JPS55124827A - Failure discrimination system for data transmission system - Google Patents
Failure discrimination system for data transmission systemInfo
- Publication number
- JPS55124827A JPS55124827A JP3354879A JP3354879A JPS55124827A JP S55124827 A JPS55124827 A JP S55124827A JP 3354879 A JP3354879 A JP 3354879A JP 3354879 A JP3354879 A JP 3354879A JP S55124827 A JPS55124827 A JP S55124827A
- Authority
- JP
- Japan
- Prior art keywords
- receiver
- driver
- test signal
- data transmission
- ram202
- 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.)
- Pending
Links
Landscapes
- Small-Scale Networks (AREA)
Abstract
PURPOSE: To discriminate the failure of driver when the test signal and the signal introduced from the second receiver are not in agreement, by preparing the second receiver as the receiver to driver and comparing the test signal given to the driver with the signal introduced from the second receiver.
CONSTITUTION: At first, the contact of the relay 210 connects the driver 11 and the second receiver 30. CPU20 compares the test signal given to the driver 11 with the test signal from the receiver 30. If not in agreement, whether or not the machine number is set to RAM202 is discriminated, but if in agreement, the control signal d is "L". Thus, Tr27 is conductive, the contact of the relay 210 is selected to the first receiver 12, and the second receiver 30 is made inactive. CPU20 sets the machine number to RAM202. Further, CPU20 discriminates whether or not the machine number is set to RAM202, and if not set, it is processed as error.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3354879A JPS55124827A (en) | 1979-03-22 | 1979-03-22 | Failure discrimination system for data transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3354879A JPS55124827A (en) | 1979-03-22 | 1979-03-22 | Failure discrimination system for data transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55124827A true JPS55124827A (en) | 1980-09-26 |
Family
ID=12389604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3354879A Pending JPS55124827A (en) | 1979-03-22 | 1979-03-22 | Failure discrimination system for data transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55124827A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58103250A (en) * | 1981-12-15 | 1983-06-20 | Nec Corp | Data communication controller |
JPS58146919A (en) * | 1982-02-24 | 1983-09-01 | Mitsubishi Electric Corp | Output circuit |
JPS5912657A (en) * | 1982-07-13 | 1984-01-23 | Meidensha Electric Mfg Co Ltd | Transmission line protecting system of multidrop type information transmission system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50137637A (en) * | 1974-04-19 | 1975-10-31 | ||
JPS5179521A (en) * | 1975-01-08 | 1976-07-10 | Hitachi Ltd | |
JPS51112229A (en) * | 1975-03-28 | 1976-10-04 | Hitachi Ltd | Power lamp lighting system of terminal processor |
JPS5217733A (en) * | 1975-07-31 | 1977-02-09 | Fujitsu Ltd | Transmission system with interface connection test function |
-
1979
- 1979-03-22 JP JP3354879A patent/JPS55124827A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50137637A (en) * | 1974-04-19 | 1975-10-31 | ||
JPS5179521A (en) * | 1975-01-08 | 1976-07-10 | Hitachi Ltd | |
JPS51112229A (en) * | 1975-03-28 | 1976-10-04 | Hitachi Ltd | Power lamp lighting system of terminal processor |
JPS5217733A (en) * | 1975-07-31 | 1977-02-09 | Fujitsu Ltd | Transmission system with interface connection test function |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58103250A (en) * | 1981-12-15 | 1983-06-20 | Nec Corp | Data communication controller |
JPS58146919A (en) * | 1982-02-24 | 1983-09-01 | Mitsubishi Electric Corp | Output circuit |
JPS6226741B2 (en) * | 1982-02-24 | 1987-06-10 | Mitsubishi Electric Corp | |
JPS5912657A (en) * | 1982-07-13 | 1984-01-23 | Meidensha Electric Mfg Co Ltd | Transmission line protecting system of multidrop type information transmission system |
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