Weidmuller WI-GTWY-9 User Manual page 125

WI-GTWY-9-xxx Wireless Gateway
Modbus/TCP Addressing
The IN and OUT areas of the Ethernet interface are addressed under Modbus/TCP according to
the tables below. Since Modbus uses a 16-bit format, "Word (16-bit) Address Mode" will be
automatically applied whenever the "Modbus/TCP" checkbox is checked. If Ethernet/IP is also
enabled, the "Disable I/O Instance" option must be selected for each fieldbus mapping to which
Modbus/TCP Addressing is to apply.
IN Area Modbus TCP Addresses (WI-GTWY-9-xxx Write Locations 0 – 1023*)
IN Modbus
Area Word
Location Address
0
1
1 2
---
---
1022 1023
1023 1024
OUT Area Modbus TCP Addresses (Fieldbus READ Locations 0 – 1023*)
OUT Modbus
Area Word
Location Address
0 1025
1 1026
--- ---
1022 2047
1023 2048
* Assumes Word Mode Addressing is selected in Configuration Software
The Fieldbus IN and OUT areas can be configured to a maximum size of 1024 words (2048
bytes) each, depending on the configured fieldbus mappings. The highest mapped location will
correspond to the highest available Modbus register (or coil) available to a Modbus/TCP client.
A Modbus/TCP client must use the appropriate Modbus Coil or Modbus Word addresses
corresponding to configuration software, as well as the correct function code (see 4.12.2
Supported Commands).
Modbus Bit Address
Bit 15 Bit 14 Bit 13
1 2 3
17 18 19
--- --- ---
16353 16354 16355
16369 16370 16371
Modbus Bit Address
Bit 15 Bit 14 Bit 13
16385 16386 16387
16401 16402 16403
--- --- ---
32737 32738 32739
32753 32754 32755
--- Bit 2 Bit 1
--- 14 15
--- 30 31
--- --- ---
--- 16382 16383
--- 16382 16383
--- Bit 2 Bit 1
--- 16398 16399
--- 16414 16415
--- --- ---
--- 32750 32751
--- 32766 32767
V1.18
Bit 0
16
32
---
16384
16384
Bit 0
16400
16416
---
32752
32768
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