Flow; Port Number; Table 8 - Common Interface Mode Settings; Table 9 - Flow Control Options - GridConnect NET232 User Manual

The following table demonstrates how to build some common Interface Mode settings:

Table 8 - Common Interface Mode Settings

Common I/F Mode Setting
RS-232C, 8-bit, No Parity, 1 stop bit
RS-232C, 7-bit, Even Parity, 1 stop bit

3.13.3 Flow

Flow control sets the local handshaking method for stopping serial input/output.

Table 9 - Flow Control Options

Flow Control Option
No flow control
XON/XOFF flow control
Hardware handshake with RTS/CTS lines (see note)
XON/XOFF pass characters to host
Note: RTS and CTS control lines are not enabled at the factory. See Configurable Pin Settings on page 3-13.
Note: On the NET232, CP0 should only be set to Clear To Send (CTS) or the default setting. CP1 is not used. CP2
should only be set to Ready To Send (RTS), Data Terminal Ready (DTR) or the default setting.

3.13.4 Port Number

The setting represents the source port number in TCP connections. It is the number used to identify the
channel for remotely initiating connections. Default setting for Port 1 is 10001. Range: 1-65535 except for
the following reserved port numbers:

Table 10 - Reserved Ports

Port Numbers
1 – 1024
9999
14000-14009
30704
30718
Warning: We recommend that you not use the reserved port numbers for this setting as incorrect operation may result.
The port number functions as the TCP/UDP source port number for outgoing packets. Packets sent to the
unit with this port number are received to this channel. The port number selected is the Incoming TCP/UDP
port and Outgoing TCP/UDP source port. Port 0 is used when you want the outgoing source port to change
with each connection.
If the port number is set to 0, the initial value of 50000 will be used to actively establish a connection. Each
subsequent connection will increment the number by 1. When the port number reaches 59999, it will wrap
back to 50000.
The automatic port increment feature must only be used when this device is the one initiating a connection
using TCP. The port must be set to a non-zero value when this is a passive device or when UDP is being
used instead of TCP.
NET232/NETUSB User Guide
Reserved for
Reserved (well known ports)
Telnet setup
Reserved for Comm Port Redirector
Reserved (77F0h)
Reserved (77FEh)
Binary
0100 1100
0111 1000
Hex
00
01
02
05
Hex
4C
78
Configure
3-21