Advantech SIMB-354 User Manual page 19

1.9.3 COM3 RS-232/422/485 Mode selector (JSETCOM3)
Users can select between the RS-232/422/485 modes for COM3 using JSETCOM3.
The default setting is "RS-232".
Table 1.3: COM3 RS-232/422/485 Mode selector (JSETCOM3)
Function
Set COM3 as RS-232 (default)
Set COM3 as RS-422/485
(Full Duplex)
Set COM3 as RS-485
(Half Duplex)
Table 1.4: COM3 RS-232/422/485 Mode selector (JSETCOM3)
Function
RS-232*
RS-422/485 (Full Duplex)
RS-485 (Half Duplex)
*default
SIMB-354 User Manual
Setting
Jumper Settings
(3-4) + (5-6) closed
(5-6) closed
(1-2) + (5-6) closed
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