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GW PN/ASCII...
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PHOENIX CONTACT 3886_en_A
3.7.1.1 Serial port configuration
To configure serial ports:
1. From the “Serial Settings” page, click the “Port Configuration” tab.
2. In the “Serial Port Configuration” group, specify the settings of each serial port to match
the connected serial device.
Figure 3-9 “Serial Port Configuration” dialog box
Port name : Enter a label for the port. This could correspond to the connected device,
“Shipping Label” for example, for easy identification.
Port mode : Select the port operating mode. Available settings are RS-232 , RS-422 ,
RS-485 2-wire , RS-485 4-wire (M) , and RS-485 4-wire (S) , where “M” indicates
master and “S” indicates slave. When RS-485 4-wire (M) is selected, the RS-485
transmitter is always enabled on the GW PN/ASCII.... When RS-485 4-wire (S) is
selected, the RS-485 transmitter is enabled only when the GW PN/ASCII... has data to
send. This is important when a four-wire RS-485 multidrop network is installed.
Baud rate : Select the baud rate of the serial port; 300 , 600 , 1200 , 2400 , 4800 , 9600 ,
19200 , 38400 , 57600 , 115200 , and 230400 bps are supported.
Parity : Select odd , even , mark , space , or none .
Data bits : Select 5 , 6 , 7 , or 8 data bits.
Stop bits : Select 1 or 2 stop bits.
Flow control : Available options for RS-232 flow control are hardware RTS/CTS ,
software Xon/Xoff , half duplex, and none .
RS-485 terminating resistor: The terminating resistor is used only in RS-485
networks. If the GW PN/ASCII... is the last device in the RS-485 network, enable the
terminating resistor.
DTR mode: Select on all the time or off all the time when a connection is established
on this port.
Rx timeout between packets: This is the maximum spacing between received bytes
allowed before the received Modbus serial message is expected to be complete. The
default value is 200 ms .
Discard packets with errors: If enabled, all packets with parity, framing, or overrun
errors are dropped.
Disable RX queue: If enabled, the receiving queue sends the last received packet to
the PLC during an IO update cycle. By default this option is disabled and the
GW PN/ASCII... buffers received packets and sends the PLC one packet for each IO
update cycle.
Oversize RX packets: When Truncate is enabled, oversized packets are truncated
and sent to the IO controller as cyclic IO data. When SaveRec is enabled, oversized
packets are truncated and sent to the IO controller as cyclic IO data while saving the
original packets as acyclic record data. When Drop is enabled, oversized packets are
dropped.