JPS55131855A - Transmission protection system for control signal - Google Patents

Transmission protection system for control signal

Info

Publication number
JPS55131855A
JPS55131855A JP3955179A JP3955179A JPS55131855A JP S55131855 A JPS55131855 A JP S55131855A JP 3955179 A JP3955179 A JP 3955179A JP 3955179 A JP3955179 A JP 3955179A JP S55131855 A JPS55131855 A JP S55131855A
Authority
JP
Japan
Prior art keywords
output signal
specific pattern
transmission
control
control signal
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
Application number
JP3955179A
Other languages
Japanese (ja)
Inventor
Saburo Kamei
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3955179A priority Critical patent/JPS55131855A/en
Publication of JPS55131855A publication Critical patent/JPS55131855A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To protect sufficiently the transmission of a control signal to a unit to be controlled by detecting the coincidence of each output signal corresponding to a specific pattern sent out from a control system in sequence at intervals of constant time, in a transmission protection system for the control signals to the controlled unit in trouble.
CONSTITUTION: Detectors 2 and 3, connected to buses D0, D1, D2 and D3 detect a different specific pattern to generate an output signal and delay circuit 4 give the output signal time delay corresponding to the transmission timeing of the specific pattern. Then, control system 1 sends the specific pattern onto buses in sequence with a constant difference in time and NAND circuit 5, when detecting the coincidence of each corresponding output signal, validates the control signal outputted from system 1. Consequently, when the control system is in trouble, the transmission protection of control signals to the controlled unit can sufficiently come into effect.
COPYRIGHT: (C)1980,JPO&Japio
JP3955179A 1979-04-02 1979-04-02 Transmission protection system for control signal Pending JPS55131855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3955179A JPS55131855A (en) 1979-04-02 1979-04-02 Transmission protection system for control signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3955179A JPS55131855A (en) 1979-04-02 1979-04-02 Transmission protection system for control signal

Publications (1)

Publication Number Publication Date
JPS55131855A true JPS55131855A (en) 1980-10-14

Family

ID=12556190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3955179A Pending JPS55131855A (en) 1979-04-02 1979-04-02 Transmission protection system for control signal

Country Status (1)

Country Link
JP (1) JPS55131855A (en)

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