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PortStore5 Manual HW group
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&A: DTR Output
Defines the idle level of the DTR output pin. Important for devices powered from the DTR pin.
0: DTR = continuously asserted [~ +8V]
1: DTR = unasserted [~ -8V]
2: DTR = asserted while connected
&I: RS485/RS422 control Off
For RTS or downstream RS485 converters that use RTS to toggle transmission/reception. For the built-in
RS-485 driver, the “
HW echo ” option applies, meaning that the device reads back the data sent to the RS-
485 line and generates an echo from the actual RS-485 bus.
0: Off
2: TxRTS HW echo ON
(recommended for RS-485 debug only! )
3: TxRTS HW echo OFF ( RS-485 )
Note: For most RS-485 applications, set &R3 – TxRTS HW echo OFF .
&T: Serial Line Timeout 0 – Off
If no data are received from the serial line for the specified time, characters received so far are
packed into an Ethernet packet and sent off.
The timeout is specified as the number of characters , and displayed as the number of chars as well
as the time based on the current serial communication speed. If the speed changes, the time is
recalculated but the number of characters defining the timeout stays the same (10 characters means
about 11 ms at 9600 Bd, or 5.7 ms at 19200 Bd).
&G: Char. Transmit Delay 0 – Off
When controlling devices with a small RS232 buffer, it is sometimes advantageous to keep a
relatively high baud rate but insert delays between individual characters. The delay is specified in
milliseconds and defines the time between the starts of individual characters. Therefore, delays
under 2 ms have no effect at 2400 Bd because individual characters are 2.4 ms apart.
&H: Tx Control Tx FULL duplex
When HALF duplex is activated, the converter expects unidirectional communication over the serial
line (RS485) and never starts to transmit data while receiving.
&Q: EOT Trigger character 26
Packet termination character. The default is 26 (ctrl-Z in ASCII). In common operating systems, ctrlZ
is the EOF (End Of File) character. When this character is received from the serial line, the device
does not wait for the “&T” timeout and immediately sends everything as a packet over LAN.
%S: TCP/IP setup On
Enables or disables remote configuration through the TCP Setup at port 99. This command only
works in the
RS-232 Setup mode.
0: TCP Setup disabled
1: TCP Setup enabled
(TCP server at port 99)
0: FULL duplex (RS-232)
1: HALF duplex (RS-485)