BWM827: high‑precision with high/low‑byte split; select BWH/BWS in Modbus upper‑computer.
BWN427, N427, M827, S2700, S5700: also select BWH/BWS.
BWL317: select single‑axis 180‑degree.
BWM426, BWS2000 and other 1‑byte general‑protocol products: suitable for multi‑device single‑serial‑port upper‑computer.
Failure to recognize COM port: usually missing serial‑port driver on PC side.
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sales@bwsensing.com