Technologies Video Game Controller User Manual

Ruinet Utility User Manual
Page 16 of 46
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com
Tel: [phone] Fax: [phone] Toll_Free: 888-509-1970 email: [e-mail]
2.3.4. Connection Overview - Error Statistics Aspect
Parameter Description
Connection The current connection being displayed out of the total number.
PEX No slave
Pex mode tried to create a cache block and failed - normally a
failed write-through. See Driver Manual for further information
Server Overruns
A
message arrived from the upstream device while the server port
was on hold. Increase the timeout setting in the external device.
Server Hold Timeouts
If an upstream device requests data from a cache where the data
is too old then the data will be refreshed by polling from the
downstream device. The response was not received in time.
Timeouts
A remote device never responded to the FieldServer poll. Either
the device is not responding, or one of the timeout parameters is
set too low. Ensure that the device is online and addressed
correctly and if necessary increase the relevant timeout parameter
in the CSV file.
Checksum Errors
External influences e.g. electrical noise corrupted the data.
Check that communication cables are shielded, not too long and
do not run past power cables.
Protocol Errors
An external device responded with unexpected or unknown
messages. Consult the relevant driver manual.
Noise Corrupted or garbage bytes on a communications line.
Bad Length A message that looks Ok, but is of the incorrect length.
Bad Node
A no-response/error response from an addressable external
device.
Bad Function E.g. an external device is written to that does not support writes.
No Start Communications to an external device could not be started.
PLC exception A variation of a NAK message produced by some protocols.
NAK A NAK message is received in response to a poll.
Streaming
Data seems to be continuously arriving from an external device.
This could be due to a mismatch in baud rates.
Streaming errors are typically produced when:
1) The transmitter sends more data than the FieldServer can
process.
2) An unexpectedly long message is received or messages have
been corrupted so that the end of a previous message cannot be
detected.
3) A message longer than the driver expects has been received.
Premature
A response from an external device arrived before it was
expected, implying that it is not the response for the poll the
FieldServer has just sent. This could occur when there are time
delays in communication networks which contain bridges and
routers which may delay messages for longer than expected.
Increase the timeout parameter for the connection to eliminate
these errors.
Preamble Characters preceding a message were dropped.
IC Timeouts Too much time between receiving successive bytes in a message.
Address Errors
A
driver tried to address a wrong device or a wrong block of data
within an external device.
Data Object offline A poll was received for a node that is offline.
Node Offline
A
n external device node is offline in response to a driver or