Perle Systems SCS8C DC User Manual

 148

Serial Port Profiles

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Port - Serial data being forwarded to the LAN from the serial device will sent to this UDP 
port. Only data originating from the UDP port configured here (as well as originating from a 
host in the IP range defined for this entry) will be forwarded to the serial device.

Special values for "Start IP address"

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0.0.0.0 - This is the "auto learn IP address” value which is valid only in conjunction with the 
"LAN to Serial" setting. The first UDP packet received for this serial port will set the IP address 
from which we will accept future UDP packets to be forwarded to the serial port. For this setting, 
leave the "End IP Address" as 0.0.0.0.

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255.255.255.255 - This selection is only valid in conjunction with the "LAN to Serial" setting. It 
will accept all UDP packets received for this serial port regardless of the originating IP address. 
For this setting, leave the "End IP Address" as 0.0.0.0.

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Subnet directed broadcast - You can use the “Start IP Address” field to enter a subnet directed 
broadcast address. This is done by specifying the subnet address with the host portion filled with 
1s. For example, if you are on the subnet 172.16.x.x with a subnet mask of 255.255.254.0 than 
you would specify an IP address of 172.16.1.255 (all ones for host portion). For this setting, 
leave the "End IP Address" as 0.0.0.0. For any “LAN to Serial” ranges you have defined for this 
serial port, you must ensure that IP address of this IOLAN is not included in the range. If your IP 
address is within the range, you will receive the data you send via the subnet directed broadcasts 
as data coming in from the LAN.

An example UDP configuration is described based on the following window.

The UDP configuration window, taken from the DeviceManager, is configured to:

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All UDP data received from hosts that have an IP address that falls within the range of 

 to 

 and source UDP 

 of 

 will be sent to the serial device. 

The IOLAN will not send any data received on its serial port to the host range defined by this 
entry.

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All hosts that have an IP Address that falls within the range of 

 to 

 

and who listen to UDP 

 

 will receive UDP data from the serial device. No UDP data 

originating from the hosts defined by this entry will be forwarded to the serial device.

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All hosts that have an IP address that falls within the range of 

 to 

 

and listen to 

 

 will be sent the data from the serial device in UDP format. The serial 

device will only receive UDP data from the hosts in that range with a source UDP 

 of 

. The IOLAN will listen for data on the port value configured in the 

 parameter. (10001 in above example)

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