Resolve UDP Port Warning: Unable to Read Any Data
These remedies apply when you receive no data and you get this warning message:
'udpport' unable to read any data
Try these remedies to resolve the following causes when you use the UDP interface for:
Reading ASCII (text) data using the
Reading binary data using the
|An invalid command was sent to the destination UDP port, so there is a problem reading the response to the command.
|Check the manual of the destination device for proper command formatting.
|An incorrect write terminator was sent to the destination UDP port before attempting to read data, so there is no data to read.
|Verify that the
Terminator property is set to
the value required by your destination UDP port. For more
information about setting the property, see
|The destination UDP port did not receive the command because of an incorrect destination port value.
|Verify that the UDP destination port value is set to the port
number the device is listening on. For more information about
setting the destination port, see
|A firewall is blocking incoming UDP packets.
|Verify that your system firewall setting allows connections to
|The UDP packet size is larger than the maximum packet size that can be handled by the Ethernet adaptor.
|The UDP packet size is controlled by the
OutputDatagramSize property. You can specify
the size, in bytes, between 1 and 65507, and the default value is