JPH0247905B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a zone switching method in an MCA (multi-channel access) system.

(2) Background of the technology The MCA system is a wireless system in which a large number of terminal stations share multiple frequency channels and transmit data.The channels are switched under the control of a central station installed in each zone. Sharing.
A terminal station in such an MCA system usually switches its own zone code to match a different frequency channel for each zone so that it can operate in multiple zones.

In recent years, MCA systems have also made it possible to transmit data between different zones.
By specifying the zone code of the other station, communication is performed via the central station of each zone.

(3) Prior art and problems As mentioned above, each terminal station switches its own zone code depending on the zone in which the terminal station is located, or changes the zone code for calling the other station depending on the zone of the other station to which data is sent. You need to switch. In conventional terminal stations, such zone switching is performed using a rotary switch or a pushbutton switch.・It performs code switching.

However, in the conventional zone switching method using the above-mentioned rotary switch or pushbutton switch, even if there is an area in the storage circuit where no zone code is written, the address can be specified and the zone code can be read. It was meant to be used as an exit. Therefore, there are problems in that it takes time to select a predetermined zone code, and that the wrong zone code may be selected due to an erroneous operation.

(4) Purpose of the Invention The present invention has been made in view of the problems of the prior art described above, and it is an object of the present invention to enable the terminal station to perform two types of zone switching operations quickly and accurately. It is an object.

(5) Structure of the invention In order to achieve the above object of the invention, the present invention includes the following:
In a zone switching device which performs reading from a storage circuit in which a zone code is written in advance by switching a read address in response to a signal from a zone switching switch, the data read from the storage circuit is sequentially checked. If reading is performed at an address in which no zone code is written, reading from the memory circuit is performed by switching the read address until the zone code is read, and The present invention provides a zone switching method characterized in that a zone number corresponding to a code is displayed.

(6) Embodiment of the invention Hereinafter, an embodiment of the invention will be described with reference to the drawings.

The figure is a block diagram showing the configuration of the main parts of the zone switching device according to the present invention, in which 1 is an input terminal, 2 is a detection circuit, 3 is a counter, 4 is a check circuit, and 5
6 is an address selection circuit, 6 is a storage circuit, and 7 is a display circuit.

First, when a signal from a zone changeover switch (not shown) is input to the detection circuit 2 via the input terminal 1, the detection circuit 2 detects a changeover command, thereby incrementing the counter 3. The count value of the counter 3 is read by a check circuit 4, and the read address of the memory circuit 6 output from the address selection circuit 5 is switched accordingly.

The check circuit 4 checks the data read from the memory circuit 6, and if it is determined that the data has content that has been written in the memory circuit 6 in advance, the data is stored in the zone.
It is transferred as a code to a predetermined wireless device control unit.
At the same time, the count value of the counter 3 at the time of data reading is displayed on the display 7. The count value of the counter 3 corresponds to the address of the memory circuit 6, and is recognized by the operator as a zone number corresponding to each zone code written in the memory circuit 6 in advance.

On the other hand, the check circuit 4 specifies the address of the area in the memory circuit 6 where no data has been written,
If it is determined that the data has been read out, the counter 3 is counted up again and the above-described operation is repeated. Furthermore, if the check circuit determines that invalid data has been read out, the count value of the counter 3 is not displayed on the display circuit 7. That is, the display circuit 7 displays only the zone number corresponding to the zone code written in advance in the storage circuit 6, and skips the zone number that has not been written in advance and does not display the zone number.

As described above, in the present invention, when switching between zones, data can be read from the memory circuit in which the zone code is written by sequentially skipping the last written portion of the memory circuit. It can be done quickly. Furthermore, when a zone code written in advance in the storage device is read out, the corresponding zone number is displayed, which prevents the operator from erroneous operation.

Further, in the present invention, as shown in the figure, the detection circuit 2
A timer 8 is provided at the switch, and the counter 3 can be continuously counted up by detecting that the signal from the changeover switch is continuously input for a certain period of time or more. Here, we will use the toggle switch.
By keeping it ON, you can continuously switch zone codes and check these code numbers. That is, the operator, while checking the display 7, continues until the predetermined zone number is displayed.
All you have to do is keep pressing the changeover switch.

(7) Effects of the Invention As described above, according to the present invention, when changing the own zone code depending on the zone in which the own station exists, and when changing the zone code for calling the other station depending on the zone of the other station sending data, In any case of code switching, it is possible to skip zone codes that have not been previously written in the storage circuit and select a predetermined zone code easily and quickly.
Further, when a predetermined zone code is read out, the zone number corresponding to the zone code is displayed for the operator to confirm, thereby preventing erroneous operations.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention.
In the figure, 2 is a detection circuit, 3 is a counter, 4 is a check circuit, 5 is an address selection circuit, 6 is a storage circuit, and 7
is a display, and 8 is a timer.

Claims (1)

[Claims] 1. In a zone switching device that performs reading from a storage circuit in which a zone code is written in advance by switching the read address in response to a signal from a zone switching switch, the data read from the storage circuit is sequentially checked. However, when reading is performed at an address in which no zone code is written, reading from the memory circuit is performed by switching the read address until the zone code is read, and - A zone switching method characterized by displaying the zone number corresponding to the code.