JPS60130238A - Signal transmitter - Google Patents

Abstract

PURPOSE:To improve the utilizing efficiency of a line by making correspondence while extending the polling period of a device decided as the communication is in fault and stopping the correspondence when the faulty state continues for a long time. CONSTITUTION:A transceiver transmits (19) a transmission request to a remote controller to which polling information is set, receives (20) a reply data from the remote controller so as to discriminate (21) whether or not the data is normal. When normal, the processing 34 is conducted so as to apply polling 29 of the next remote controller. When faulty, the number of times is counted by the 1st counter 23, and when the count is counted up, the polling period is extended according to the 2nd count section B. The number of times decided as a fault at the period decided by the 2nd count section B is counted by the 3rd count section C and if the fault continues longer, the correspondence is stopped and the next remote controller is subject to polling 30.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a signal transmission system in which signals are sent and transmitted by alternate monitoring between a transmitting/receiving unit as a main station and a plurality of remote control devices as slave stations. Regarding equipment.

The configuration of the conventional example and its questions When performing reliable transmission between the source point normal transmitting/receiving device j,'i and the remote control device 1''''t by alternately viewing 'if:i', is the transmitting/receiving device f'? sends a weak transmission to the remote control device, and the remote control device responds with the requested data.

However, if one of the multiple remote control devices malfunctions due to a poor transmission line connection or a temporary drop in signal level due to water droplets, data will not be returned to the transmitting/receiving device in response to a transmission request, and the The transmitter/receiver is in standby mode.

In particular, when a reception error occurs, the transmitter/receiver takes longer to wait than the normal communication time, and if the remote control device continues to malfunction, the transmission line will be unnecessarily occupied and the line usage efficiency will deteriorate. It had a point.

OBJECTS OF THE INVENTION The present invention provides a signal transmission device that improves the usage efficiency of transmission lines in view of the drawbacks mentioned above.

Configuration Note of the Invention In order to achieve the object, the signal transmission device of the present invention includes a microcomputer (hereinafter abbreviated as microcomputer) that processes a signal, a modulation circuit that modulates all the signals from the microcomputer, and a signal transmission device that converts the signal from the modulated signal. The microcomputer has a demodulation circuit that outputs the signal to the take-out microcomputer, and a signal superposition/separation circuit that completely superimposes or separates the signal from the DC power source.
Distinguish 53! a reception section that determines whether the reception is normal; a reception determination section that determines whether or not the reception is normal; and a first counting section that counts the number of communication abnormalities in communication between the remote control device and the transmitting/receiving device branched from the reception determining section. , a second counting section that branches from the output of the first counting section and determines the polling cycle of the remote control device that is determined to be abnormal in communication; and a third counting section that branches from the second counting section and determines that there is a normal abnormality and stops communication. a first polling setting section that updates the address of the output light in response to a normal transmission request; and a second polling setting section that updates the address of the output light in response to an abnormal transmission request.

With this configuration, it was possible to improve line usage efficiency by -1.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the signal transmission device of the present invention. In FIG. 1, 1 is a transmitting/receiving device, 2a
, 2b, 2c are remote control devices for remotely controlling the transmitting/receiving bag Fi, and 3a13b is the transmitting/receiving device 1 and the remote control device 2a,
This is a transmission line that connects all 2b and 2c.

Reference numeral 4 denotes a power supply circuit that converts alternating current from the commercial power supply 5 into direct current and supplies power to the transmitting/receiving device and the remote control device.

6 is a microcomputer (hereinafter abbreviated as microcomputer);
The take signal "take signal" is output to the modulation circuit 7. The take signal modulated by the modulation circuit 7 is output to the signal multiplexer circuit 8. The modulation signal (modulated take signal) is output to the coil 9. The signal is generated on the primary side 9-1, appears on the secondary side 9-2, and is sent to the transmission lines 3a, 3b via the capacitor 10, and transmitted to the remote control devices 2a, 2b.

2c.

Conversely, the modulation value 93 transferred from the transmission line 3a13b
' - occurs on the secondary side 9-2 of the coil 9, and the primary side 9-1
appears in This modulated signal is input to the demodulation circuit 11, which extracts the entire theta signal and outputs it to the microcomputer 6. The capacitor 10 allows the modulation value to be applied to the power supply, and vice versa, to separate the voltage from the power supply.

When the modulation values are sent to the transmission lines 3a, 3b, the signal superimposition/separation circuits 12a, 12b of the remote control devices 2a, 2b, 2c
, 12c. First, the modulation signal is
3a, it is generated in the secondary coil 14a-2 of the coil 14a, appears on the primary side 14a-1, and enters the demodulation circuit 1'5a. The take signal demodulated by the demodulation circuit 15a is input to the microcomputer 16a. 17a is a modulation circuit which modulates the entire take signal output from the microcomputer 16a and sends it to the transmission lines 3a and 3b via the signal superimposition and separation circuit 12a. Ru. A power supply circuit 18a supplies the DC power transmitted from the transmission/reception bag h''1 to the circuit.

Note that the remote control devices 2b and 2c have the same circuit configuration as the remote control device 1 item 2a, and the corresponding number 5 is (=1) (TIk is omitted).

Figure @2 is a flowchart of an embodiment of the microcomputer of the present invention.

Reference numeral 19 outputs a take signal from a sending section. , 20, the signal 5 input from the demodulation circuit 11 is determined and stored in the receiving section. 21 Receive ゛ In P11 constant section, determine rj1 whether the take has been received normally in the receiving section 20 and decide the branch destination 1;
When the reception determination unit 21 determines that there is an abnormality, the abnormality determination unit 2
Proceed to step 2. A is a first counter, and 23 is a first counter that counts the number of passes when the abnormality determination unit 22 does not determine that reception is abnormal. 24 is the first kakunku!
In the leap section, it is determined whether the first power kunk 23 has completed counting. Once completed, the process proceeds to the second counting section B. The abnormality flag setting unit 25 sets a flag indicating that the remote control device with which the communication has occurred is in a communication abnormality. second counter 26
counts the number of times the error flag has been set. Next, the second counter determination unit 27 checks the count status of the second counter 26 with I! ll determine.

However, if the count has not increased, the process proceeds to abnormality flag determination stage 28. The abnormality flag determining unit 28 determines whether the abnormality flag is set, and if it is not set, the process proceeds to the first polling setting unit 29 and selects the next l/i'' address 2 of the remote control that should be attached. Also, when the abnormality flag is set, the process proceeds to the second polling setting section 30 and sets the address of the remote control device next to the remote control device to be received next.The second counter 26 counts When the count is up, the process proceeds to a third counting unit C, which counts how many times the second counter 26 has exceeded the count.
If 1 has not completed counting, the process returns to the first polling setting section 29, and 1 is completed. The process branches to a U-blade constant flag setting section 33.

When the flag is set in the abnormality confirmation flag setting unit 33, the process branches to the second polling setting unit 3O and specifies the remote control device two addresses ahead. When this flag is set, the abnormality determination unit 22 always controls the second polling setting unit 3O.
Branch into.

The following is a case where the reception determination unit 21 determines that the reception is abnormal.
If it is received normally, the process proceeds to the processing section 34 and processes the reception take. Reference numeral 35 denotes an abnormality flag reset unit which sets an abnormality flag '(rl) indicating that the remote control device with which communication was abnormal in previous communications.

Next, the process proceeds to the second counter pH section 27, and the following is the same as that described above.

If the transmitting/receiving device 1 and the remote control devices 2a, 2b, 2c are communicating normally, the processing unit 34 performs a take process and the first
The process advances to the polling setting section 29 and all next remote control devices are designated. Next, the transmitter 19 transfers the take to the designated remote control device, and the receiver 2O receives data from the other party. Here, if reception is not possible for some reason, it branches from the reception determination section 21 and sends the first
Proceed to counting section A. The first counter determination unit 24 does not process the take and ignores it when the count is not up. This state is repeated and the first counter 23
When the count is up, the abnormality flag setting section 25 sets a flag indicating an abnormality in communication with the remote control device. Thereafter, the abnormality flag is checked in the abnormality flag determining section 28, and when it is set, the process proceeds to the second polling setting section and the next remote control device is specified without specifying the address of the remote control device indicating the abnormality. In this way, the normal remote control device 2a
, 2b, 2cl The first and second counters 26 communicating with the transmitting/receiving device 1 have a function of giving an opportunity to output a transmission request to the remote control device on which the abnormality flag has been sent. When the second counter 26 completes counting, the first counter 23 is moved (c).

The third counting section C outputs a transmission request until the count is amplified by clearing all 0 of the Ij period and communicating.The third counting section C is polling +r'; the J period is lengthened to determine how many times the remote controller is attached and communicated. When it reaches a certain number of times, it is considered to be a complete failure, and the abnormality confirmation flag setting section 33 sets a confirmation flag, and thereafter communication with the transmitting/receiving device 1 is stopped.

In this way, the transmitting/receiving device 1 and the remote control devices 2a, 2b
, 2c, the polling cycle of the remote control device determined to be abnormal is lengthened, and the line is used with the normal remote control device. If normal communication becomes possible during this time, the polling cycle will be returned to the original one. On the other hand, if the abnormal condition continues for a long time, communication will be stopped in order to use the line more efficiently.

As can be seen from the effects of the invention, the reliable transmission device of the present invention provides a transmitting/receiving device and a remote control device (including a microcomputer that processes take and a modulation circuit that modulates the take output from the microcomputer). Conversely, the microcomputer is equipped with a demodulation circuit that demodulates and outputs the reading value υ, and a signal superposition/separation circuit that superimposes or separates the power supply and the signal. Whether or not the take was successfully received with the receiving section; r: 't-1 fixed reception!...j Satebe Ube Branches from the output of the reception judgment section and counts the number of communication abnormalities between the transmitting/receiving device and the remote control attached. a first counting section to
a second counting section that branches from the output of the first counting section and determines a transmission request period for the remote control device that has been determined to have a communication abnormality; It is composed of a third counting section that counts the number of times, a first polling setting section that is updated during normal communication, and a second polling setting section that is updated during abnormal communication. By changing the polling cycle and stopping communication if the abnormal condition continues, we have achieved the effect that efficient line control can be performed without the line being monopolized by a faulty remote control device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a trust transmission installation according to an embodiment of the present invention, and FIG. 2 is a flowchart of the same. 1... Transmitting/receiving device, 2a, 2b, 2C...-
・Remote control device, 3a, 3b..., ・Transmission line, 6...
... Microcomputer, 7 ... Modulation circuit, 9 ... Signal superposition and separation circuit, 11 ... Demodulation circuit, 20 ... Receiving section, A ... ...@1 counting part, B...2nd counting part, C...
...Third counting section, 29...First polling setting section, 3O... Second polling setting section.

Claims (1)

[Claims] A transmission line connects a transmitting/receiving device that transmits and receives No. 451, a plurality of remote control devices that remotely control the transmitting/receiving device, and the remote control device that controls the transmitting/receiving FI.
The transmitter/receiver and the remote control frequency divider include a microphone O':l, which processes the 9J signal, and a modulation circuit that modulates the signal from the microcontroller, and a modulation circuit that modulates the signal from the microcontroller. a demodulation circuit that outputs to the microcomputer;
The microcomputer has (1
- A receiving unit that discriminately determines the
'4. i1. Receive to set the number and 9.
'lJ fixed part and +jrj registration 'l'! A first counting section branches off from the I constant section and counts the number of communication abnormalities during communication with the remote control unit ``?'' and ``l゛''.
A second counting section that branches from the output of the counting section and determines the entire polling cycle of the remote control device F (which is determined to have a communication abnormality), and a second counting section that branches from the second counting section and stops communication when a communication abnormality is confirmed. During normal communication with the third counting section,
a first polling setting unit that updates the address of the transmission requesting blade; and a second polling setting unit that is connected in parallel to the first polling setting unit and updates the address of the transmission requesting blade when abnormal communication occurs.
A signal transmission device consisting of a polling setting section and a polling setting section.