Slave unit, node unit, controllers and network system
US6944575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2002 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Mar 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Providing a slave that can precisely measure operating time of an output device that is service information, without having effects on a control system. To Mix slave 13 connected to a field network 12, an actuator 14 and sensor 15 that detects completion of operation of the actuator are connected. Having a built-in timer, the Mix slave measures time from when OUT terminal to which the actuator is connected turns ON until IN terminal to which the sensor is connected turns ON, by using the timer. Time thus obtained will be operating time of the output device. Comparison of this operating time with a setting will determine whether or not the actuator normally operates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.