Contec COM-1PDH-LPE, Руководство пользователя, Страница: 17 / 45

2. Setup
12
COM-1PDH-LPE
Setting Transmission Mode
The data transfer mode setting switch is used to switch between full duplex and half duplex and to
specify whether to use RTS/CTS in full duplex mode. Set the appropriate data transfer mode for the
device with which you are communicating. Bits 3 - 5 are used to set the data transfer mode. Always
set bit 6 is to OFF.
Setting Procedure
Table 2.1. Setting Transmission Mode
LED Indicator
Table 2.2. LED Indicator
LED Operation
Meaning
RxD(Green)
Flashing When receiving RS-422A/485
OFF When not receiving RS-422A/485
TxD(Green)
Flashing When transmitting RS-422A/485
OFF When not transmitting RS-422A/485
RTS
CTS
1 2 3 4 5 6
O N
TERM MODE
1 2 3 4 5 6
O N
TERM MODE
Harf duplex
Transmission
mode
Setting
mode
When there are no
RTS and CTS
Full duplex
TXD is only used for data
transmission; the sending
and receiving modes should
be switched over using the
modem control register.
With abobe setting, RTS
and CTS are connected in
the board.
Communication is available
without wiring of RTS
and CTS.