JPS62235898A - Remote supervisory and controlling slave station equipment - Google Patents

Abstract

PURPOSE:To transmit data of higher urgency to a master station without waiting for the completion of the transmission of preceding transmission text data of low urgency by providing a transmission procedure control part for indexing a priority in a remote supervisory and controlling slave station equipment. CONSTITUTION:The transmission procedure control part 3, at the time of receiving a processing request and after the transmission request of one text is completed to be informed to a transmission data input/output drive part 4, the priority number of all the transmission request texts D1, D2, D3 or the like loaded on a queue 2 is indexed by the linkage pointer of the queue 2 and the linkage pointer of the transmission request text D3 having the highest priority number '1' in the queue 2 is loaded on the foremost part by a change. Then, the transmission procedure control part 3 registers the priority number and requests for the transmission of the transmission request text D3 to the transmission data input/output drive part 4. Thereby, the transmission data input and output drive part 4 starts the transmission of the text data.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a remote monitoring and control slave station device.

[Conventional technology]

Conventionally, this type of remote monitoring and control slave station device (hereinafter referred to as slave station device) receives state digital input data.

Most alarm digital input data and analog input data are sent to a remote monitoring and control master station device (hereinafter referred to as the master station device) at regular intervals, but changes in input data at slave station devices are immediately transmitted to the master station device. Therefore, when a change in digital input data or a change larger than a predetermined value is detected in analog input data, the slave station device immediately transmits the changed data based on its judgment. There is something to do. In addition, since there are cases where the master station device wants to monitor even minute changes in analog data, in addition to the function of transmitting when such a change is detected, the system also has a function of transmitting current status data at regular intervals. There is something. In addition to transmitting these monitoring data to the master station, the slave station receives control commands sent from the master, outputs control signals, and transmits control response signals to the master.

In conventional slave station devices, these monitoring data and control response signals are transmitted in order from the slave station to which the transmission request was issued earliest. Therefore, even if a highly urgent state change occurs when there is a lot of data in the queue for data transmission, the master station will not be able to reach the master station unless it waits until all the data in these queues has been transmitted in order. Not transmitted.

[Problem that the invention seeks to solve]

In the conventional slave station device described above, even if high-urgency data occurs while transmitting low-urgency data, the transmission is forced to wait, resulting in a significant delay in receiving high-urgency data at the master station. There are drawbacks.

[Means for solving problems]

The slave station device of the present invention includes a transmission data editing processing unit that edits transmission text data by adding priority numbers determined according to the urgency of each data to be transmitted from the slave station to the master station, and the transmission data editing unit. a transmission procedure control section that receives a transmission processing request from a processing section, registers the priority number of the transmission text data, and controls the transmission procedure of the transmission text data; and a transmission data input/output drive unit that transmits the transmission text data to the master station.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a functional block diagram showing an embodiment of a slave station device of the present invention.

In the figure, the slave station device includes a transmission data editing processing unit 1. It includes a transmission procedure control section 3 and a transmission data input/output driving section 4. First, the transmission data editing processing section 1 edits the transmission text data, adds a priority number predetermined according to the type of data, and requests the transmission procedure control section 3 for transmission processing. Since the data transmission time generally takes longer than the internal processing time, this transmission processing request creates a queue 2. Upon receiving a processing request and after notifying the transmission data input/output drive unit 4 of a transmission request for one text, the transmission procedure control unit 3 prioritizes all transmission request texts DI + D2 + D3 etc. that are not loaded into the queue 2. index the rank number by its queue 2 linkage pointer;
The linkage pointer of the transmission request text (D3 in this case) with the highest priority number "1" in the queue 2 is changed to be loaded at the front.0Then, the transmission procedure control unit 3 changes that priority number to It then requests the transmission data input/output driver 4 to register the transmission request text D3.

As a result, the transmission data input/output drive unit 4 starts transmitting text data, but upon completion of the request notification, the transmission procedure control unit 3 returns to the process of indexing the queue 2 for the next text transmission. If the priority of the next text is lower than the priority of the text currently being transmitted, the process is temporarily terminated without importing the transmission request text, and a data transmission completion interrupt from the transmission data input/output driver 4 or transmission data is sent. It waits until the next transmission request from the editing processing section 1 arrives. However, if the priority of the next text is higher than the priority of the text currently being transmitted, the transmission procedure control unit 3 requests the transmission data input/output driver 4 to forcibly interrupt the transmission,
The transmission data input/output driver 4 interrupts data transmission for the text being transmitted and starts transmitting the next text.

When the transmission data input/output drive unit 4 normally completes the transmission of the text I, it notifies the transmission procedure control unit 3 of completion. The transmission procedure control unit 3 extracts the currently transmitted text from the queue 2 and deletes the priority registration of the text I.

In this way, the transmission request text D in queue 2,
~D3, etc., or by forcibly interrupting data transmission, it is possible to notify the master station device of more urgent data as soon as possible without waiting for the data transmission of the preceding text.

Next, FIG. 2 is a circuit block diagram showing an example of the configuration of a slave station device equipped with the functions shown in FIG. Regarding response data for control, the processing program stored in the main memory circuit 15 is read out via the pass line 17 and executed in the arithmetic processing circuit 1.
4, the data of each transmission request text is transmitted to the new station device through the transmission control circuit 16 in accordance with the priority order.

〔Effect of the invention〕

As explained above, the present invention provides a transmission procedure control unit that performs priority indexing in a remote monitoring and control slave station device, thereby achieving
This has the advantage that data with a higher degree of urgency can be transmitted to the master station without waiting for the end of the transmission of the preceding text data with a lower degree of urgency.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing an embodiment of the slave station device of the present invention, and FIG. 2 is a circuit block diagram showing an example of the configuration of the slave station device having the functions shown in FIG. 1. ]...Transmission data editing processing unit, 2...Queue, 3
...Transmission procedure control unit, 4...Transmission data input/output drive unit, 11...Analog signal input circuit, 12...Status data input circuit, 13...Control signal output circuit, 14... Arithmetic processing circuit, 15...main memory circuit, 1
6...Transmission control circuit, 17...Pass line.

Claims (1)

[Claims] A transmission data editing processing unit that edits transmission text data by adding priority numbers determined according to the urgency of each data to be transmitted from the slave station to the master station, and a transmission processing request from the transmission data editing processing unit. a transmission procedure control unit that receives and registers the priority number of the transmission text data and controls the transmission procedure of the transmission text data; and a transmission procedure control unit that transmits the transmission text data to the master station according to instructions from the transmission procedure control unit. A remote monitoring and control slave station device comprising: a transmission data input/output drive section that transmits data.