Remote I/O port for transfer of I/O data in a programmable controller
US4809217A · kind A · utility
60Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1985 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Oct 31, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/1205
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method and apparatus for access to a programmable controller at a remote location. A peripheral device with a peripheral processor is connected to a port on an I/O module. Blocks of discrete and block transfer data are transferred to and from a common memory in the I/O module where the data is accessible to a serial communication controller that interfaces the module to a high speed serial data channel. Asynchronous communication is provided between the serial communication controller and the peripheral device using a circular buffer in the common memory. Timing considerations are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.