5 Implementation of Modbus TCP
5.3 Modbus registers
54
XI/ON: XNE-GWBR-2ETH-MB
10/2011 MN05002008Z-EN
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5.3
Modbus registers
Note
The Table 11:, Mapping of XNE-GWBR-2ETH-MB Modbus registers (holding regis-
ters), Page 56 shows the register mapping for the different Modbus addressing
methods.
Table 10:
Modbus
registers of the
gateway
Address (hex.)
Access
A
Description
A
ro = read only
rw = read/write
0×0000 to 0×01FF
ro
packed process data of inputs
(process data length of modules, see Table 12:
Data width of the I/O-modules, Page 61)
0×0800 to 0×09FF
rw
packed process data of outputs
(process data length of modules, see Table 12:
Data width of the I/O-modules, Page 61)
0×1000 to 0×1006
ro
gateway identifier
0×100C
ro
gateway status (see Table 13: Register 100Ch:
gateway-status, Page 63)
0×1010
ro
process image length in bit for the intelligent
output modules
0×1011
ro
process image length in bit for the intelligent input
modules
0×1012
ro
process image length in bit for the digital output
modules
0×1013
ro
process image length in bit for the digital input
modules
0×1017
ro
register-mapping revision (always 1, if not,
mapping is incompatible with this description)
0×1018 to 0×101A
ro
group diagnostics of I/O-modules 0 to 32
(1 bit per I/O-module)
0×1020
ro
watchdog, actual time [ms]
0×1120
rw
watchdog predefined time [ms] (default: 0)
0×1121
rw
watchdog reset register
0×1130
rw
modbus connection mode register
0×1131
rw
modbus connection time-out in seconds
(default: 0 = never)
0×113C to 0×113D
rw
modbus parameter restore
0×113E to 0×113F
rw
modbus parameter save
