Programmable logic controller employing single-chip
US8648620B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 16, 2011 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Apr 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/05
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A PLC includes a single-chip, a relay output module, an I/O module, a pulse output module, a relay, and a servo motor. The single chip includes a single-chip timer, a hardware watchdog, a 11.0592M crystal, and an A/D converter module. A system program is burned into an EEPROM of the single-chip. The relay connected to the relay output module. The servo motor is connected to the pulse output module. The system program includes a programming module and a control module. The programming module includes a main function and a function subroutine library, and the main function calls the subroutines of the function subroutine library. The control module scans the input signals from the I/O module during predetermined period, and then generates output signals according to the control commands generated by the programming module, to control output of the relay output module and the pulse output module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.