IP Relay – 2x relay + RS-232 / Ethernet converter
HW group
June 2006
www.HW-group.com
Page 22 / 28
Serial port parameters
====== Serial Setup ======
&B: Speed
9600
Configuration of the communication speed for the serial line, range 50..115.200 Bd, step 50 Bd. To set
9600 Bd enter: „&B9600”.
&D: Data bits 8
Number of data bits for the serial transfer. Possible options:
7: 7 bits / 8: 8 bits – call „
&D8
“.
&P: Parity
NONE
Parity of the serial asynchronous communication:
N: none
/
O: odd
/
E: even
/
M: mark
/
S: space
&V: Variable Parity Off
Activation of 9-bit data transfer.
0: Off / 1: On
&S: Stop bits 2
Number of stop bits for the RS-232 serial line. It’s possible to set 1 or 2 stop bits.
&C: Flow Control
NONE
Serial data flow control.
1: none
- no control, RTS - see &R.
2: RTS/CTS
–RTS/CTS control
3: Xon/Xoff -
SW data flow control.
&R: RS485/RS422 control
Defines idle level of the output RTS pin. Important for devices powered from RTS or for add-on RS485
Devices that use RTS to switch direction. Especially for the internal RS485 module, the “
HW echo
”
option should be on. This means that the receiver reads the data back from RS485 and generates
hardware echo from the actual RS485 bus.
0: RTS = Low [+8V] (recomended for non RS485/422 mode)
1: RTS = High [-8V]
2: TxRTS HW echo ON
3: TxRTS HW echo OFF
&T: Serial Line Timeout 0 – Off
Specifies how long the Device waits
after receiving the last character
before wrapping up the
data in a packet and transmitting them. The timeout is specified as the
number of characters
and
displayed as the number of chars as well as the time according to the given serial communication
speed. If the speed changes, the time is also changed but the number of characters defining the
timeout is not (10 znak
ů
pro 9600 je cca 11 ms, ale pro 19.200 Bd je to 5,7 ms).