Multi-32/lpci va3 – Solvline PCI User Manual
Page 156
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156
Multi-32/LPCI VA3
b. PORTx RT : RS422, RS485 terminal resister selection jumper
10M: Not use Slew Rate Limit function. Maximum communication speed
921.6Kbps in this mode.
250K: Use Slew Rate Limit function. Communication speed is limited under
250Kbps.
Slew Rate Limit reduces reflected waves emitting from ends of
communication cables and speeds up slew-rate driver that restrains EMP
electromagnetic waves thereby enabling communication with no data errors.
But communication speed is limited in this mode.
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