JPS54110706A - Data terminal device - Google Patents
Data terminal deviceInfo
- Publication number
- JPS54110706A JPS54110706A JP1761978A JP1761978A JPS54110706A JP S54110706 A JPS54110706 A JP S54110706A JP 1761978 A JP1761978 A JP 1761978A JP 1761978 A JP1761978 A JP 1761978A JP S54110706 A JPS54110706 A JP S54110706A
- Authority
- JP
- Japan
- Prior art keywords
- communication
- circuit
- terminal device
- central device
- transmits
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 abstract 3
- 230000002159 abnormal effect Effects 0.000 abstract 2
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Abstract
PURPOSE: To secure the automatic transmission again for the data to the central device and thus to start the communication operation without ending the communication in case the normal communication is lost for the data terminal device of automatic control with the central device.
CONSTITUTION: In case the error is detected in the answerinformation given from the central device even after counting of the fixed times, communication state decision part 18 judges the abnormal communication state and informs the abnormal state to control circuit 11. Circuit 11 transmits the contents memorized temporarily in request information memory part 9 newly from transmission circuit 10 via data line L1. Thus, the request information is transmitted to central device 1 from circuit 10. Device 1 has the similar operation to that of the previous time and produces the answer information to transmit it to terminal device 5 from transmission circuit 4 via data line L2. When no error is detected in the answer information, device 5 transmits the ACK code to device 1 as the answer signal to complete the communication.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1761978A JPS54110706A (en) | 1978-02-20 | 1978-02-20 | Data terminal device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1761978A JPS54110706A (en) | 1978-02-20 | 1978-02-20 | Data terminal device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54110706A true JPS54110706A (en) | 1979-08-30 |
JPS5759972B2 JPS5759972B2 (en) | 1982-12-17 |
Family
ID=11948884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1761978A Granted JPS54110706A (en) | 1978-02-20 | 1978-02-20 | Data terminal device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54110706A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0548676A (en) * | 1991-12-18 | 1993-02-26 | Hitachi Ltd | Data transmission system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59153978A (en) * | 1983-02-18 | 1984-09-01 | Toyota Motor Corp | Control method of ignition timing in knock controlled engine |
-
1978
- 1978-02-20 JP JP1761978A patent/JPS54110706A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0548676A (en) * | 1991-12-18 | 1993-02-26 | Hitachi Ltd | Data transmission system |
Also Published As
Publication number | Publication date |
---|---|
JPS5759972B2 (en) | 1982-12-17 |
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