JPH0530583A - Remote control system - Google Patents

Abstract

PURPOSE:To easily and visually check a terminal resistance setting station without using a programming unit. CONSTITUTION:This remote control system is provided with flip flops 4, 5 (FFs) and light emitting diodes LEDi1-LEDi2. Data Di express the i-th data and indicate also the office number of a slave station. The diode LEDi1 for connecting the slave station is turned on when the data Di is '1' and a write signal WR1B (B means bar) is outputted. When the same slave station is a terminal resistance setting station, a write signal WR2B is outputted and the diode LEDi$2 for the terminal resistance setting station is turned on. Thereby when the i-th slave station is the terminal resistance setting station, the terminal resistance setting station can be easily and visually confirmed by the ON of the diode LED i2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote controller system for reducing the wiring and distributing I / O in a programmable controller which is an industrial device.

[0002]

The remote control system using the Related Art master station 1 and a plurality of slave stations 2 ₁ to 2n shown in FIG. CPU1 for the master station 1
a, the power supply unit 1b and the like are provided, a plurality of slave stations 2 ₁ to 2n are connected to the signal line 3. Master station 1 and slave stations 2 _{1 to} 2n
Signals are transmitted and received between and by the time division multiplex transmission, and the load connected to the slave station 2 is controlled.

[0003]

By the way, a terminating resistor is set in a certain slave station 2 so as to stably transmit a signal transmission. However, in conventional systems, in order to know the terminating resistor setting station, check the data that describes the document was only slide into one single sure 2 ₁ to 2n master station 1 and slave station .

The present invention has been made in view of the above points, and provides a remote control system for the purpose of easily observing the termination resistance setting station visually without using a programming unit. is there.

[0005]

According to the present invention, a master station and a plurality of slave stations are provided, and data is communicated between the master station and the slave stations via a signal line to be connected to the slave stations. A remote control system for controlling a load that is present, and in a remote control system in which a terminating resistance is set in any of the slave stations, a detecting means for detecting the slave station in which a terminating resistance is set, and a signal line at the output of the detecting means. And a display unit for displaying the slave station and the terminal resistance setting station connected to each other by using display elements having different colors from each other.

According to a second aspect of the present invention, a master station and a plurality of slave stations are provided, and data communication is performed between the master station and the slave stations via a signal line to reduce the load connected to the slave stations. A remote control system for controlling, in a remote control system in which a terminating resistance is set in any of the slave stations, a detecting means for detecting the slave station in which the terminating resistance is set, and a signal line connected to the signal line at the output of the detecting means The display unit is provided with a display for displaying the slave station or the terminating resistance setting station, and a switch for switching whether to display the termination resistance setting station on the display unit.

[0007]

By detecting the slave station to which the terminating resistance is set and displaying the color indicating that it is the terminating resistance setting station on the display element, the terminating resistance setting station is programmed by the programming unit. It can be easily confirmed visually without using. In addition, switch the switch to the indication that it is the terminal resistance setting station, detect the slave station with the terminal resistance set, and display the display element with the detection output to display the terminal resistance setting station. It can be easily confirmed visually without using a programming unit.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a circuit diagram of a main part of the master station 1, which is composed of flip-flops 4 and 5, light emitting diodes LEDi ₁ and LEDi ₂ . Here, the data Di represents the i-th data, and thereby also indicates the station number of the slave station. The light emitting diodes LEDi and LEDi ₂ emit different colors.

Light-emitting diode LEDi for connecting station of slave station
₁ indicates that the data Di is 1 and the write signal WR ₁ B (B is B
is output), the flip-flop 4 is inverted, the QB output becomes L level, and the light emitting diode LEDi ₁ is turned on. This time,
If the same slave station is the termination resistance setting station, the write signal WR ₂
B is output, the flip-flop 5 is inverted, the QB output becomes L level, and the light emitting diode LEDi ₂ for the termination resistance setting station lights up. Therefore, in this case, the i-th slave station is the termination resistance setting station, and the light emitting diode LEDi
It is possible to easily visually confirm that the terminal resistance setting station is lit by lighting ₂ .

FIG. 2 shows an operation time chart of the circuit of FIG. 1, and A and B show QB outputs of the flip-flops 4 and 5. Here, the output of the write signal WRB corresponds to the software of the program, and its flowchart is shown in FIG. In FIG. 3, the master station sets the connection station when the master station power is on in the connection station table, and if it is the termination resistance setting station, also sets it in the termination resistance setting station table. When all the slave stations (connection stations) have been initialized, the connection stations and termination resistance setting stations are displayed during normal scanning. Then, the communication with the normal connecting station starts.

The detecting means is composed of the CPU 1a,
Light emitting diode LEDi, LEDi ₂Configure the display with
is doing. (Embodiment 2) FIG. 4 shows Embodiment 2 in which the CPU 1a outputs
The input data Di is the i-th data as in the previous embodiment.
Data, and hence the area code. Light emitting diode
When the data Di is 1, the write signal WRB is
When output, flip-flop 6 is inverted and QB output
Becomes L level and lights up.

Here, the switch S provided on the CPU 1a side
When W ₁ is off, the connected station is displayed, and when it is on, the terminal resistance setting station is displayed. The display switching switch SW ₁ corresponds to the software of the program, and its flowchart is shown in FIG. In FIG. 5, the master station sets the connection station when the power of the master station is turned on in the connection station table, and if it is the termination resistance setting station, also sets it in the termination resistance setting station table. When all the slave stations (connection stations) have been initialized, the connection station or the termination resistance setting station is displayed depending on the switching state of the switch SW ₁ during a normal scan. Then, the communication with the normal connecting station starts.

[0013]

As described above, the present invention is provided with a master station and a plurality of slave stations, communicates data between the master station and the slave stations via a signal line, and is connected to the slave stations. A remote control system for controlling a load that is present, and in a remote control system in which a terminating resistance is set in any of the slave stations, a detecting means for detecting the slave station in which a terminating resistance is set, and a signal line at the output of the detecting means. Since it has a display unit that displays the slave station connected to the terminal and the terminal resistance setting station with display elements of different colors, it detects the slave station with the terminal resistance set and outputs its detection output. By displaying a color indicating that the terminal resistance setting station is displayed on the display element, the terminal resistance setting station can be easily visually confirmed without using a programming unit. .

According to a second aspect of the present invention, a master station and a plurality of slave stations are provided, and data communication is performed between the master station and the slave stations via a signal line to reduce the load connected to the slave stations. A remote control system for controlling, in a remote control system in which a terminating resistance is set in any of the slave stations, a detecting means for detecting the slave station in which the terminating resistance is set, and a signal line connected to the signal line at the output of the detecting means Since it has a display unit for displaying a slave station or a terminal resistance setting station, and a switch for switching whether the display is a terminal resistance setting station or not, the switch is a terminal resistance setting station. It is switched to the display indicating that the terminal resistance is set, the slave station with the terminating resistance is detected, and the display element is displayed by the detection output, so that the terminal resistance setting station can be visually checked without using a programming unit. You can easily check In which an effect that can.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a main part of a master station according to an embodiment of the present invention.

FIG. 2 is an operation waveform diagram of FIG. 1 above.

FIG. 3 is a diagram showing a flowchart of the above.

FIG. 4 is a circuit diagram of a main part of a master station according to a second embodiment.

FIG. 5 is a diagram showing a flowchart of the above.

FIG. 6 is a schematic configuration diagram of a remote control system.

[Explanation of symbols]

1 parent station 2 slave stations 3 signal lines

Claims (2)

[Claims] 1. A remote control system comprising a master station and a plurality of slave stations, wherein data is communicated between the master station and the slave stations via a signal line to control a load connected to the slave stations. In a remote control system in which a terminating resistor is set in any of the slave stations, a detecting means for detecting the slave station in which the terminating resistance is set, and a slave station connected to the signal line at the output of the detecting means A remote control system comprising: a display unit that displays with a terminal resistance setting station by using display elements having different colors. 2. A remote control system comprising a master station and a plurality of slave stations, and performing data communication between the master station and the slave stations via a signal line to control a load connected to the slave stations. In a remote control system in which a terminating resistance is set in any of the slave stations, a detecting means for detecting the slave station in which the terminating resistance is set, and a slave station connected to a signal line at the output of the detecting means or A remote control system comprising: a display section for displaying a terminal resistance setting station; and a switch for switching whether the terminal resistance setting station is displayed on the display section.