Rockwell Automation Allen-Bradley 1769-ASCII, User Manual

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76 Rockwell Automation Publication 1769-UM012B-EN-P - January 2014
Chapter 3 I/O Memory Mapping
Status Descriptions
This table describes the status tags.
Add-On Profile Abbr. Definition
ChxHandshakeError HE Handshake error. Used for Handshake mode only.
ChxNewData ND New data. Used for Handshake mode only.
ChxNonDelimitedRecord NR Non-delimited record. An input record is received and sent to the Compactbus
interface that was not triggered by receiving a delimiter character. This occurs
when either the buffer is filled to its maximum receive size or a Message
Timeout has occurred.
ChxParityError PA Parity error. A parity error has occurred with the received data string. This
usually indicates a mismatch in the serial port setup of the ASCII device and the
Compact module. It can indicate also that noise has occurred on the line and
degraded the signal.
This bit is set when the receive FIFO contains a message that parity error
occurred in on of the incoming bytes. This bit is reset when the receive FIFO is
emptied or when a new message is received with no parity error.
ChxRxFIFOEmpty RF Data in the receive FIFO. The FIFO is not empty. The input FIFO has not sent all
of its data to the CompactBus interface.
ChxRxDataLost RO Receive buffer overflow. Some input data has been lost.
ChxTxFIFOEmpty TF Data in transmit FIFO. The FIFO is not empty. The output FIFO has not sent all of
its data to the ASCII device.
Ch0TxDataOverFlow TG Transmit greater than Max Error. Transmit length in the output file is greater
than the maximum transmit character length in the configuration file.
ChxTxDataLost TO Transmit buffer overflow. Some output data has been lost.
ChxTxDataSent TS Transmit sent. Indicates that the 1769-ASCII module has sent the data
indicated by the Tx Transaction ID and can accept more transmit data.