JP2000165415A - Controller in can communication system - Google Patents
Controller in can communication systemInfo
- Publication number
- JP2000165415A JP2000165415A JP10338801A JP33880198A JP2000165415A JP 2000165415 A JP2000165415 A JP 2000165415A JP 10338801 A JP10338801 A JP 10338801A JP 33880198 A JP33880198 A JP 33880198A JP 2000165415 A JP2000165415 A JP 2000165415A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- terminating resistor
- control device
- line
- communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＣＡＮ通信システム
を備えた制御装置において、その通信に必要不可欠な終
端抵抗の設置方法に係わり、制御装置内に終端抵抗を設
置し、その専用端子を設けることで、制御装置の接続場
所がＣＡＮバスラインの何処に接続されても終端抵抗の
付外しや制御装置の改造無しで、終端抵抗の不必要に関
わらず一種類の制御装置でＣＡＮ通信が可能な制御装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a terminating resistor indispensable for communication in a control device provided with a CAN communication system. Therefore, regardless of where the connection point of the control device is connected to the CAN bus line, CAN communication can be performed with one type of control device regardless of the necessity of the termination resistor without removing the termination resistor or modifying the control device. The present invention relates to a control device.
【０００２】[0002]
【従来の技術】ＣＡＮ通信はＣＡＮバスラインである、
ＣＡＮ−Ｈライン及びＣＡＮ−Ｌラインに制御装置を接
続して実行される。ＣＡＮ−ＨラインとＣＡＮ−Ｌライ
ンの終端には、通信に必要不可欠な終端抵抗と呼ばれる
抵抗が接続されるが、この抵抗はＣＡＮ−ＨラインとＣ
ＡＮ−Ｌラインの終端に位置する制御装置に設置され
る。しかしながら、システムにおいては、その制御装置
がＣＡＮバスの終端に接続される場合とそうでない場所
に接続される等、何処に接続されるか分からない場合、
終端抵抗有りの制御装置と終端抵抗無しの制御装置の二
種類の制御装置を用意する必要があった。2. Description of the Related Art CAN communication is a CAN bus line.
This is executed by connecting a control device to the CAN-H line and the CAN-L line. At the ends of the CAN-H line and the CAN-L line, a resistor called a terminating resistor indispensable for communication is connected.
It is installed in the control device located at the end of the AN-L line. However, in the system, when it is not known where the control device is connected, for example, when the control device is connected to the end of the CAN bus or when the control device is not connected to the end,
It was necessary to prepare two types of control devices, a control device with a termination resistor and a control device without a termination resistor.
【０００３】[0003]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、制御装置内に終端抵抗を設置し、その専用
端子を設けることで、制御装置の接続場所がＣＡＮバス
ラインの何処に接続されても終端抵抗の付外しや制御装
置の改造無しで、終端抵抗の不必要を制御装置の端子で
切替えることにより、終端抵抗の不必要に関わらず一種
類の制御装置で対応することである。The problem to be solved by the present invention is that a terminating resistor is installed in the control device and its dedicated terminal is provided, so that the control device can be connected anywhere on the CAN bus line. Even if the terminating resistor is not required and the control device is not modified, by switching the terminal resistor unnecessary by the terminal of the control device, it is possible to cope with one type of controller regardless of the necessity of the terminating resistor. .
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、少なくともＣＰＵとＣＡＮ通信制御用ドライバと終
端抵抗を内臓しており、少なくともＣＡＮバスである、
ＣＡＮ−Ｈライン接続用端子，ＣＡＮ−Ｌライン接続用
端子，終端抵抗付き端子を持つもので、制御装置の接続
場所がＣＡＮバスラインの終端であっても、終端でなく
ても、つまり何処に接続されても終端抵抗の付外しや制
御装置の改造無しで、終端抵抗の不必要を制御装置の端
子で切替えることにより、終端抵抗の不必要に関わらず
一種類の制御装置でＣＡＮ通信に対応できる構成を採用
する。In order to solve the above-mentioned problems, at least a CPU, a CAN communication control driver, and a terminating resistor are incorporated, and at least a CAN bus is provided.
It has a terminal for CAN-H line connection, a terminal for CAN-L line connection, and a terminal with a terminating resistor. Whether the control device is connected at the end of the CAN bus line or not at the end, that is, where Even if it is connected, it is possible to use one type of control device to support CAN communication regardless of the necessity of the terminal resistance by switching the terminal resistance unnecessary with the terminal of the control device without removing the terminal resistor or modifying the control device. Adopt a configuration that can.
【０００５】[0005]
【発明の実施の形態】以下、本発明の実施例を図面に基
づき詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【０００６】図１は本発明を実施するためのＣＡＮ通信
システム構成図である。ＣＡＮバスであるＣＡＮ−Ｈラ
イン２とＣＡＮ−Ｌライン３に各制御装置(１〜ｎ)４が
接続され、ＣＡＮ通信が実行される。ＣＡＮ−Ｈライン
２とＣＡＮ−Ｌライン３の終端には、終端抵抗と呼ばれ
る抵抗１が接続される。この抵抗１はＣＡＮ−Ｈライン
２とＣＡＮ−Ｌライン３の終端に位置する制御装置に設
置される。FIG. 1 is a configuration diagram of a CAN communication system for implementing the present invention. Each control device (1 to n) 4 is connected to a CAN bus CAN-H line 2 and a CAN-L line 3, and a CAN communication is executed. A resistor 1 called a terminating resistor is connected to the ends of the CAN-H line 2 and the CAN-L line 3. This resistor 1 is installed in a control device located at the end of the CAN-H line 2 and the CAN-L line 3.
【０００７】図２は本発明を実施するためのＣＡＮバス
ラインに接続される制御装置の構成（１）を示す。本制
御装置は少なくともＣＰＵ５とＣＡＮ通信制御用ドライ
バ６と終端抵抗１を内臓しており、少なくともＣＡＮ−
Ｈライン接続用端子８，CAN−Ｌライン接続用端子９，
終端抵抗付き端子７を持つもので、終端抵抗１はCAN−
Ｈライン接続用端子８と終端抵抗付き端子７間に接続さ
れている。これにより、図１において、制御装置の接続
場所がＣＡＮ−Ｈライン２とＣＡＮ−Ｌライン３の終端
であっても、終端でなくても、つまり何処に接続されて
も終端抵抗１の付外しや制御装置の改造無しで、ＣＡＮ
バスラインの接続先を制御装置の端子で切替えることに
より、終端抵抗１の不必要に関わらず一種類の制御装置
で容易にＣＡＮ通信が可能な構成である。FIG. 2 shows a configuration (1) of a control device connected to a CAN bus line for implementing the present invention. This control device has at least a CPU 5, a CAN communication control driver 6 and a terminating resistor 1, and at least a CAN-controller.
H line connection terminal 8, CAN-L line connection terminal 9,
It has a terminal 7 with a terminating resistor.
It is connected between the H line connection terminal 8 and the terminal 7 with a terminating resistor. Thus, in FIG. 1, the connection location of the control device may or may not be the end of the CAN-H line 2 and the CAN-L line 3, that is, regardless of where the control device is connected, the connection of the terminating resistor 1 may be removed. CAN and without modification of the control device
By switching the connection destination of the bus line by the terminal of the control device, CAN communication can be easily performed by one type of control device regardless of the necessity of the terminating resistor 1.
【０００８】図３は本発明の第一の実施例を示す。４は
ＣＡＮバスラインであるＣＡＮ−Ｈライン２とＣＡＮ−
Ｌライン３に接続される制御装置であり、少なくともCP
U5とＣＡＮ通信制御用ドライバ６と終端抵抗１を内臓し
ており、少なくともＣＡＮ−Ｈライン接続用端子８，Ｃ
ＡＮ−Ｌライン接続用端子９，終端抵抗付き端子７を持
つもので、終端抵抗１はＣＡＮ−Ｈライン接続用端子８
と終端抵抗付き端子７間に接続されている。図１におい
て、制御装置の接続場所がＣＡＮ−Ｈライン２とＣＡＮ
−Ｌライン３の終端でない場合、つまり終端抵抗１が不
要な場合、CAN−Ｈライン２をＣＡＮ−Ｈ接続用端子８
に、ＣＡＮ−Ｌライン３をＣＡＮ−Ｌライン接続用端子
９にそれぞれ接続することにより、ＣＡＮ通信が可能で
ある（終端抵抗付き端子７はオープン）。FIG. 3 shows a first embodiment of the present invention. 4 is a CAN bus line, CAN-H line 2 and CAN-H line.
A control device connected to L line 3 and at least CP
U5, a CAN communication control driver 6, and a terminating resistor 1 are built-in, and at least CAN-H line connection terminals 8, C
It has an AN-L line connection terminal 9 and a terminal 7 with a terminating resistor, and the terminating resistor 1 is a CAN-H line connecting terminal 8
And terminal 7 with terminal resistance. In FIG. 1, the connection locations of the control device are CAN-H line 2 and CAN
-If the termination of the L line 3 is not the end, that is, if the terminating resistor 1 is unnecessary, the CAN-H line 2 is connected to the CAN-H connection terminal 8.
By connecting the CAN-L line 3 to the CAN-L line connection terminal 9 respectively, CAN communication is possible (the terminal 7 with the terminating resistor is open).
【０００９】本例はＣＰＵ５とＣＡＮドライバ６がそれ
ぞれ単体であるシステムで説明したが、ＣＡＮドライバ
６はＣＰＵ５に内臓しているシステムであってもよい。Although the present embodiment has been described for a system in which the CPU 5 and the CAN driver 6 are each a single unit, the CAN driver 6 may be a system built in the CPU 5.
【００１０】図４は本発明の第二の実施例を示す。４は
ＣＡＮバスラインであるＣＡＮ−Ｈライン２とＣＡＮ−
Ｌライン３に接続される制御装置であり、少なくともCP
U5とＣＡＮ通信制御用ドライバ６と終端抵抗１を内臓し
ており、少なくともＣＡＮ−Ｈライン接続用端子８，Ｃ
ＡＮ−Ｌライン接続用端子９，終端抵抗付き端子７を持
つもので、終端抵抗１はＣＡＮ−Ｈライン接続用端子８
と終端抵抗付き端子７間に接続されている。FIG. 4 shows a second embodiment of the present invention. 4 is a CAN bus line, CAN-H line 2 and CAN-H line.
A control device connected to L line 3 and at least CP
U5, a CAN communication control driver 6, and a terminating resistor 1 are built-in, and at least CAN-H line connection terminals 8, C
It has an AN-L line connection terminal 9 and a terminal 7 with a terminating resistor, and the terminating resistor 1 is a CAN-H line connecting terminal 8
And terminal 7 with terminal resistance.
【００１１】図１において、制御装置の接続場所がＣＡ
Ｎ−Ｈライン２とＣＡＮ−Ｌライン３の終端の場合、つ
まり終端抵抗１が必要な場合、ＣＡＮ−Ｈライン２をＣ
ＡＮ−Ｈライン接続用端子８に、ＣＡＮ−Ｌライン３を
ＣＡＮ−Ｌライン接続用端子９にそれぞれ接続し、終端
抵抗付き端子７とＣＡＮ−Ｌライン３間をハーネス１０
によりショートすることにより、ＣＡＮ−Ｈライン２と
ＣＡＮ−Ｌライン３間に終端抵抗１が接続されるので、
ＣＡＮ通信が可能である。In FIG. 1, the connection point of the control device is CA
In the case where the NH line 2 and the CAN-L line 3 are terminated, that is, when the terminating resistor 1 is required, the CAN-H line 2 is
An AN-H line connection terminal 8 and a CAN-L line 3 are connected to a CAN-L line connection terminal 9, respectively, and a harness 10 is connected between the terminal 7 with a terminal resistor and the CAN-L line 3.
As a result, the terminating resistor 1 is connected between the CAN-H line 2 and the CAN-L line 3.
CAN communication is possible.
【００１２】本例はＣＰＵ５とＣＡＮドライバ６がそれ
ぞれ単体であるシステムで説明したが、ＣＡＮドライバ
６はＣＰＵ５に内臓しているシステムであってもよい。Although the present embodiment has been described for a system in which the CPU 5 and the CAN driver 6 are each a single unit, the CAN driver 6 may be a system built in the CPU 5.
【００１３】図５は本発明の第三の実施例を示す。４は
ＣＡＮバスラインであるＣＡＮ−Ｈライン２とＣＡＮ−
Ｌライン３に接続される制御装置であり、少なくともCP
U5とＣＡＮ通信制御用ドライバ６と終端抵抗１を内臓し
ており、少なくともＣＡＮ−Ｈライン接続用端子８，Ｃ
ＡＮ−Ｌライン接続用端子９，終端抵抗付き端子７を持
つもので、終端抵抗１はＣＡＮ−Ｈライン接続用端子８
と終端抵抗付き端子７間に接続されている。１１は制御
装置の接続場所により、終端抵抗１が不必要な場合の切
替えスイッチである。FIG. 5 shows a third embodiment of the present invention. 4 is a CAN bus line, CAN-H line 2 and CAN-H line.
A control device connected to L line 3 and at least CP
U5, a CAN communication control driver 6, and a terminating resistor 1 are built-in, and at least CAN-H line connection terminals 8, C
It has an AN-L line connection terminal 9 and a terminal 7 with a terminating resistor, and the terminating resistor 1 is a CAN-H line connecting terminal 8
And terminal 7 with terminal resistance. Reference numeral 11 denotes a changeover switch in a case where the terminating resistor 1 is unnecessary depending on the connection location of the control device.
【００１４】図１において、制御装置の接続場所がＣＡ
Ｎ−Ｈライン２とＣＡＮ−Ｌライン３の終端でない場
合、つまり終端抵抗１が不要な場合、終端抵抗付き端子
７とＣＡＮ−Ｌライン３間のスイッチ１１をオープンと
し、ＣＡＮ−Ｈライン２をＣＡＮ−Ｈライン接続用端子
８に、ＣＡＮ−Ｌライン３をＣＡＮ−Ｌ接続用端子９に
接続することにより、ＣＡＮ通信が可能である。In FIG. 1, the connection point of the control device is CA
If the N-H line 2 and the CAN-L line 3 are not terminated, that is, if the terminating resistor 1 is unnecessary, the switch 11 between the terminal 7 with the terminating resistor and the CAN-L line 3 is opened, and the CAN-H line 2 is connected. By connecting the CAN-L line 3 to the CAN-H line connection terminal 8 and the CAN-L line 3 to the CAN-L connection terminal 9, CAN communication is possible.
【００１５】また、図１において、制御装置の接続場所
がＣＡＮ−Ｈライン２とＣＡＮ−Ｌライン３の終端の場
合、つまり終端抵抗１が必要な場合、ＣＡＮ−Ｈライン
２をＣＡＮ−Ｈライン接続用端子８に、ＣＡＮ−Ｌライ
ン３をＣＡＮ−Ｌライン接続用端子９にそれぞれ接続
し、終端抵抗付き端子７とＣＡＮ−Ｌライン３間のスイ
ッチ１１をショートすることにより、ＣＡＮ−Ｈライン
２とＣＡＮ−Ｌライン３間に終端抵抗１が接続されるの
で、ＣＡＮ通信が可能である。In FIG. 1, when the control device is connected at the end of the CAN-H line 2 and the CAN-L line 3, that is, when the terminating resistor 1 is required, the CAN-H line 2 is connected to the CAN-H line. By connecting the CAN-L line 3 to the connection terminal 8 and the CAN-L line connection terminal 9, respectively, and short-circuiting the switch 11 between the terminal 7 with a terminal resistor and the CAN-L line 3, the CAN-H line is connected. Since the terminating resistor 1 is connected between the CAN 2 and the CAN-L line 3, CAN communication is possible.
【００１６】本例はＣＰＵ５とＣＡＮドライバ６がそれ
ぞれ単体であるシステムで説明したが、ＣＡＮドライバ
６はＣＰＵ５に内臓しているシステムであってもよい。Although the present embodiment has been described for a system in which the CPU 5 and the CAN driver 6 are each a single unit, the CAN driver 6 may be a system built in the CPU 5.
【００１７】また、本例は終端抵抗１の不必要の切替え
方法をスイッチを用いて説明したが、これはジャンパピ
ン等を用いた切替えができるものであればよい。In this embodiment, the unnecessary switching method of the terminating resistor 1 has been described using a switch. However, any method can be used as long as it can be switched using a jumper pin or the like.
【００１８】切替えスイッチはハーネスに設定しても、
端子に設定してもどちらでもよく、外部から操作可能で
あれば、制御装置内に設定してもよい。Even if the changeover switch is set to the harness,
Either terminal may be set, or the terminal may be set in the control device if it can be operated from the outside.
【００１９】図６は本発明を実施するためのＣＡＮバス
ラインに接続される制御装置の構成（２）を示す。本制
御装置は少なくともＣＰＵ５とＣＡＮ通信制御用ドライ
バ６と終端抵抗１を内臓しており、少なくともＣＡＮ−
Ｈライン接続用端子８，CAN−Ｌライン接続用端子９，
終端抵抗付き端子１２を持つもので、終端抵抗１はＣＡ
Ｎ−Ｌライン接続用端子９と終端抵抗付き端子１２間に
接続されている。FIG. 6 shows a configuration (2) of a control device connected to a CAN bus line for implementing the present invention. This control device has at least a CPU 5, a CAN communication control driver 6 and a terminating resistor 1, and at least a CAN-controller.
H line connection terminal 8, CAN-L line connection terminal 9,
It has a terminal 12 with a terminating resistor.
It is connected between the NL line connection terminal 9 and the terminal 12 with a terminating resistor.
【００２０】これにより、図１において、制御装置の接
続場所がＣＡＮ−Ｈライン２とCAN−Ｌライン３の終端
であっても、終端でなくても、つまり何処に接続されて
も終端抵抗１の付外しや制御装置の改造無しで、ＣＡＮ
バスラインの接続先を制御装置の端子で切替えることに
より、終端抵抗１の不必要に関わらず一種類の制御装置
で容易にＣＡＮ通信が可能な構成である。Thus, in FIG. 1, the control device is connected to the CAN-H line 2 and the CAN-L line 3 at the terminal end or not at the terminal end. Without removing or modifying control equipment
By switching the connection destination of the bus line by the terminal of the control device, CAN communication can be easily performed by one type of control device regardless of the necessity of the terminating resistor 1.
【００２１】図７は本発明の第四の実施例を示す。４は
ＣＡＮバスラインであるＣＡＮ−Ｈライン２とＣＡＮ−
Ｌライン３に接続される制御装置であり、少なくともCP
U5とＣＡＮ通信制御用ドライバ６と終端抵抗１を内臓し
ており、少なくともＣＡＮ−Ｈライン接続用端子８，Ｃ
ＡＮ−Ｌライン接続用端子９，終端抵抗付き端子１２を
持つもので、終端抵抗１はＣＡＮ−Ｌライン接続用端子
９と終端抵抗付き端子１２間に接続されている。FIG. 7 shows a fourth embodiment of the present invention. 4 is a CAN bus line, CAN-H line 2 and CAN-H line.
A control device connected to L line 3 and at least CP
U5, a CAN communication control driver 6, and a terminating resistor 1 are built-in, and at least CAN-H line connection terminals 8, C
It has an AN-L line connection terminal 9 and a terminal 12 with a terminating resistor. The terminating resistor 1 is connected between the CAN-L line connecting terminal 9 and the terminal 12 with a terminating resistor.
【００２２】図１において、制御装置の接続場所がＣＡ
Ｎ−Ｈライン２とＣＡＮ−Ｌライン３の終端でない場
合、つまり終端抵抗１が不要な場合、ＣＡＮ−Ｈライン
２をＣＡＮ−Ｈ接続用端子８に、ＣＡＮ−Ｌライン３を
ＣＡＮ−Ｌライン接続用端子９にそれぞれ接続すること
により、ＣＡＮ通信が可能である（終端抵抗付き端子１
２はオープン）。In FIG. 1, the control device is connected to CA
When the N-H line 2 and the CAN-L line 3 are not terminated, that is, when the terminating resistor 1 is unnecessary, the CAN-H line 2 is connected to the CAN-H connection terminal 8 and the CAN-L line 3 is connected to the CAN-L line. CAN communication is possible by connecting to each of the connection terminals 9 (the terminal 1 with a terminating resistor).
2 is open).
【００２３】本例はＣＰＵ５とＣＡＮドライバ６がそれ
ぞれ単体であるシステムで説明したが、ＣＡＮドライバ
６はＣＰＵ５に内臓しているシステムであってもよい。In this embodiment, the system in which the CPU 5 and the CAN driver 6 are each a single unit has been described. However, the system in which the CAN driver 6 is built in the CPU 5 may be used.
【００２４】図８は本発明の第五の実施例を示す。４は
ＣＡＮバスラインであるＣＡＮ−Ｈライン２とＣＡＮ−
Ｌライン３に接続される制御装置であり、少なくともCP
U5とＣＡＮ通信制御用ドライバ６と終端抵抗１を内臓し
ており、少なくともＣＡＮ−Ｈライン接続用端子８，Ｃ
ＡＮ−Ｌライン接続用端子９，終端抵抗付き端子１２を
持つもので、終端抵抗１はＣＡＮ−Ｌライン接続用端子
９と終端抵抗付き端子１２間に接続されている。FIG. 8 shows a fifth embodiment of the present invention. 4 is a CAN bus line, CAN-H line 2 and CAN-H line.
A control device connected to L line 3 and at least CP
U5, a CAN communication control driver 6, and a terminating resistor 1 are built-in, and at least CAN-H line connection terminals 8, C
It has an AN-L line connection terminal 9 and a terminal 12 with a terminating resistor. The terminating resistor 1 is connected between the CAN-L line connecting terminal 9 and the terminal 12 with a terminating resistor.
【００２５】図１において、制御装置の接続場所がＣＡ
Ｎ−Ｈライン２とＣＡＮ−Ｌライン３の終端の場合、つ
まり終端抵抗１が必要な場合、ＣＡＮ−Ｈライン２をＣ
ＡＮ−Ｈライン接続用端子８に、ＣＡＮ−Ｌライン３を
ＣＡＮ−Ｌライン接続用端子９にそれぞれ接続し、終端
抵抗付き端子１２とＣＡＮ−Ｈライン２間をハーネス１
３によりショートすることにより、ＣＡＮ−Ｈライン２
とＣＡＮ−Ｌライン３間に終端抵抗１が接続されるの
で、ＣＡＮ通信が可能である。In FIG. 1, the connection point of the control device is CA
In the case where the NH line 2 and the CAN-L line 3 are terminated, that is, when the terminating resistor 1 is required, the CAN-H line 2 is
The AN-H line connection terminal 8 and the CAN-L line 3 are connected to the CAN-L line connection terminal 9, respectively, and the harness 1 is connected between the terminal 12 with terminal resistance and the CAN-H line 2.
3 and the CAN-H line 2
And the CAN-L line 3 is connected with the terminating resistor 1, so that CAN communication is possible.
【００２６】本例はＣＰＵ５とＣＡＮドライバ６がそれ
ぞれ単体であるシステムで説明したが、ＣＡＮドライバ
６はＣＰＵ５に内臓しているシステムであってもよい。Although the present embodiment has been described for a system in which the CPU 5 and the CAN driver 6 are each a single unit, the CAN driver 6 may be a system built in the CPU 5.
【００２７】図９は本発明の第六の実施例を示す。４は
ＣＡＮバスラインであるＣＡＮ−Ｈライン２とＣＡＮ−
Ｌライン３に接続される制御装置であり、少なくともCP
U5とＣＡＮ通信制御用ドライバ６と終端抵抗１を内臓し
ており、少なくともＣＡＮ−Ｈライン接続用端子８，Ｃ
ＡＮ−Ｌライン接続用端子９，終端抵抗付き端子１２を
持つもので、終端抵抗１はＣＡＮ−Ｌライン接続用端子
９と終端抵抗付き端子１２間に接続されている。１４は
制御装置の接続場所により、終端抵抗１が不必要な場合
の切替えスイッチである。FIG. 9 shows a sixth embodiment of the present invention. 4 is a CAN bus line, CAN-H line 2 and CAN-H line.
A control device connected to L line 3 and at least CP
U5, a CAN communication control driver 6, and a terminating resistor 1 are built-in, and at least CAN-H line connection terminals 8, C
It has an AN-L line connection terminal 9 and a terminal 12 with a terminating resistor. The terminating resistor 1 is connected between the CAN-L line connecting terminal 9 and the terminal 12 with a terminating resistor. Reference numeral 14 denotes a changeover switch in a case where the terminating resistor 1 is unnecessary depending on the connection location of the control device.
【００２８】図１において、制御装置の接続場所がＣＡ
Ｎ−Ｈライン２とＣＡＮ−Ｌライン３の終端でない場
合、つまり終端抵抗１が不要な場合、終端抵抗付き端子
１２とＣＡＮ−Ｈライン２間のスイッチ１４をオープン
とし、ＣＡＮ−Ｈライン２をＣＡＮ−Ｈライン接続用端
子８に、ＣＡＮ−Ｌライン３をＣＡＮ−Ｌ接続用端子９
に接続することにより、ＣＡＮ通信が可能である。In FIG. 1, the connection point of the control device is CA
When the N-H line 2 and the CAN-L line 3 are not terminated, that is, when the terminating resistor 1 is unnecessary, the switch 14 between the terminal 12 with the terminating resistor and the CAN-H line 2 is opened, and the CAN-H line 2 is connected. The CAN-L line 3 is connected to the CAN-H line connection terminal 8 by the CAN-L line connection terminal 9.
, Can perform CAN communication.
【００２９】また、図１において、制御装置の接続場所
がＣＡＮ−Ｈライン２とＣＡＮ−Ｌライン３の終端の場
合、つまり終端抵抗１が必要な場合、ＣＡＮ−Ｈライン
２をＣＡＮ−Ｈライン接続用端子８に、ＣＡＮ−Ｌライ
ン３をＣＡＮ−Ｌライン接続用端子９にそれぞれ接続
し、終端抵抗付き端子１２とＣＡＮ−Ｈライン２間のス
イッチ１４をショートすることにより、ＣＡＮ−Ｈライ
ン２とＣＡＮ−Ｌライン３間に終端抵抗１が接続される
ので、ＣＡＮ通信が可能である。In FIG. 1, when the control device is connected at the end of the CAN-H line 2 and the CAN-L line 3, that is, when the terminal resistor 1 is required, the CAN-H line 2 is connected to the CAN-H line. By connecting the CAN-L line 3 to the connection terminal 8 and the CAN-L line connection terminal 9, respectively, and short-circuiting the switch 14 between the terminal 12 with terminal resistance and the CAN-H line 2, the CAN-H line is connected. Since the terminating resistor 1 is connected between the CAN 2 and the CAN-L line 3, CAN communication is possible.
【００３０】本例はＣＰＵ５とＣＡＮドライバ６がそれ
ぞれ単体であるシステムで説明したが、ＣＡＮドライバ
６はＣＰＵ５に内臓しているシステムであってもよい。Although the present embodiment has been described for a system in which the CPU 5 and the CAN driver 6 are each a single unit, the CAN driver 6 may be a system built in the CPU 5.
【００３１】また、本例は終端抵抗１の不必要の切替え
方法をスイッチを用いて説明したが、これはジャンパピ
ン等を用いた切替えができるものであればよい。In this embodiment, the unnecessary switching method of the terminating resistor 1 has been described using a switch. However, any method can be used as long as it can be switched using a jumper pin or the like.
【００３２】切替えスイッチはハーネスに設定しても、
端子に設定してもどちらでもよく、外部から操作可能で
あれば、制御装置内に設定してもよい。Even if the changeover switch is set to the harness,
Either terminal may be set, or the terminal may be set in the control device if it can be operated from the outside.
【００３３】[0033]
【発明の効果】以上述べたごとく、本発明によれば、少
なくともＣＰＵとＣＡＮ通信制御用ドライバと終端抵抗
を内臓しており、少なくともＣＡＮバスである、ＣＡＮ
−Ｈライン接続用端子，ＣＡＮ−Ｌライン接続用端子，
終端抵抗付き端子を持つものであるため、制御装置の接
続場所がＣＡＮバスラインの終端であっても、終端でな
くても、つまり何処に接続されても終端抵抗の付外しや
制御装置の改造無しで、ＣＡＮバスラインの接続先を制
御装置の端子で切替えることにより、終端抵抗の不必要
に関わらず一種類の制御装置でＣＡＮ通信に対応できる
ので、製造コストの低減が図れるという効果がある。As described above, according to the present invention, at least the CPU, the CAN communication control driver, and the terminating resistor are incorporated, and at least the CAN bus is provided.
-H line connection terminal, CAN-L line connection terminal,
Because the terminal has a terminal with a terminating resistor, whether the control device is connected to the end of the CAN bus line or not, that is, wherever it is connected, removing the terminating resistor or modifying the control device By switching the connection destination of the CAN bus line with the terminal of the control device without using the terminal device, one type of control device can cope with the CAN communication regardless of the necessity of the terminating resistor, so that the production cost can be reduced. .
【図１】本発明を実施するためのＣＡＮ通信システム構
成図。FIG. 1 is a configuration diagram of a CAN communication system for implementing the present invention.
【図２】本発明を実施するためのＣＡＮバスラインに接
続される制御装置の構成図。FIG. 2 is a configuration diagram of a control device connected to a CAN bus line for implementing the present invention.
【図３】本発明の第一の実施例を示し、ＣＡＮバスライ
ンに接続される制御装置の構成図。FIG. 3 shows the first embodiment of the present invention, and is a configuration diagram of a control device connected to a CAN bus line.
【図４】本発明の第二の実施例を示し、ＣＡＮバスライ
ンに接続される制御装置の構成図。FIG. 4 shows a second embodiment of the present invention, and is a configuration diagram of a control device connected to a CAN bus line.
【図５】本発明の第三の実施例を示し、ＣＡＮバスライ
ンに接続される制御装置の構成図。FIG. 5 shows a third embodiment of the present invention, and is a configuration diagram of a control device connected to a CAN bus line.
【図６】本発明の第四の実施例を示し、ＣＡＮバスライ
ンに接続される制御装置の構成図。FIG. 6 shows a fourth embodiment of the present invention, and is a configuration diagram of a control device connected to a CAN bus line.
【図７】本発明を実施するためのＣＡＮバスラインに接
続される制御装置の構成図。FIG. 7 is a configuration diagram of a control device connected to a CAN bus line for implementing the present invention.
【図８】本発明の第五の実施例を示し、ＣＡＮバスライ
ンに接続される制御装置の構成図。FIG. 8 shows a fifth embodiment of the present invention, and is a configuration diagram of a control device connected to a CAN bus line.
【図９】本発明の第六の実施例を示し、ＣＡＮバスライ
ンに接続される制御装置の構成図。FIG. 9 shows a sixth embodiment of the present invention, and is a configuration diagram of a control device connected to a CAN bus line.
１…終端抵抗、２…ＣＡＮ−Ｈライン、３…ＣＡＮ−Ｌ
ライン、４…制御装置、５…ＣＰＵ、６…ＣＡＮドライ
バ、７…終端抵抗付き端子、８…ＣＡＮ−Ｈライン接続
用端子、９…ＣＡＮ−Ｌライン接続用端子、１０…ハー
ネス、１１…切替えスイッチ、１２…終端抵抗付き端
子、１３…ハーネス、１４…切替えスイッチ。1: Terminating resistor, 2: CAN-H line, 3: CAN-L
Line 4, control device, 5 CPU, 6 CAN driver, 7 terminal with terminating resistor, 8 terminal for CAN-H line connection, 9 terminal for CAN-L line connection, 10 harness, 11 switching Switch, 12: terminal with terminal resistor, 13: harness, 14: switch.
Claims (21)
本制御装置は少なくともＣＰＵとＣＡＮ通信制御用ドラ
イバとＣＡＮバスラインであるＣＡＮ−Ｈライン接続用
端子，ＣＡＮ−Ｌライン接続用端子を備え、ＣＡＮ−Ｈ
ラインがＣＡＮ−Ｈライン接続用端子に、ＣＡＮ−Ｌラ
インがＣＡＮ−Ｌライン接続用端子にそれぞれ接続され
たＣＡＮ通信システムにおいて、ＣＡＮ通信に必要不可
欠な終端抵抗を制御装置内に設置し、終端抵抗付き端子
を設け、終端抵抗の不必要を制御装置の端子で切替える
ことにより、接続される制御装置がＣＡＮバスラインの
何処に接続されてもＣＡＮ通信が可能であることを特徴
としたＣＡＮ通信システムにおける制御装置。A control device provided with a CAN communication system,
The control device includes at least a CPU, a CAN communication control driver, a CAN bus line connection terminal CAN-H line, and a CAN-L line connection terminal.
In a CAN communication system in which a line is connected to a CAN-H line connection terminal and a CAN-L line is connected to a CAN-L line connection terminal, a terminating resistor indispensable for CAN communication is installed in the control device and terminated. By providing a terminal with a resistor and switching the necessity of the terminating resistor by a terminal of the control device, CAN communication is possible regardless of where the connected control device is connected to the CAN bus line. Control device in the system.
け、終端抵抗の不必要を制御装置の端子で切替えること
により、接続される制御装置がＣＡＮバスラインの何処
に接続されても、終端抵抗の付外しや制御装置の改造変
更無しで、ＣＡＮ通信が可能であることを特徴としたＣ
ＡＮ通信システムにおける制御装置。2. The terminal according to claim 1, wherein a terminal with a terminating resistor is provided, and the necessity of the terminating resistor is switched by a terminal of the control device. C communication characterized by being able to perform CAN communication without removing resistors or modifying control equipment
A control device in an AN communication system.
け、終端抵抗の不必要を制御装置の端子で切替えること
により、同一の制御装置で他のＣＡＮ通信システムにも
対応できることを特徴としたＣＡＮ通信システムにおけ
る制御装置。3. The system according to claim 1, wherein a terminal with a terminating resistor is provided, and the necessity of the terminating resistor is switched by a terminal of the control device, so that the same control device can cope with other CAN communication systems. A control device in a CAN communication system.
本制御装置は少なくともＣＰＵとＣＡＮ通信制御用ドラ
イバとＣＡＮバスラインであるＣＡＮ−Ｈライン接続用
端子，ＣＡＮ−Ｌライン接続用端子を備え、ＣＡＮ−Ｈ
ラインがＣＡＮ−Ｈライン接続用端子に、ＣＡＮ−Ｌラ
インがＣＡＮ−Ｌライン接続用端子にそれぞれ接続され
たＣＡＮ通信システムにおいて、終端抵抗付き端子を設
け、ＣＡＮ通信に必要不可欠な終端抵抗を制御装置内の
ＣＡＮ−Ｈラインと終端抵抗付き端子間に設置すること
で、終端抵抗の不必要をＣＡＮ−Ｈラインと終端抵抗付
き端子間で切替えることにより、接続される制御装置が
ＣＡＮバスラインの何処に接続されてもＣＡＮ通信が可
能であることを特徴としたＣＡＮ通信システムにおける
制御装置。4. A control device provided with a CAN communication system,
The control device includes at least a CPU, a CAN communication control driver, a CAN bus line connection terminal CAN-H line, and a CAN-L line connection terminal.
In a CAN communication system in which the line is connected to the CAN-H line connection terminal and the CAN-L line is connected to the CAN-L line connection terminal, a terminal with a terminating resistor is provided to control the terminating resistor indispensable for CAN communication. By installing the terminal between the CAN-H line and the terminal with a terminating resistor by switching between the CAN-H line and the terminal with the terminating resistor by installing the terminal between the CAN-H line and the terminal with the terminating resistor, A control device in a CAN communication system, characterized in that CAN communication is possible no matter where it is connected.
け、ＣＡＮ通信に必要不可欠な終端抵抗を制御装置内の
ＣＡＮ−Ｈラインと終端抵抗付き端子間に設置すること
で、接続される制御装置がＣＡＮバスラインの何処に接
続されても、終端抵抗の付外しや制御装置の改造変更無
しで、ＣＡＮ通信が可能であることを特徴としたCAN通
信システムにおける制御装置。5. The control system according to claim 4, wherein a terminal with a terminating resistor is provided, and a terminating resistor indispensable for CAN communication is installed between the CAN-H line in the control device and the terminal with the terminating resistor. What is claimed is: 1. A control device in a CAN communication system, wherein CAN communication is possible regardless of where the device is connected to a CAN bus line, without removing a terminating resistor or modifying the control device.
け、ＣＡＮ通信に必要不可欠な終端抵抗を制御装置内の
ＣＡＮ−Ｈラインと終端抵抗付き端子間に設置すること
で、終端抵抗の不必要を制御装置の端子で切替えること
により、同一の制御装置で他のＣＡＮ通信システムにも
対応できることを特徴としたＣＡＮ通信システムにおけ
る制御装置。6. The terminal according to claim 4, wherein a terminal with a terminating resistor is provided, and a terminating resistor indispensable for CAN communication is installed between the CAN-H line in the control device and the terminal with the terminating resistor. A control device in a CAN communication system characterized in that the same control device can cope with other CAN communication systems by switching the necessity by a terminal of the control device.
端抵抗が不要な場合は、終端抵抗付き端子をオープンと
することにより、ＣＡＮ通信が可能であることを特徴と
したＣＡＮ通信システムにおける制御装置。7. The control in a CAN communication system according to claim 4, wherein when the terminating resistor is not required, the terminal with the terminating resistor is opened so that CAN communication is possible. apparatus.
端抵抗が必要な場合は、終端抵抗付き端子とＣＡＮ−Ｌ
端子をハーネスでショートさせることにより、ＣＡＮ通
信が可能であることを特徴としたＣＡＮ通信システムに
おける制御装置。8. In the switching of the terminating resistor according to claim 4, when a terminating resistor is required, a terminal with a terminating resistor and a CAN-L are connected.
A control device in a CAN communication system, wherein CAN communication is possible by shorting a terminal with a harness.
端抵抗付き端子とＣＡＮ−Ｌ端子間にスイッチを設け、
終端抵抗が不要な場合は、本スイッチをオープンとする
ことにより、ＣＡＮ通信が可能であることを特徴とした
ＣＡＮ通信システムにおける制御装置。9. The switching of a terminating resistor according to claim 4, wherein a switch is provided between the terminal with the terminating resistor and the CAN-L terminal.
A control device in a CAN communication system, wherein CAN communication is possible by opening this switch when a terminating resistor is not required.
終端抵抗付き端子とＣＡＮ−Ｌ端子間にスイッチを設
け、終端抵抗が必要な場合は、本スイッチをショートす
ることにより、ＣＡＮ通信が可能であることを特徴とし
たＣＡＮ通信システムにおける制御装置。10. The switching of the terminating resistor according to claim 4,
A control device in a CAN communication system, characterized in that a switch is provided between a terminal with a terminating resistor and a CAN-L terminal, and when a terminating resistor is required, the switch is short-circuited to enable CAN communication.
終端抵抗付き端子とＣＡＮ−Ｌ端子間にジャンパピンを
設け、終端抵抗が不要な場合は、本ジャンパピンをオー
プンとすることにより、ＣＡＮ通信が可能であることを
特徴としたＣＡＮ通信システムにおける制御装置。11. The switching of the terminating resistor according to claim 4,
A jumper pin is provided between a terminal with a terminating resistor and a CAN-L terminal, and when a terminating resistor is not required, by opening this jumper pin, CAN communication is possible. apparatus.
終端抵抗付き端子とＣＡＮ−Ｌ端子間にジャンパピンを
設け、終端抵抗が必要な場合は、本ジャンパピンをショ
ートすることにより、ＣＡＮ通信が可能であることを特
徴としたＣＡＮ通信システムにおける制御装置。12. The switching of the terminating resistor according to claim 4,
A control device in a CAN communication system, characterized in that a jumper pin is provided between a terminal with a terminating resistor and a CAN-L terminal, and when a terminating resistor is required, the jumper pin is short-circuited to enable CAN communication. .
で、本制御装置は少なくともＣＰＵとＣＡＮ通信制御用
ドライバとＣＡＮバスラインであるＣＡＮ−Ｈライン接
続用端子，ＣＡＮ−Ｌライン接続用端子を備え、ＣＡＮ
−ＨラインがＣＡＮ−Ｈライン接続用端子に、ＣＡＮ−
ＬラインがＣＡＮ−Ｌライン接続用端子にそれぞれ接続
されたＣＡＮ通信システムにおいて、終端抵抗付き端子
を設け、ＣＡＮ通信に必要不可欠な終端抵抗を制御装置
内のＣＡＮ−Ｌラインと終端抵抗付き端子間に設置する
ことで、終端抵抗の不必要をＣＡＮ−Ｌラインと終端抵
抗付き端子間で切替えることにより、接続される制御装
置がＣＡＮバスラインの何処に接続されてもＣＡＮ通信
が可能であることを特徴としたＣＡＮ通信システムにお
ける制御装置。13. A control device provided with a CAN communication system, comprising at least a CPU, a CAN communication control driver, a CAN bus line connection terminal CAN-H line, and a CAN-L line connection terminal. , CAN
-H line is connected to the CAN-H line connection terminal,
In a CAN communication system in which an L line is connected to a CAN-L line connection terminal, a terminal with a terminating resistor is provided, and a terminating resistor indispensable for CAN communication is connected between the CAN-L line in the control device and the terminal with a terminating resistor. By switching the unnecessary terminal resistor between the CAN-L line and the terminal with terminal resistor, CAN communication is possible regardless of where the connected control device is connected to the CAN bus line. A control device in a CAN communication system, characterized in that:
を設け、ＣＡＮ通信に必要不可欠な終端抵抗を制御装置
内のＣＡＮ−Ｌラインと終端抵抗付き端子間に設置する
ことで、接続される制御装置がＣＡＮバスラインの何処
に接続されても、終端抵抗の付外しや制御装置の改造変
更無しで、ＣＡＮ通信が可能であることを特徴としたＣ
ＡＮ通信システムにおける制御装置。14. A control system according to claim 13, wherein a terminal with a terminating resistor is provided, and a terminating resistor indispensable for CAN communication is provided between the CAN-L line in the control device and the terminal with the terminating resistor. No matter where the device is connected to the CAN bus line, CAN communication is possible without removing the terminating resistor or modifying the control device.
A control device in an AN communication system.
を設け、ＣＡＮ通信に必要不可欠な終端抵抗を制御装置
内のＣＡＮ−Ｌラインと終端抵抗付き端子間に設置する
ことで、終端抵抗の不必要を制御装置の端子で切替える
ことにより、同一の制御装置で他のＣＡＮ通信システム
にも対応できることを特徴としたＣＡＮ通信システムに
おける制御装置。15. A terminal according to claim 13, wherein a terminal with a terminating resistor is provided, and a terminating resistor indispensable for CAN communication is provided between the CAN-L line in the control device and the terminal with a terminating resistor. A control device in a CAN communication system characterized in that the same control device can cope with other CAN communication systems by switching the necessity by a terminal of the control device.
て、終端抵抗が不要な場合は、終端抵抗付き端子をオー
プンとすることにより、ＣＡＮ通信が可能であることを
特徴としたＣＡＮ通信システムにおける制御装置。16. A control method in a CAN communication system according to claim 13, wherein when the terminating resistor is not required, the terminal with the terminating resistor is opened so that CAN communication is possible. apparatus.
て、終端抵抗が必要な場合は、終端抵抗付き端子とＣＡ
Ｎ−Ｈ端子をハーネスでショートさせることにより、Ｃ
ＡＮ通信が可能であることを特徴としたＣＡＮ通信シス
テムにおける制御装置。17. In the switching of the terminating resistor according to claim 13, if a terminating resistor is required, a terminal with a terminating resistor and a CA
By shorting the NH terminal with a harness, C
A control device in a CAN communication system, which is capable of performing AN communication.
て、終端抵抗付き端子とＣＡＮ−Ｈ端子間にスイッチを
設け、終端抵抗が不要な場合は、本スイッチをオープン
とすることにより、ＣＡＮ通信が可能であることを特徴
としたＣＡＮ通信システムにおける制御装置。In the switching of the terminating resistor according to the thirteenth aspect, a switch is provided between the terminal with the terminating resistor and the CAN-H terminal, and when the terminating resistor is not required, this switch is opened to enable CAN communication. A control device in a CAN communication system, characterized in that it is possible.
て、終端抵抗付き端子とＣＡＮ−Ｈ端子間にスイッチを
設け、終端抵抗が必要な場合は、本スイッチをショート
することにより、ＣＡＮ通信が可能であることを特徴と
したＣＡＮ通信システムにおける制御装置。19. In the switching of the terminating resistor according to claim 13, a switch is provided between the terminal with the terminating resistor and the CAN-H terminal, and when the terminating resistor is required, the switch is short-circuited to enable CAN communication. A control device in a CAN communication system, characterized in that:
て、終端抵抗付き端子とＣＡＮ−Ｈ端子間にジャンパピ
ンを設け、終端抵抗が不要な場合は、本ジャンパピンを
オープンとすることにより、ＣＡＮ通信が可能であるこ
とを特徴としたＣＡＮ通信システムにおける制御装置。20. In the switching of the terminating resistor according to claim 13, a jumper pin is provided between the terminal with the terminating resistor and the CAN-H terminal, and when the terminating resistor is not required, the jumper pin is opened to open the CAN. A control device in a CAN communication system, wherein communication is possible.
て、終端抵抗付き端子とＣＡＮ−Ｈ端子間にジャンパピ
ンを設け、終端抵抗が必要な場合は、本ジャンパピンを
ショートすることにより、ＣＡＮ通信が可能であること
を特徴としたＣＡＮ通信システムにおける制御装置。21. In the switching of the terminating resistor according to claim 13, a jumper pin is provided between the terminal with the terminating resistor and the CAN-H terminal, and when the terminating resistor is required, the jumper pin is short-circuited to enable CAN communication. A control device in a CAN communication system, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10338801A JP2000165415A (en) | 1998-11-30 | 1998-11-30 | Controller in can communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10338801A JP2000165415A (en) | 1998-11-30 | 1998-11-30 | Controller in can communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000165415A true JP2000165415A (en) | 2000-06-16 |
Family
ID=18321609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10338801A Pending JP2000165415A (en) | 1998-11-30 | 1998-11-30 | Controller in can communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000165415A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100379036B1 (en) * | 2000-12-14 | 2003-04-08 | 현대자동차주식회사 | Can communication system having a outer terminating resistor |
| KR20030060581A (en) * | 2002-01-10 | 2003-07-16 | 주식회사 현대오토넷 | Can communication system in comercial bus |
| JP2004231048A (en) * | 2003-01-30 | 2004-08-19 | Exon Science Inc | Control module for adjusting visibility angle of vehicle mirror |
| US7349479B2 (en) | 2002-04-10 | 2008-03-25 | Denso Corporation | Communications system of two-wire line enhancing fail-safe performance |
| US7627707B2 (en) | 2006-11-10 | 2009-12-01 | Olympus Corporation | Microscope system and extension unit |
| JP2013232763A (en) * | 2012-04-27 | 2013-11-14 | Panasonic Corp | Branching unit for two-wire signal line and intercom system for multiple dwelling house |
| JP2014208525A (en) * | 2013-03-25 | 2014-11-06 | コベルコクレーン株式会社 | Can communication system for construction machine |
| EP2829989A1 (en) | 2013-07-26 | 2015-01-28 | Sanyo Denki Co., Ltd. | Device for connecting a termination resistance |
| JP2019083471A (en) * | 2017-10-31 | 2019-05-30 | 株式会社リコー | Communication device, restoration method, restoration program, and image forming apparatus |
-
1998
- 1998-11-30 JP JP10338801A patent/JP2000165415A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100379036B1 (en) * | 2000-12-14 | 2003-04-08 | 현대자동차주식회사 | Can communication system having a outer terminating resistor |
| KR20030060581A (en) * | 2002-01-10 | 2003-07-16 | 주식회사 현대오토넷 | Can communication system in comercial bus |
| US7349479B2 (en) | 2002-04-10 | 2008-03-25 | Denso Corporation | Communications system of two-wire line enhancing fail-safe performance |
| JP2004231048A (en) * | 2003-01-30 | 2004-08-19 | Exon Science Inc | Control module for adjusting visibility angle of vehicle mirror |
| US7627707B2 (en) | 2006-11-10 | 2009-12-01 | Olympus Corporation | Microscope system and extension unit |
| JP2013232763A (en) * | 2012-04-27 | 2013-11-14 | Panasonic Corp | Branching unit for two-wire signal line and intercom system for multiple dwelling house |
| JP2014208525A (en) * | 2013-03-25 | 2014-11-06 | コベルコクレーン株式会社 | Can communication system for construction machine |
| EP2829989A1 (en) | 2013-07-26 | 2015-01-28 | Sanyo Denki Co., Ltd. | Device for connecting a termination resistance |
| JP2019083471A (en) * | 2017-10-31 | 2019-05-30 | 株式会社リコー | Communication device, restoration method, restoration program, and image forming apparatus |
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