JPS5476032A - Communication control system - Google Patents
Communication control systemInfo
- 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
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
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)
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 |
-
1977
- 1977-11-30 JP JP14341377A patent/JPS5476032A/en active Granted
Cited By (2)
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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