Startup control for multi-drop transmitters powered by current limited power supplies
US10429870B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2016 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Oct 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/66
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of operating process variable transmitters configured for sensing within an industrial processing facility connected in parallel to a current loop that receives power from a common power supply. The transmitters include a power accumulator module including an energy storage device including at least one capacitor or a rechargeable battery and a sensor module including a transceiver coupled to a processor having an associated memory that stores a startup sequencing algorithm. After a fixed period of time following a startup, an initial node voltage is measured across the energy storage device. The initial node voltage is compared to a predetermined voltage, and the transmitter is placed in a low power mode when the initial node voltage is <the predetermined voltage, an at least partially random low power state time for the transmitter is set, and startup sequencing algorithm is restarted after the low power time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.