JPS5476032A - Communication control system - Google Patents

Communication control system

Info

Publication number
JPS5476032A
JPS5476032A JP14341377A JP14341377A JPS5476032A JP S5476032 A JPS5476032 A JP S5476032A JP 14341377 A JP14341377 A JP 14341377A JP 14341377 A JP14341377 A JP 14341377A JP S5476032 A JPS5476032 A JP S5476032A
Authority
JP
Japan
Prior art keywords
time
timer
over
constitution
released
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
Application number
JP14341377A
Other languages
Japanese (ja)
Other versions
JPS5742257B2 (en
Inventor
Tomohito Shibata
Noboru Yamamoto
Tadaaki Imai
Kanzo Noda
Toshiaki Ihi
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 JP14341377A priority Critical patent/JPS5476032A/en
Publication of JPS5476032A publication Critical patent/JPS5476032A/en
Publication of JPS5742257B2 publication Critical patent/JPS5742257B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the non-communication time greatly by securing such constitution in that the next polling signal can be transmitted even in case the 1st timer has time-over and the 2nd timer does not.
CONSTITUTION: Both 1st and 2nd timer T1 and T2 start their operation when bit TST of control register 4 is "1" and stop the operation when bit TSP is "1". And T1 is released to the original state when the reception data is "0" and counted up when the data is "1" respectively. Both T1 and T2 deliver the time-over signal when they exceed the fixed level, and thus the time-over interruption is given to circuit control channel 1. T1 is released to the original state when the master station receives "0" due to the noise, etc. given to the circuit and even with no answer to the polling, and sometimes has no time-over indefinitely. In order to avoid such condition, T2 is provided. And the set time of T2 is determined by the data length and the terminal number like the conventional timer.
COPYRIGHT: (C)1979,JPO&Japio
JP14341377A 1977-11-30 1977-11-30 Communication control system Granted JPS5476032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14341377A JPS5476032A (en) 1977-11-30 1977-11-30 Communication control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14341377A JPS5476032A (en) 1977-11-30 1977-11-30 Communication control system

Publications (2)

Publication Number Publication Date
JPS5476032A true JPS5476032A (en) 1979-06-18
JPS5742257B2 JPS5742257B2 (en) 1982-09-08

Family

ID=15338182

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14341377A Granted JPS5476032A (en) 1977-11-30 1977-11-30 Communication control system

Country Status (1)

Country Link
JP (1) JPS5476032A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739641A (en) * 1980-08-20 1982-03-04 Fujitsu Ltd Data transmission controlling system
JPH06164680A (en) * 1992-11-27 1994-06-10 Nec Corp Communication controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739641A (en) * 1980-08-20 1982-03-04 Fujitsu Ltd Data transmission controlling system
JPH06164680A (en) * 1992-11-27 1994-06-10 Nec Corp Communication controller

Also Published As

Publication number Publication date
JPS5742257B2 (en) 1982-09-08

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