JPS62104396A - Transmission system for state data - Google Patents

Abstract

PURPOSE:To transmit state data after a controlled system has a correct change by providing a slave station with a device which actuates the controlled system with a control signal from a master station and a device which detects the state change of the controlled system and commands time monitoring operation. CONSTITUTION:When the master station 1 sends out a control signal to controlled systems 41 and 42 from a slave station 3 through a data transmission line, the control system 41, for example, is actuated. The controlled system 41 sends a remote monitoring signal to a time monitoring command device 32 firstly and the device 32 commands a time monitoring device 33 to monitor the time. Part of the device 33 monitors an elapsed time corresponding to the system 41 and informs the device 34 of the end of the time. The device 34 transmits state data on the system 41 to the master station 1 through the transmission line 2. Consequently, the state data is never collected right after the controlled system is actuated.

Description

[Detailed Description of the Invention] [Summary] When a slave station collects state change data of a controlled object and transmits it to the master station, the slave station collects and transmits state data after the controlled object has changed correctly. , a state data transmission method with improved reliability.

[Industrial Field of Application] The present invention is a status data transmission method for controlling a controlled object via a slave station and collecting status data to a master station. [Prior Art] A control button is operated on a control console of a master station. When the control signal output is transmitted to the slave station, the slave station usually performs predetermined control over a plurality of control objects. The controlled object performs operations such as starting, stopping, and being in a half-open state according to the control. The slave station cyclically receives state data D 1 , D from a plurality of control targets in a predetermined order as shown in FIG.
2- After collecting the data and editing the data as necessary,
Furthermore, it is transmitted to the master station. Although state data is collected cyclically, there are various types of objects to be controlled.
Since the time required for a state change to occur after the start of control also varies, it is not always the case that the state data is captured exactly at the timing when the state data changes after the start of control. Furthermore, an alarm AL may be sent from the object to be controlled, and in this case, the slave station receives the alarm with priority over the status data, and delays the next data D4.

[Problems to be Solved by the Invention] Since different controlled objects enter different operating states under control, simply collecting state data cyclically in a predetermined order does not allow for sudden changes in state data depending on the controlled object. It may be slow to get it. In addition, when the data collection time comes immediately after control activation for a controlled object, only data whose state does not change is collected, and there is a risk that it may be mistakenly determined that the state has not changed due to control.

[Means for solving problems] FIG. 1 is a block diagram showing the configuration of the present invention.

In FIG. 1, 1 is a master station, 2 is a data transmission line, 3 is a slave station, 1) is a control console of the master station 1, 31 to 34 are devices provided in the slave station 3, and 31 is a terminal connected to the master station 1. 32 is a device that detects state changes from the controlled objects and instructs time monitoring, 3
3 is a time monitoring device; 34 is a device for transmitting status data;
41, 42...- indicates the controlled object.

[Operation] In FIG. 1, single-tree arrows indicate the flow of data, and double-tree arrows indicate the flow of control signals. When the master station 1 sends a control signal to the controlled object 41゜42- through the slave station 3 over the data transmission line (for example, by operating a control button on the control console 1), the control object 41゜42. For example, 41
is started. The controlled object 41 first issues a remote monitoring signal (for example, an SV double signal) to the device 32, so the device 32 instructs the device 33 to monitor the time.A part of the time monitoring device 33 records the elapsed time corresponding to the controlled object 41. It monitors and notifies the end of the time to the device 34. The device 34 transmits the status data of the controlled object 41 at that time to the master station 1 via the transmission line 2.

[Example] FIG. 2 is a diagram showing a specific example of the time monitoring device 33 in FIG. 1. In FIG. 2, 50 indicates a clock oscillation source, and 51.52 indicates a down counter. The initial setting values of the down counters 51, 52, . . . are determined based on the characteristics corresponding to the controlled objects 41, 42. There is startup control from master station 1, and s
When the v signal is issued, the down counter is counted.

Each counter is decremented by a clock from clock source 50, and when it reaches zero it issues a control signal to device 34 transmitting data. The device 34 transmits predetermined status data from the controlled object to the master station 1.

[Effects of the Invention] As described above, according to the present invention, there is activation control from the master station, and from the time when the generation of a remote control signal, etc.
Since the state data of the controlled object is transmitted after a predetermined period of time has elapsed, there is no need to collect state data immediately after startup. In addition, if monitoring times are appropriately selected for different control objects, state data can be collected without overlapping.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of the present invention, and Figure 2 is a block diagram showing the configuration of the present invention.
FIG. 3 is a diagram showing a specific example of the time monitoring device shown in FIG. 3, and FIG. 3 is a diagram showing a format in which status data is transmitted in a conventional system. 1 - Master station 2 - Data transmission line 3 - Slave station 1) - Control console 31 - Device for starting 32 - Device for commanding time monitoring 33 ------- Time monitoring device 34 --- Data transmitting device 41.42 --- Controlled object

Claims (1)

[Claims] Based on the control information from the master station (1), the slave station (3) starts the controlled objects (41), (42) -----, and
1) (42) In a state data transmission method that collects and transmits state data of 42) A device (31) that activates -------, a device (32) that detects state changes of controlled objects (41) (42) and instructs time monitoring, and a time monitoring device (33) a device (34) for transmitting status data by output; the slave station (3) starts up the controlled objects (41) and (42) and transmits the status data after a predetermined period of time; A state data transmission method characterized by transmitting.