9560 Transaction Manager User's Manual - Intermec

Common Errors and Causes
10
Troubleshooting
Maximum Transmitted Data
The maximum number of characters transmitted is 215 characters. That is
128 characters for the data, 75 characters for the preambles and postamble, and
12 characters for time. Any protocol characters used during data transmission
are not calculated in the maximum.
• The reader has a 128-character data buffer for transmitting completed
records to the host. The data buffer holds only one data record.
• If the preambles or a postamble have been defined, they are transmitted
with the data. Each preamble or postamble may be 25 characters. If both
preambles and the postamble are defined, then up to 75 characters can be
transmitted with the data..
• If the Append Time to Data parameter is enabled, then the time is
transmitted with the data. The appended time is either 10 characters or 12
characters.
Error Cause
Framing (Transmit or Receive) Incorrect baud rate or number of data bits.
Parity (Transmit or Receive) Incorrect parity.
Start of Message (Receive Only) SOM character not received before data string.
Longitudinal Redundancy Check (Receive Only) Incorrect LRC character received.
Host Aborted (Transmit or Receive) RES character received from host while expecting
data or handshake response.
Timeout (Transmit or Receive) Received timeout exceeded.
UART Overflow (Transmit or Receive) Characters received faster than the reader could
process them.
Buffer Overflow (Receive Only) Characters received faster than the reader could
process them, or message longer than 254
characters.
Bad Transmit (Transmit only) Retry limit exceeded.
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