Moxa Technologies user manual 6-16, NE-4100 Series User’s Manual, Web Console Configuration

NE-4100 Series User’s Manual			Web Console Configuration
	Force Transmit
	Setting	Factory Default		Necessity
	0 to 65535 ms	0 ms		Optional
	0: Disable the force transmit timeout.

1 to 65535: Forces the NE-4100’s TCP/IP protocol software to try to pack serial data received during the specified time into the same data frame.

This parameter defines the interval during which NE-4100 fetches the serial data from its internal buffer. If there is incoming data through the serial port, NE-4100 stores the data in the internal buffer. NE-4100 transmits data stored in the buffer via TCP/IP, but only if the internal buffer is full or if the force transmit time interval reaches the time specified as Force Transmit timeout.

Optimal force transmit timeout differs according to your application, but it must be at least as large as one character interval within the specified baud rate. For example, assume that the serial port is set to 1200 bps, 8 data bits, 1 stop bit, and no for parity. In this case, the total number of bits required to send a character is 10 bits and the time required to transfer one character is

( 10 bits / 1200 bits/s ) * 1000 = 8.3 ms.

Therefore, you should set the Force Transmit timeout to be larger than 8.3 ms. Force Transmit timeout is specified in milliseconds and must be larger than 10 ms.

If the user wants to send a series of characters in a packet, the serial device attached to NE-4100 should send characters without time delay larger than Force Transmit timeout between characters and the total length of data must be smaller than or equal to NE-4100’s internal buffer size. The serial communication buffer size of NE-4100 is 1 Kbyte per port.

Destination IP address 1/2/3/4

Setting			Factory Default	Necessity
IP address range			None	Required
E.g.,	Begin: 192.168.1.1
	End:	192.168.1.10
Local Listen port
Setting			Factory Default	Necessity
1 to 65535			4001	Required

The UDP port that NE-4100 listens to, and that other devices must use to contact NE-4100. To avoid conflicts with well known UDP ports, the default is set to 4001.

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