JPS642492A - Remote supervisory and controlling equipment - Google Patents
Remote supervisory and controlling equipmentInfo
- Publication number
- JPS642492A JPS642492A JP15832487A JP15832487A JPS642492A JP S642492 A JPS642492 A JP S642492A JP 15832487 A JP15832487 A JP 15832487A JP 15832487 A JP15832487 A JP 15832487A JP S642492 A JPS642492 A JP S642492A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- code
- switching circuit
- switching
- modulator
- 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
- Arrangements For Transmission Of Measured Signals (AREA)
- Selective Calling Equipment (AREA)
Abstract
PURPOSE: To simplify the titled equipment and to improve the reliability of a system by sharing the modulator, demodulator, and regenerative relay circuit of each slave station for both up-and down-transmission, and switching and using them and switching the incoming level of the demodulator according to a connecting direction.
CONSTITUTION: A polling code or control code from a key station 0 are sent out of a code transmitting and receiving circuit 06 to a transmission line 3 through a modulator 07 and a switching circuit 09. A slave station 1 passes the sent code to a code transmitting and receiving circuit 13 through a 1st switching circuit 18a and a demodulator 14 and sends it out to a transmission line 4 through a (regenerative relay circuit 16), a switching circuit 17, a modulator 15, and a 2nd switching circuit 18b. When the slave station 1 is polled, the switching circuit 17 of the slave station 1 is switched in the opposite direction from that in a figure and the code sent by the code transmitting and receiving circuit 13 is sent out to the transmission line 3 through the switching circuit 17, modulator 15, and 2nd switching circuit 18b. The key station 0 receives it by the code transmitting and receiving circuit 06 through the switching circuit 09 and demodulator 08.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-158324A JPH012492A (en) | 1987-06-25 | Remote monitoring control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-158324A JPH012492A (en) | 1987-06-25 | Remote monitoring control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS642492A true JPS642492A (en) | 1989-01-06 |
JPH012492A JPH012492A (en) | 1989-01-06 |
Family
ID=
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6023356A (en) * | 1997-06-11 | 2000-02-08 | Sony Corporation | Image recording apparatus and method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58162151A (en) * | 1982-03-23 | 1983-09-26 | Nec Corp | System for transmitting information |
JPS59158153A (en) * | 1983-02-28 | 1984-09-07 | Fujitsu Ltd | Data transmission relay system |
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58162151A (en) * | 1982-03-23 | 1983-09-26 | Nec Corp | System for transmitting information |
JPS59158153A (en) * | 1983-02-28 | 1984-09-07 | Fujitsu Ltd | Data transmission relay system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6023356A (en) * | 1997-06-11 | 2000-02-08 | Sony Corporation | Image recording apparatus and method |
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