Startechcom ICUSB422IS Manual de usuario descargar pdf (Pagina 6)

Instruction Manual

Switch Settings

The default settings on the ICUSB422IS are set at 2-wire RS-485 mode. If you require

RS422, change the mode pin to the “422” position (ON). Maintain all other settings

unchanged.

Switch Description

Note: If the mode is set to 422, the ECHO setting will take no eect. The echo mode

is useful for the program to detect if the RS-485 bus were in a collision. If the echoed

data is not equal to the transmitted data, then the bus has been in a collission.

Switch

Pin #

Switch

Function

Switch

Positions

Description

RS-485

(OFF)

(Default)

2-wire RS-485 mode

RS-422 (ON) 4-wire RS-422 mode

ECHO (OFF)

Transmitting data will be echoed

back

NO ECHO

(ON)

(Default)

No echo data

NO TERM

(OFF)

(default)

Termination Resistor is Disabled

TERM (ON) Termination Resistor is Enabled

4 RVD

(OFF) Reserved for Future Use

(ON) Reserved for Future Use

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Startechcom ICUSB422IS Manual de usuario Pagina 6