circuit 1O, etc., and 13 is a main unit (not shown). This is a power supply terminal that receives power supplied from the power supply. 14 and 15 are switched to the "a" side when the station equipped with the transmission control device is operating normally, connecting input terminal 1 to receiving circuit 5 and output terminal 2 to transmitting circuit 10. CP connected and not shown
When a station equipped with the transmission control device cannot operate normally due to runaway of U, abnormality in power supply from the main power source, etc., the station is switched to the U BN side, and the input terminal 1 and output terminal 2 are connected. Each of them is a relay contact as a switching means connected to the bypass means 12. Further, FIG. 2 is a block diagram showing an example of a data transmission system using such a transmission control device. In the figure, 16 is a primary station that takes the initiative of the data transmission system, and 17+ to 177 are secondary stations connected to the secondary station 16 in a loop through a transmission line 18. 19 is a CPU (central processing unit) installed in the primary station 16; 20 is a CPU (central processing unit) installed in the primary station 16 and the secondary station 171;
The transmission control device 21 is installed in each of the primary station 16 and each secondary station 17 . This is an input/output interface circuit that is installed in the ~177 and processes signals input and output to each station. Next, the operation will be explained. Primary station 1 shown in Figure 2
6, data collection by the input/output interface circuit 21 under the control of the equipped host CPU 9;
Processing etc. are being carried out. In addition, the required secondary stations 171 to 1
77, and the secondary station 17. ~17
In order to receive transmission data from 7, etc., the transmission control device 2
Data is also exchanged via a shared RAM (random access memory), which is not shown in the figure. On the other hand, each secondary station 17. ~17n, the equipped transmission control device 20 and input/output interface circuit 21 collect and process various data required by the secondary station 16, and send the transmitted data to the primary station 16 via the transmission line 18. Transmission is in progress. Furthermore, upon receiving transmission data from the -next station 16, necessary output processing is executed via the input/output interface circuit 21. The transmission line 18 loop-connecting the stations 16.171 to 17.1 in FIG. 2 can be used as either an original cable or an electrical cable depending on the purpose. Next, the operation of the transmission control device shown in FIG. 3 will be explained. Here, the secondary station 17I equipped with the transmission control device
177 are operating normally, relay contacts 14 and 15 as switching means are both switched to the "a" side. Therefore, the transmission data of the electrical system input to the input terminal 1 is transmitted to the receiving circuit 5 via the relay contact 14.
Received at. On the other hand, original transmission data input manually to the optical input terminal 3 is received by the optical receiving circuit 6 and converted from an optical signal to an electrical signal. The electrical transmission data output from the receiving circuit 5 and the original transmission data output from the optical receiving circuit 6 are input to the optical/electrical switching circuit 8,
The electric switching circuit 8 selects one of the input transmission data according to the setting of the optical/electrical changeover switch 9. The transmission data selected in this way is sent to the transmission circuit 10 and the optical transmission circuit 11 via the transmission control circuit 7. In the transmitting circuit 10, electrical transmission data is transmitted as an electrical signal from the output terminal 2 via the relay contact 15 which is switched to the "a" side. In addition, the optical transmitter circuit 1
1 converts the transmission data of the tip yarn from an electrical signal to an optical signal and transmits it from the optical output terminal 4. Here, due to the CPU running out of control or an abnormality in the main power supply, normal power is not supplied to the power terminal 13, and the secondary stations 17, ~17fi equipped with the transmission control device cannot operate normally. Then, the relay contacts 14 and 15 as switching means are respectively switched to the "b" side. By switching the relay contacts 14 and 15, the electrical transmission data input to the input terminal 1 is transferred via the bypass means 12. Therefore, even if a failure occurs in any of the loop-connected secondary stations 17. to 17.l, the electrical transmission data will be transferred as is to the next station. Therefore, secondary station 171-17.
failure will not spread to the entire data transmission system.

[Problem to be solved by the invention]

Since the conventional transmission control device is configured as described above, the secondary station 17. ~ 1711 cannot operate normally, the bypass function works for electrical system transmission data, but the bypass function does not work for the data transmitted by the first thread, and the first thread is used as the transmission line 18. In a data transmission system that uses cables, the entire system will go down, and in order to provide the same bypass function for the data transmitted by the first thread as that transmitted by the electrical system, expensive optical switches and their control equipment are required. , the device configuration becomes complicated and the device price increases. This invention was made to solve the above-mentioned problems, and is a transmission control system that has a bypass function even for data transmitted by optical signals without using expensive elements such as optical switches and their control devices. The purpose is to obtain equipment.

[Means to solve the problem]

The transmission control device according to the present invention converts an optical signal input to an optical input terminal into an electrical signal and sends it to the input terminal, and also converts an electrical signal received from an output terminal into an optical signal and outputs the signal from an optical output terminal. An optical transmission/reception control section that outputs an output, and a power supply control section that supplies power to the optical transmission/reception control section when an abnormality in the power supply is detected, and a switching means allows the input terminal to be received during normal operation. The output terminal is connected to a circuit and the output terminal is connected to a transmitting circuit, and when the device cannot operate normally, the input terminal and output terminal are respectively connected to bypass means.

[Effect]

In the transmission control device of the present invention, the transmission data of the tip yarn received at the optical input terminal is converted from an optical signal into an electrical signal by the optical transmission/reception control section, and the signal is inputted to the input terminal, and is outputted from the output terminal. The optical transmission/reception control unit converts the transmission data of the tip thread from an electrical signal to an optical signal and sends it out from the optical output terminal, and in the event of a power supply failure, the power supply control unit ensures power supply to the optical transmission/reception control unit. To make it possible to use the same bypass function as electrical system transmission data even for yarn transmission data.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 1 is an input terminal, 2 is an output terminal, 3 is an optical input terminal, 4 is an optical output terminal, 5 is a receiving circuit, 6 is an optical receiving circuit, 7 is a transmission control circuit, 10 is a transmitting circuit, and 11 is an optical The transmitting circuit, 12 is a bypass means, 13 is a power supply terminal, 14 and 15 are relay contacts as switching means, and since these are the same or equivalent parts of the conventional ones with the same reference numerals in FIG. 3, a detailed explanation will be provided. is omitted. Further, 22 is a transmission driver that inputs the transmission data of the first yarn converted into an electric signal by the optical receiving circuit 6 to the input terminal 1, and 23 is the transmission driver that inputs the transmission data of the first yarn outputted from the output terminal 2 to the optical transmitter. A transmission receiver is manually operated in the circuit 11, and 24 is an optical transmission/reception control section formed by the optical reception circuit 6, the transmission driver 22, the transmission receiver 23, the optical transmission circuit 11, and the like. Furthermore, 25 is a power supply abnormality detection circuit that detects that normal power supply is no longer being provided to the power supply terminal 13 due to an abnormality in the main power supply, etc.; This is a switching control circuit that generates control signals. 27 is a transistor switch that is opened and closed by a control signal from the switching control circuit 26, and 28 is a backup power source that supplies power to the optical transmission/reception control unit 24 instead of the main power source when the transistor switch 27 is off. It is a battery. Reference numeral 29 denotes a power supply control section formed by the power supply abnormality detection circuit 25, the switching control circuit 26, the transistor switch 27, the battery 28, and the like. Next, the operation will be explained. Here, since the transmission data of the electrical system is the same as in the conventional case, the transmission data of the first thread will be explained. Further, when the secondary stations 171 to 177 equipped with the transmission control device are operating normally as in the conventional case, the relay contacts 14 and 15 as switching means are both switched to the "a" side. ing. The transmission data of the tip yarn inputted to the optical input terminal 3 is received by the optical reception circuit 6 of the optical transmission/reception control section 24, converted from an optical signal to an electrical signal, and sent to the input terminal 1 via the transmission driver 22. It will be done. This transmission data is sent from input terminal 1 to “a”.
The data is input to the receiving circuit 5 via the relay contact 14 which is switched to the "a" side.The transmission data output from the receiving circuit 5 is sent to the transmitting circuit 10 via the transmission control circuit 7, Relay contact 15 switched to side
The signal is returned to the optical transmission/reception control section 24 from the output terminal 2 via the . In the optical transmission/reception control unit 24, the transmission data is received by the transmission receiver 23, and the optical transmission circuit 11 converts the electrical signal into an optical signal and transmits it from the optical output terminal 4. Here, if the transmission control device 17I to 17 equipped with the transmission control device cannot operate normally, the relay contacts 14 and 15 are respectively switched to the b'' side. The transmission data of the tip yarn converted into a signal is sent to the input terminal 1 and relay contact 14,
The signal is transmitted to the output terminal 2 via the bypass means 12 and the relay contact 15, and is returned from the output terminal 2 to the optical transmission/reception control section 24. The optical transmission/reception control section 24 converts the returned transmission data of the first yarn from an electrical signal to an optical signal and sends it out from the optical output terminal 4. Therefore, the loop-connected secondary station 17. ~
17. ．． Even if a failure occurs in any of the secondary stations 17. ~17. 1 is disconnected from the transmission line 18, and the transmission data of the first thread is transferred as it is to the next station, and the transmission line 1
Even in a data transmission system using a cable with a lead wire at 17.8, the secondary station 17. The failures in items 1 to 17 do not spread to the entire system. At this time, if normal power is not supplied to the power terminal 13 due to an abnormality in the main power supply, the power supply control unit 29
Then, the power supply abnormality detection circuit 25 detects the abnormality in the power supply and operates, and the switching control circuit 26 sends a control signal to the transistor switch 27 based on the detection output of the power supply abnormality detection circuit 25. transistor switch 2
7 is turned off by this control signal to disconnect the power supply terminal 13, and the battery 28 starts supplying power to the optical transmission/reception control unit 24' from which the power supply terminal 13 has been disconnected. Thereby, even if an abnormality occurs in the power supply, the power supply to the optical transmission/reception control section 24 is ensured. In addition, if the relay contacts 14 and 15 are set to switch to the "bn" side when the relay is not energized, the transmission data input to the input terminal 1 can be passed through the bypass means I2 even in the event of an abnormality in the power supply. It is reliably transmitted to the output terminal 2. Here, the connection between the optical transmission/reception control unit 24 and the input terminal 1 or the output terminal 2 is made using a connector as shown by the broken line in FIG. If the transmission path 18 is configured with only electrical cables, remove the connector and connect the electrical cables between the input terminal 1 and output terminal of the transmission control device 20 of each station 16.17° to 177. Furthermore, it is possible to easily separate the electrical system control circuit section, the optical transmission/reception control section 24, and the power supply control section 29. In the above embodiment, a battery is used as a backup power source. However, instead, a small capacity DC-DC power supply module is installed (e.g. DC24V/D
C5V) A 24V battery power source may be supplied from outside as a power source exclusively for the optical transmission/reception control section, separately from the AC 100V power source. In addition, as mentioned above, since the electrical system control circuit section, optical transmission/reception control section, and power supply control section can be easily separated, both the electrical system and the threading elements are always mounted on the transmission control device. If you adopt a method of combining the optical transmission/reception control section and the power supply control section as separate boards, you can create a board that meets the system requirements (electrical only, yarn only, or a combination of electricity and optical). There are also advantages in that the configuration can be easily selected and the system can be constructed flexibly. Further, in the above embodiment, the transmission control device is provided with a backup power supply for the limited circuit, but it may be applied to other boards, and the same effects as in the above embodiment can be obtained.

【Effect of the invention】

As described above, according to the present invention, the optical transmission/reception control section converts the transmission data of the tip thread received from the optical input terminal from an optical signal to an electrical signal, inputs it to the input terminal, and outputs it from the output terminal. The transmission data of the tip thread is converted back from an electrical signal to an optical signal and sent out from the optical output terminal, and in the event of an abnormality in the power supply, the power supply control section secures the power supply to the optical transmission/reception control section, so the optical switch and its It becomes possible to easily implement a bypass function for data transmitted by optical signals without using expensive elements such as a control device, and there is an effect that a highly reliable data transmission system can be constructed at low cost.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a transmission control device according to an embodiment of the present invention, Fig. 2 is a block diagram showing an example of a data transmission system in which the transmission control device is used, and Fig. 3 shows a conventional transmission control device. It is a block diagram. 1 is an input terminal, 2 is an output terminal, 3 is an optical input terminal, 4 is an optical output terminal, 5 is a receiving circuit, 7 is a transmission control circuit, IO is a transmitting circuit, 12 is a bypass means, 14゜15 is a switching means (
20 is a transmission control device, 24 is an optical transmission/reception control section, and 29 is a power supply control section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] a receiving circuit that receives transmission data based on an electrical signal input to an input terminal and sends it to a transmission control circuit; a transmitting circuit that sends transmission data based on an electrical signal output from the transmission control circuit from an output terminal; bypass means for bypassing transmission data based on an input electrical signal to the output terminal; and a bypass means for connecting the input terminal to the receiving circuit and connecting the output terminal to the transmitting circuit when normal, and connecting the input terminal and the output terminal when abnormal. a switching means for connecting each of the terminals to the bypass means, and a switching means for converting transmission data by an optical signal inputted to the optical input terminal into transmission data by an electric signal and sending it to the input terminal, an optical transmission/reception control unit that converts signal transmission data into optical signal transmission data and transmits it from an optical output terminal, and supplies power to the optical transmission/reception control unit in place of the main power supply when an abnormality in the power supply is detected. A transmission control device comprising a power supply control section that performs the following operations.