JPS6425206A - System for processing input/output of programmable controller - Google Patents

System for processing input/output of programmable controller

Info

Publication number
JPS6425206A
JPS6425206A JP17995987A JP17995987A JPS6425206A JP S6425206 A JPS6425206 A JP S6425206A JP 17995987 A JP17995987 A JP 17995987A JP 17995987 A JP17995987 A JP 17995987A JP S6425206 A JPS6425206 A JP S6425206A
Authority
JP
Japan
Prior art keywords
information
area
address
programmable controller
stored
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
JP17995987A
Other languages
Japanese (ja)
Inventor
Keiichi Ito
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP17995987A priority Critical patent/JPS6425206A/en
Publication of JPS6425206A publication Critical patent/JPS6425206A/en
Pending legal-status Critical Current

Links

Landscapes

  • Programmable Controllers (AREA)

Abstract

PURPOSE:To easily detect erroneous input, by storing attribute information representing whether or not an information area is unused in a storage area where input/output information is stored. CONSTITUTION:A programmable controller which performs the operation control of an external equipment is constituted of a processor which executes a sequence program, a memory device 2', etc. In each address of the memory device 2', an area 14 which stores null address information at a leading one bit is provided. And an area 15 which stores information to which the programmable controller is inputted and outputted is arranged following the area 14. In such a way, in the null address information area 14, '1' is stored when the information to be stored in the address is usable, and '0' when it is a null address. As a result, it is possible to detect whether or not a designated address is the null address.
JP17995987A 1987-07-21 1987-07-21 System for processing input/output of programmable controller Pending JPS6425206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17995987A JPS6425206A (en) 1987-07-21 1987-07-21 System for processing input/output of programmable controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17995987A JPS6425206A (en) 1987-07-21 1987-07-21 System for processing input/output of programmable controller

Publications (1)

Publication Number Publication Date
JPS6425206A true JPS6425206A (en) 1989-01-27

Family

ID=16074958

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17995987A Pending JPS6425206A (en) 1987-07-21 1987-07-21 System for processing input/output of programmable controller

Country Status (1)

Country Link
JP (1) JPS6425206A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5547504A (en) * 1978-09-28 1980-04-04 Siemens Ag Stored program controller
JPS5591034A (en) * 1978-12-29 1980-07-10 Fujitsu Ltd Fault detection system
JPS60125997A (en) * 1983-12-13 1985-07-05 Fujitsu Ltd Write system of writable read only memory element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5547504A (en) * 1978-09-28 1980-04-04 Siemens Ag Stored program controller
JPS5591034A (en) * 1978-12-29 1980-07-10 Fujitsu Ltd Fault detection system
JPS60125997A (en) * 1983-12-13 1985-07-05 Fujitsu Ltd Write system of writable read only memory element

Similar Documents

Publication Publication Date Title
JPS5717019A (en) Numerical controller
JPS54117640A (en) Memory address designation system
JPS6425206A (en) System for processing input/output of programmable controller
JPS5495133A (en) Input/output processing control system
JPS5443648A (en) Logout controller
JPS6431238A (en) System for controlling store buffer
JPS55108057A (en) Duplex control unit
JPS6464032A (en) Information retrieving system
JPS5614358A (en) Operation log storing system
JPS55166757A (en) Check unit for overlapping use of output instruction
JPS6418817A (en) Display/selection device for hierarchy menu
JPS57776A (en) Display system for status
JPS57187752A (en) Data gathering device
JPS5621258A (en) Failure storage system in central processing unit
JPS57191758A (en) System for storing test program in main storage
EP0267663A3 (en) Weighing system
JPS6476348A (en) Memory checking method
JPS5453842A (en) Program run control circuit
JPS5510626A (en) General controller
JPS6429935A (en) Program execution control system
JPS57162031A (en) Address stack control system
JPS5719807A (en) Sequence controller
JPS5523536A (en) Program load system in electronic computer system
JPS5760445A (en) Processing system of micro-instruction
JPS6454563A (en) Input/output controller