
XI/ON: XN-1RS232
09/2011 MN05002013Z-EN
www.eaton.com
23
2 Integrating the Module in PROFIBUS-DP
PROFIBUS-DP data image
Process output
The process output data is the data that is output
from the PLC to a field device via the gateway and
an XN-1RS232 module.
The data received from the PLC in the XN-1RS232
module is entered in a 64 byte transmit buffer.
The PROFIBUS-DP fieldbus transmission is carried
out in the following 8-byte format:
• 6 bytes are used to contain the user data.
• 1 byte contains signals for triggering the clearing
of the transmit and receive buffers.
• 1 control byte is required to ensure trouble-free
transmission of the data.
Table 7:
Structure of the data bytes in the PROFIBUS-
DP fieldbus
PZDA
B7
B6
B5
B4
B3
B2
B1
B0
Byte0
Data byte 5
…
...
Byte 5
Data byte 0
Byte 6
reserved
RXBUF
FLUSH
TXBUF
FLUSH
Byte 7
(Control)
STAT
RES
RX_CNT_ACK
TX_CNT
TX_BYTE_CNT
Содержание XN-1RS232
Страница 1: ...User Manual XI ON 09 2011 MN05002013Z EN replaces M001777 02 04 2007 XN 1RS232 Technology Module...
Страница 8: ...About This Manual Writing conventions 8 XI ON XN 1RS232 09 2011 MN05002013Z EN www eaton com...
Страница 20: ...1 Product Description Base modules 20 XI ON XN 1RS232 09 2011 MN05002013Z EN www eaton com...
Страница 86: ...Index 86 XI ON XN 1RS232 09 2011 MN05002013Z EN www eaton com...