Setting The Format - Dil Switches - W&T RS422 Handbuch

W&T
If the T-switch receives an XOFF code or detects a block level
(negative level) on the hardware handshake input, it stops
sending data on the corresponding port no later than one byte
after this state is detected. If the T-switch receives an XON code
or detects an enable level (positive level) on the hardware
handshake input, it resumes sending data.
The XON and XOFF codes are used only for the handshake;
these codes are not data and are also not allowed to be
contained in the user data. If a hardware handshake is used
however and the T-switch is correspondingly configured, the
XON and XOFF codes are treated as normal data.
When hardware handshake inputs are open or improperly wired,
the T-switch may send no data on the affected port.
If you use only software handshake and configure the
T-switch accordingly, this problem will of course not occur.

Setting the format - DIL switches

The DIL switch banks SW1, SW2 and SW3 have the same
scope of functions for all three ports: the individual switches
determine the transmission speed, the number of data bits, the
parity and the handshake procedure of the respective port. The
function of the individual switches can be seen in the following
tables:
handshake
hardware handshake
software handshake
parity
no parity
odd parity
even parity
14
RS232(/RS422/RS485) Multi Computer Adapter
data bit
S1
7 data bit
off
8 data bit
ON
S7 S8
X off
off ON
ON ON
S6
off
ON