JPS60109347A - Polling type remote monitor controller - Google Patents

Abstract

PURPOSE:To integrate the time points among slave stations by sending the time information obtained in consideration of both the data processing time and the data transmission time of a master station to slave stations and performing the initialization and the correction of a timepiece device of each slave station every slave station. CONSTITUTION:A master station A is connected to slave stations B and B' via transmission lines 8 and 9 to perform the transfer of data. The stations B and B' perform sampling of slave station information C and C' and transmit the state change data with time points to the station A according to a command given from the station A. A master timepiece device 10 is provided to the station A, and the time data of the device 10 are sent to the stations B and B' with corrections received in consideration of the data processing time and the data transmission time. Based on the received time data, the stations B and B' perform the initialization and corrections for timepiece devices 7-1 and 7-2 respectively. Thus it is possible to integrate the timepiece devices of stations B and B'.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an I-ring type remote monitoring and control device, in particular, a time synchronization clock device for detecting the time of an accident provided in each slave station, and a clock device on the master station side. The present invention relates to a polling type remote monitoring and control device in which information is transmitted via an information transmission path.

[Technical background of the invention]

FIG. 1 is a block diagram of a remote monitoring and control system to which the present invention is applied. In the figure, A is the master station remote monitoring side (i111 device (hereinafter referred to as the master station)), which is connected to each slave station remote monitoring and control device (hereinafter referred to as the slave stations) B, 13' by a transmission line 8.9. The data processing device 1-0 in the master station is connected to a parallel-to-serial converter (hereinafter referred to as P/S) for each slave station.
The converter) 2-0 and the modulator 4-0 output commands to each slave station in a time-division manner via the transmission line 8, while each slave station responds to the command. The information sent via the transmission path 9 is sent to the controller 5-0. Serial-to-parallel converter (hereinafter referred to as s/p
It is imported via 3-0.

At each master slave station B, B', the command from the master station is transmitted via the transmission line 8 to the demodulator 5-1.5-2, and then to the S/P converter 3-1. Processing device 1-1.1
-2 and determines the command, and if this is for the own station, line switch 6-1.6-2'
i Close and transfer the corresponding slave station information C9C' to the converter 2-1.2-
2. Modulator 4-1゜4-2. Furthermore, line switch 6-1
．． 6-2, each slave station information C1C is transmitted to the master station through the output to the transmission line 9.

In addition, each slave station constantly samples its slave station information c and c'2, and when slave station information is generated, it reads the time input from the clock device 7-1.7-2 provided to the slave station and uses this. is added to the condition change data to create condition change data with time (hereinafter S
OE data (referred to as OE data) is created and registered, and the registered data is transmitted to the master station in response to a command from the master station. Therefore, the master station can know the time when the status change of each slave station occurs.

[Problems with background technology]

In the conventional system described above, the clock devices installed in each slave station are independent. Therefore, in order to synchronize the clock devices of all slave stations, the remote monitoring and control system uses, for example, time information from a radio. This had to be done using a different system.

[Purpose of the invention]

The present invention has been made with the entire purpose of solving the above-mentioned problems.The present invention is a polling type remote monitoring and control device that enables the time adjustment of clock devices installed in all slave stations to be performed within the remote monitoring and control system. is intended to provide.

[Summary of the invention]

In the present invention, a master clock device is provided in the master station, and on the master station side, time information of the master clock device is monitored by the following two-stage time determination circuit. That is, in the first stage of time determination, the transmission control of the data processing device that transmits from the master station to the slave station is stopped and the data processing device is placed in a standby state, and in the second stage of time determination, the data processing device of the master station transmits data to the slave station. By disconnecting the transmission line for the master station and connecting it to the time information transmitting circuit of the master station clock device, the time information of the master station is transmitted to all slave stations, and each slave station that receives this transmits the information. This system attempts to fully correct the clock devices of each slave station based on time information.

[Embodiments of the invention]

Embodiments will be fully described below with reference to all the drawings. FIG. 2 is a system configuration diagram of an embodiment of the polling type remote monitoring and control device according to the present invention. In FIG. 2, the same reference numerals as in FIG. 1 correspond to the same functions. 10 is a master station clock device, 11° and 12 are first and second stage time input judgment circuits, 13 is a time input correction circuit, 14.15 is an interrupt generation circuit 1, 2, and 16 is a time data transmission circuit. circuit, 17ba A
ND circuit, 18 is a switching circuit, 19-1.19-2 is a time data determination circuit, and 20-1.20-2 is a time data correction circuit.

Next, a series of operations 'f' will be explained. The time information from the master station clock device IO is input to the first stage time input determination circuit 11, the second stage time input determination circuit 12, and the time input correction circuit 13, respectively. The determination is made at a time t□ hours before the time when the time information is actually to be transmitted. Here, time t1 is the time required for the data processing device of the master station to complete processing for one slave station. Further, the second stage time input determination circuit 12 makes a determination based on the time at which all time information is actually transmitted. And the first stage time determination circuit 11
When the time input from the master station coincides with the time when the finger was pressed, the interrupt generation circuit 14 outputs a signal to the data processing device 1-0 to stop its processing and to wait. Similarly, the second stage time determination circuit 12 sends a signal to the interrupt generation circuit 15 on the condition that the time input matches the designated time and the first stage time input determination circuit 11 is already operating. 40 of the interrupt generating circuit 15 switches the selector switch 18 to disconnect the P/S converter 2-0 from the data processing side and connect it to the time data transmitting circuit 16. Furthermore, on the condition that the changeover switch 18 is completed, the time and money positive circuit 13 is fully activated. Is the time input correction circuit 13 activated by this activation number? Master station master device 10.1
:, 9 total time is added to the time t2 time, and the data is output to the time data transmitting circuit 16. Note that t is the time required for all +I information to be transmitted from the master station to the slave station. That is, the second stage time input determination circuit 12 is activated t2 hours before the desired transmission time, taking into account the entire time required for transmission. The time data transmitting circuit 16 converts all of this time data into time information to be transmitted, and transmits the information to the slave station by operating the P converter 2-0. Further, after the transmission of the information is completed, the interrupt generation circuits 14 and 15 are reset and restored to the initial state.

On the other hand, all the slave stations transmit the time information transmitted from the master station 11111 to the demodulators 5-1, 5-2 and the S/P converter using the same procedure as a normal command from the master station. Vessel 3-1.
3-2, and the time data judgment circuit 19-1.
19-2' to the time data correction circuit 20- of the valley station.
1. Delivered to 20-2.

At this time, the time data correction circuit of each slave station adjusts the received time information to the special conditions of the slave station, that is, the demodulator, 87
The clock device 7-1.7- of the slave station is corrected by taking into account the processing delay time of the P converter, etc., and based on the corrected time information.
Correct 2, and 1 is the default setting? Let's do it.

〔Effect of the invention〕

As explained above, according to the present invention, the first stage of the master station clock is first set in a standby state in consideration of the data processing time of the master station,
In the second stage, the entire transmission time is taken into account when transmitting, and the slave station that receives the transmission takes special conditions into consideration and corrects the clock device of each slave station. It is possible to provide all polling type remote monitoring and control devices that can unify the time of the time change data of slave stations.

[Brief explanation of drawings]

In FIG. 1, the present invention is applied. FIG. 2 is a system configuration diagram of an embodiment of the I-ring type remote monitoring and control device 6 according to the present invention. Aoo, master station B, B'...slave station C, C'...
Slave station information 1-0.1-1.1-2...Data processing device 2-0.2-1, 2-2...Parallel-serial converter 3
-0.3-1.3-2...Serial parallel converter 4-0.
4-1.4-2...Modulator 5-0.5-1.5-2
・・・Demodulator 6-1.6-2・;・Line switch
7-1.7-2... Clock device of slave station 8, 9... Transmission line 10... Clock device of master station 11... First stage time input determination circuit 12... Second stage Time input judgment circuit 13... Time input correction circuit of master station 14.15... Interrupt generation circuit 1, 2 16... Time data transmission circuit 17...
AND circuit 18...Selector switch 19-1.19-2...Slave station time data judgment circuit 20-1.20-2...Slave station time data correction circuit Patent applicant Tokyo Shibaura Electric Co., Ltd. Agent Patent Attorney Norio Ishii

Claims (1)

[Claims] Multiple slave stations each equipped with clock devices IT and K that detect the time of an accident share one transmission path, and in response to commands from the master station, the corresponding slave station exclusively uses the transmission path to transmit information. In the polling method remote monitoring tt+l control device,
On the master station side, the master station clock is the master that transmits all time information to each slave station. This is a polling method that is characterized by transmitting time information to the master station, and on the slave station side, initializing and correcting the clock device of each slave station independently based on the time information received from the master station. Supervisory control equipment.