JP2789634B2 - Alarm detection method for loop type data transmission equipment - Google Patents
Alarm detection method for loop type data transmission equipmentInfo
- Publication number
- JP2789634B2 JP2789634B2 JP1011883A JP1188389A JP2789634B2 JP 2789634 B2 JP2789634 B2 JP 2789634B2 JP 1011883 A JP1011883 A JP 1011883A JP 1188389 A JP1188389 A JP 1188389A JP 2789634 B2 JP2789634 B2 JP 2789634B2
- Authority
- JP
- Japan
- Prior art keywords
- alarm detection
- master station
- station
- slave
- bit
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ループ式データ伝送装置において、通信異
常の警報検出を行なう方式に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a communication abnormality alarm in a loop type data transmission device.
ループ式データ伝送装置は、親局と複数の子局とを伝
送路によりループ状に接続し、親局から各子局に対し一
定方向へデータの送信を行なうと共に、各子局相互間お
よび各子局と親局との間においても同様にデータの送受
信を行なうものとなつており、親局が各子局へデータを
送信する際には、警報検出用ビツトを「０」として送信
し、これを正常に受信した子局では、警報検出用ビツト
を「１」へセツトしてつぎの子局へ送信し、伝送路を一
巡して到来する警報検出用ビツトを受信した親局におい
ては、同ビツトが「１」のとき通信状態正常、「０」で
あれば通信異常と判断し、これにより警報の検出を行な
うものとなつている。A loop-type data transmission device connects a master station and a plurality of slave stations in a loop by a transmission path, transmits data from the master station to each slave station in a fixed direction, and transmits data between the slave stations and between each slave station. Similarly, data is transmitted and received between the slave station and the master station. When the master station transmits data to each slave station, the alarm detection bit is transmitted as "0", In the slave station that has received this normally, the alarm detection bit is set to "1" and transmitted to the next slave station, and in the master station that has received the alarm detection bit arriving around the transmission path, When the bit is "1", it is determined that the communication state is normal, and when the bit is "0", it is determined that the communication is abnormal, thereby detecting an alarm.
しかし、従来においては、いずれかの子局が正常な受
信を行なわずとも、他の子局が正常な受信を行なえば、
警報検出用ビツトが「１」となつており、親局において
正確に通信異常の警報検出を行なうことのできない欠点
を生じている。However, conventionally, even if one of the slave stations does not perform normal reception, if another slave station performs normal reception,
Since the alarm detection bit is "1", there is a disadvantage that the master station cannot accurately detect the alarm of the communication abnormality.
前述の課題を解決するため、本発明はつぎの手段によ
り構成するものとなつている。In order to solve the above-mentioned problem, the present invention is constituted by the following means.
すなわち、上述のループ式データ伝送装置において、
親局からデータの送信を行なう際に警報検出用ビツトを
零として送信し、各子局においては受信データのフレー
ムチェックシーケンス部をチェックした結果，受信状態
が正常であれば、警報検出用ビツトへ特定数を各個に加
算して送信し、これを受信した親局においては、同ビツ
トの示す値が特定数と全子局数との積に等しくないとき
通信異常の警報検出を行なうものとしている。That is, in the above-described loop data transmission device,
When data is transmitted from the master station, the alarm detection bit is set to zero, and each slave station checks the frame check sequence part of the received data. A specific number is added to each individual and transmitted, and the master station receiving the signal detects a communication abnormality alarm when the value indicated by the bit is not equal to the product of the specific number and the total number of child stations. .
したがつて、全子局の受信状態が正常であれば、特定
数をｎ、全子局数をＮとしたとき、親局の受信する警報
検出用ビツトはｎ・Ｎとなつているのに対し、いずれか
の子局において受信状態が異常となつたとき、同ビツト
の示す値がｎ・Ｎとならず、正確に通信異常の警報検出
を行なうことができる。Therefore, if the reception status of all the slave stations is normal, the alarm detection bits received by the master station are n · N when the specific number is n and the number of all the slave stations is N. On the other hand, when the reception state becomes abnormal in any of the slave stations, the value indicated by the bit does not become n · N, and the alarm of the communication abnormality can be accurately detected.
以下、実施例を示す図によつて本発明の詳細を説明す
る。Hereinafter, the present invention will be described in detail with reference to the drawings showing examples.
第１図は全構成のブロツク図であり、親局MSと複数の
子局SS1〜SSNとが伝送路l1、l2によりループ状に接続さ
れ、伝送路l1は反時計方向、伝送路l2は時計方向に各々
伝送を行なうものとなつており、この場合は伝送路l1が
現用、伝送路l2が予備となっている。Figure 1 is a block diagram of the whole configuration, the master station MS and a plurality of slave stations SS 1 ~ SS N are connected in a loop by transmission lines l 1, l 2, the transmission line l 1 is the counterclockwise direction, transmission line l 2 is summer and performs each transfer in a clockwise direction, the transmission line l 1 in this case is working, the transmission line l 2 is in the spare.
また、親局MSが各子局SS1〜SSNに対してデータを送信
する際には、両伝送路l1、l2へ送信を行なうが、各子局
SS1〜SSNでは伝送路l1よりのデータのみを受信してつぎ
の子局へ送信するのに対し、伝送路l2よりのデータは、
正常時においては中継送信のみを行なうものとなつてい
る。Further, when the master station MS transmits data to the slave station SS 1 ~ SS N performs transmission to both the transmission line l 1, l 2, but each slave station
In SS 1 to SS N , only data from the transmission line l 1 is received and transmitted to the next slave station, whereas data from the transmission line l 2 is
Normally, only relay transmission is performed.
こゝにおいて、親局MSが各子局SSr1〜SSNへデータを
送信する際、警報検出用ビツトとしてデータの上り下り
を表わすU/Dビツトを用い、これを０にして送信するも
のとなつており、これを正常に受信した子局SS1では、
同ビツトへ特定数として１を加算のうえ、子局SS2へ送
信し、これを同様に受信した子局SS2においては、同ビ
ツトへ１を更に加算し、これを２としてつぎの子局SS3
へ送信し、データが正常に受信できる限り、以降の子局
SS3〜SSNにおいても各個に１を同ビツトへ加算して送信
するものとなつている。In thisゝ, when the master station MS transmits data to the slave station SSr 1 ~ SS N, to those using the U / D bit representing the uplink and downlink data as an alarm detection bits, which are transmitted to the 0 In the child station SS 1 that has received this normally,
Upon addition of 1 as a specific number to the bits, and transmitted to the slave station SS 2, in the slave station SS 2 which received the same manner, further adds 1 to the bit, the next slave station so as 2 SS 3
To the subsequent slave stations as long as data can be received normally.
And a 1 to each individual in summer as to transmit by adding to the same bit even SS 3 ~ SS N.
したがつて、子局SSNからの送信では、同ビツトがＮ
を示すものとなつており、これを受信した親局MSにおい
ては、U/Dビツトの示す値がＮであれば全子局数Ｎと特
定数１との積に等しく、全子局SS1〜SSNの受信状態が正
常であると判断し、同ビツトの示す値がＮ以外のときに
は、いずれかの子局において受信状態が異常になつたと
判断し、これにより通信異常の警報検出を行なう。It was, but go-between, the transmission from the slave station SS N, the same bit is N
If the value indicated by the U / D bit is N, the master station MS that has received this signal is equal to the product of the total number of slave stations N and the specific number 1, and all the slave stations SS 1 determines the reception state of the ~ SS N is normal, if the value indicated by the same bit is other than N may be any received at the slave station state is judged that summer abnormal, thereby performing communication abnormality alarm detection.
第２図は、親局MSおよび各子局SS1〜SSNの構成を示す
ブロック図であり、バイパス制御部（以下、BPC）１
は、伝送路l1、l2を収容し、正常時は受信側の伝送路l
1Rよりの信号を同期制御部（以下、SYC）２へ与える一
方、送受信部（下、SRD）３の出力を送信側の伝送路l1S
へ送出すると共に、受信側の伝送路l2Rからの信号をそ
のまゝ送信側の伝送路l2Sへ中継送信するものとなつて
いるが、障害発生時の障害部位探索および障害対策にお
いては、伝送路l1Rとl2Sとの、または、伝送路l2Rとl1S
との折返し接続を行なう。Figure 2 is a block diagram showing the configuration of a master station MS and each slave station SS 1 ~ SS N, bypass control unit (hereinafter, BPC) 1
Accommodates the transmission lines l 1 and l 2 , and when normal, the transmission line l on the receiving side
While the signal from 1R is supplied to a synchronization control unit (hereinafter, SYC) 2, the output of a transmission / reception unit (lower, SRD) 3 is transmitted to a transmission line l 1S on the transmission side.
Sends out to, but the signal from the transmission line l 2R of the receiving Sonomaゝand summer to that relays transmission to the transmission line l 2S on the transmitting side, the fault location search and fault tolerance in the event of a failure, the Transmission line l 1R and l 2S or transmission line l 2R and l 1S
Make a loopback connection with.
また、SYC2を介する受信データは、SRD3において、受
信データ中のフレームチエツクシーケンス部がチエツク
され、これが正常であればインターフエイス（以下、I/
F）４を介して端末装置（以下、TE）へ送出される一
方、TEからの送信データは、SRD3においてフレームの構
成がなされ、U/Dビツト挿入部（以下、BIS）５において
更にU/Dビツトが付加されたうえ、BPC1を介して伝送路l
1Sで送信される。In the received data via the SYC2, the frame check sequence portion in the received data is checked in the SRD3, and if this is normal, the interface (hereinafter, I / O) is checked.
F) While being transmitted to a terminal device (hereinafter referred to as TE) via 4), the transmission data from the TE is structured in a frame in SRD3, and further transmitted in U / D bit insertion unit (hereinafter referred to as BIS) 5 in U / D. The D bit is added and the transmission path is
Sent in 1S .
たゞし、SYC2およびBIS5は、親局MSにのみ設けてあ
り、SYC2が全般的な監視および伝送遅延時間の補正等を
行なう一方、各子局SS1〜SSNでは、加算回路（以下、AD
D）６が付加されており、SRD3が受信データのフレーム
チエツクシーケンス部をチエツクした結果、これが正常
であれば、TEからの送信データへ付加するU/Dビツトが
受信時に示す値へADD6が１を加算し、BPC1を介して送信
するものとなつている。Was Isuzu, and the SYC2 and BIS5, is provided with only the parent station MS, while SYC2 performs correction or the like of the general monitoring and transmission delay time, in each slave station SS 1 ~ SS N, adding circuit (hereinafter, AD
D) 6 is added, and as a result of SRD3 checking the frame check sequence part of the received data, if this is normal, the ADD6 is added to the value indicated by the U / D bit added to the transmission data from the TE at the time of reception. Is added and transmitted via BPC1.
また、親局MSにおいては、SYC2、BIS5のほかに、警報
検出部（以下、ALD）７が設けてあり、BPC1を介する受
信データ中のU/Dビツトをチエツクし、これの示す値が
Ｎ、すなわち、特定数と全子局数との積に等しいか否か
を判断しており、Ｎでなければ通信異常の警報検出を行
ない、ALD7よりSYC2へこれを示す信号を送出し、更に、
SYC2からBPC1へ制御信号CBを送出させ、これにより障害
対策を各子局SS1〜SSNへ指令するものとなつている。In the master station MS, an alarm detection unit (hereinafter, ALD) 7 is provided in addition to SYC2 and BIS5. The U / D bit in the received data via BPC1 is checked, and the value indicated by this is N. That is, it is determined whether or not it is equal to the product of the specific number and the total number of slave stations. If it is not N, a communication abnormality alarm is detected, and a signal indicating this is sent from ALD7 to SYC2.
SYC2 BPC1 is sent a control signal CB to the thereby have summer and those which direct fault tolerance to each slave station SS 1 ~ SS N.
以上の説明により明らかなとおり本発明によれば、親
局からデータの送信を行なう際、警報検出用ビツトを零
として送信する一方、各子局においては、これを正常に
受信したとき同ビツトへ特定数を各個に加算して送信
し、これを受信した親局では同ビツトの示す値が特定数
と全子局数との積に等しくないとき、通信異常の警報検
出を行なうものとしたゝめ、各子局の異常を正確に検出
できるものとなり、各種用途のループ式データ伝送装置
において顕著な効果が得られる。As is apparent from the above description, according to the present invention, when data is transmitted from the master station, the alarm detection bit is transmitted as zero, while each slave station transmits the same bit when receiving it normally. A specific number is added to each individual and transmitted. When the value indicated by the bit is not equal to the product of the specific number and the total number of the slave stations, the master station that has received the signal detects an abnormal communication alarm. Therefore, abnormality of each slave station can be accurately detected, and a remarkable effect can be obtained in a loop-type data transmission device for various uses.
【図面の簡単な説明】 図は本発明の実施例を示し、第１図は全構成のブロツク
図、第２図は親局および各子局の構成を示すブロツク図
である。 ２……同期制御部、３……送受信部、５……U/Dビツト
挿入部、６……加算回路、７……警報検出部、MS……親
局、SS1〜SSN……子局、l1、l2……伝送路。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram showing the entire configuration, and FIG. 2 is a block diagram showing the configurations of a master station and each slave station. 2 ...... synchronization control unit, 3 ...... transceiver, 5 ...... U / D bit insertion unit, 6 ...... addition circuit, 7 ...... alarm detector, MS ...... master station, SS 1 ~ SS N ...... Child Stations, l 1 , l 2 … transmission line.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−280942（ＪＰ，Ａ) 特開 平１−129549（ＪＰ，Ａ) 特開 平１−115238（ＪＰ，Ａ) 特開 昭61−224750（ＪＰ，Ａ) 特開 昭60−59837（ＪＰ，Ａ) 特開 昭58−30254（ＪＰ，Ａ) 特開 昭57−178447（ＪＰ，Ａ) 特公 昭59−43862（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) H04L 12/42 - 12/437 ＪＩＣＳＴファイル（ＪＯＩＳ)──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-280942 (JP, A) JP-A-1-129549 (JP, A) JP-A-1-115238 (JP, A) JP-A-61-1986 224750 (JP, A) JP-A-60-59837 (JP, A) JP-A-58-30254 (JP, A) JP-A-57-178447 (JP, A) JP-B-59-43862 (JP, B2) (58) Fields surveyed (Int.Cl. 6 , DB name) H04L 12/42-12/437 JICST file (JOIS)
Claims (1)
状に接続し、前記親局から各子局に対し一定方向へデー
タの送信を行なうループ式データ伝送装置において、 前記親局からデータの送信を行なう際に警報検出用ビッ
トを零として送信し、前記各子局においては受信データ
のフレームチェックシーケンス部をチェックした結果、
受信状態が正常であれば、前記警報検出用ビットへ特定
数を各個に加算して送信し、該送信を受信した前記親局
では前記警報検出用ビットの示す値が前記特定数と全子
局数との積に等しくないとき通信異常の警報検出を行な
うことを特徴とするループ式データ伝送装置の警報検出
方式。1. A loop-type data transmission device for connecting a master station and a plurality of slave stations in a loop by a transmission path and transmitting data from the master station to each slave station in a fixed direction. When transmitting data from, the alarm detection bit is transmitted as zero, and in each of the slave stations, as a result of checking the frame check sequence part of the received data,
If the reception state is normal, a specific number is added to each of the alarm detection bits and transmitted, and at the master station that has received the transmission, the value indicated by the alarm detection bits indicates the specific number and all child stations. An alarm detection method for a loop-type data transmission device, wherein a communication abnormality alarm is detected when the number is not equal to the product of the numbers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1011883A JP2789634B2 (en) | 1989-01-23 | 1989-01-23 | Alarm detection method for loop type data transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1011883A JP2789634B2 (en) | 1989-01-23 | 1989-01-23 | Alarm detection method for loop type data transmission equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02193433A JPH02193433A (en) | 1990-07-31 |
| JP2789634B2 true JP2789634B2 (en) | 1998-08-20 |
Family
ID=11790126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1011883A Expired - Lifetime JP2789634B2 (en) | 1989-01-23 | 1989-01-23 | Alarm detection method for loop type data transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2789634B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57178447A (en) * | 1981-04-27 | 1982-11-02 | Nec Corp | Loop data transmission system |
| JPS5943862A (en) * | 1982-09-03 | 1984-03-12 | Kanou Shoji Kk | Wire bar and its production |
| JPH01280942A (en) * | 1988-05-06 | 1989-11-13 | Nec Corp | Unidirectional global communication control system |
-
1989
- 1989-01-23 JP JP1011883A patent/JP2789634B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02193433A (en) | 1990-07-31 |
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