5 Implementation of Modbus TCP
5.4 Structure of the packed in-/ output process data
60
XI/ON: XNE-GWBR-2ETH-MB
10/2011 MN05002008Z-EN
www.eaton.com
5.4.1
Packed input-process data
• input register area:
0000h
to
01FFh
Status/ diagnosis
The area "status/diagnosis" comprises a maximum of 9 registers.
The first register contains a common gateway-/station-status.
The following registers (max. 8) contain a group diagnostic bit for each I/O-module which
shows whether a diagnostic message is pending for the relevant module or not.
5.4.2
Packed output process data
• output register area:
0800h
to
09FFh
0000h
01FFh
intelligent modules,
input data
digital input modules
status/ diagnosis
free
Note
Independent of the I/O-configuration, an access to all 512 registers is always possi-
ble. Registers that are not used send "0".
Status/ diagnostic
n + 0000h
n + 0008h
gateway status
(Reg. 100Ch)
group diagnosis I/O-modules 0...127
(registers 1018h to 101Fh)
0800h
09FFh
intelligent modules,
output data
digital output data
free
Note
Independent of the I/O-configuration, an access to all 512 registers is always possi-
ble. Registers that are not used send "0" answering a read access, write accesses
are ignored.
