Control device for performing test of safety signal circuit, and control method for performing test of safety signal circuit
US12386331B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2021 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Apr 24, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50198
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control device has first and second control units. The first unit includes a timing unit which measures elapsed time and instructs the start of a first safety signal circuit test based on the time, and a first circuit test control unit which, when a safety signal circuit output signal has been output to a first circuit, or output thereof has stopped, detects whether a safety signal circuit input signal is input, and executes the first safety signal circuit test. The second unit is provided with an implementation verifying unit which verifies whether the first safety signal circuit test is complete, and a second circuit test control unit which, after verification, when a safety signal circuit output signal is output to a second circuit, or when output thereof has stopped, detects whether a safety signal circuit input signal is input, and executes a second safety signal circuit test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.