9 Appendix
9.1 Data image of the technology modules
182
XI/ON: XNE-GWBR-2ETH-MB
10/2011 MN05002008Z-EN
www.eaton.com
Table 83:
Process output
data of
XN-1RS×××
Designation
Value
Meaning
STATRES
0–1
This bit is set to reset the STAT bit in the process input data.
With the change from 1 to 0 the STAT bit is reset (from 0 to 1).
If this bit is 0, all changes in TX_BYTE_CNT, TX_CNT and
RX_CNT_ACK are ignored.
Flushing the transmit-/ receive-buffer with RXBUF FLUSH/
TXBUF FLUSH is possible.
If this bit is 1 or with the change from 0 to 1, the flushing of the
transmit-/ receive-buffer with RXBUF FLUSH/ TXBUF FLUSH is
not possible.
RXBUF FLUSH
0–1
This bit is used to flush the receive-buffer.
If STATRES = 1:
The command RXBUF FLUSH = 1 is ignored.
If STATRES = 0:
RXBUF FLUSH = 1 causes the flushing of the receive-buffer.
TXBUF FLUSH
0–1
This bit is used to flush the transmit-buffer.
If STATRES = 1:
The command TXBUF FLUSH = 1 is ignored.
If STATRES = 0:
TXBUF FLUSH = 1 causes the flushing of the tranceive-buffer.
RX_CNT_ACK
0–3
The value RX_CNT_ACK is a copy of the value RX_CNT.
TX_CNT has been transmitted together with the last data
segment of the process input data.
TX_CNT_ACK is an acknowledge for the successful transmis-
sion of the data segment with RX_CNT.
TX_CNT
0–3
This value is transferred together with every data segment.
The TX_CNT values are sequential:
00->01->10->11->00...
(decimal: 0->1->2->3->0...)
Errors in this sequence show the loss of data segments.
TX_BYTE_CNT
0–7
Number of the valid user data in this data segment. In
PROFIBUS-DP, the data segments contain a maximum number
of 6 bytes of user data.