Eaton EU5C-SWD-EIP-MODTCP, Руководство пользователя

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5 Commissioning the PLC programming environment
5.2 For Modbus/TCP
SmartWire-DT Gateway EU5C-SWD-EIP-MODTCP 08/17 MN120003Z EN www.eaton.com
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5.2 For Modbus/TCP
5.2.1 What the SWD-Assist text file looks like
The SmartWire-DT I/O data is mapped to 16-bit Modbus
registers
￫ Chapter 7 "Modbus/TCP – SmartWire-DT implementation“, page
72.
In order to make it easier to identify the I/O data in the PLC programming
environment, SWD-Assist generates a TXT file with all I/O data for the corre-
sponding Modbus/TCP information. This information is stored in the form of
a table in a TXT file. It can be edited further directly in a PLC programming
environment or in a spreadsheet program such as Microsoft Excel.
The table below shows how device names are used in I/O addresses and
symbolic names in the TXT file.
Figure 32: I/O data for Modbus/TCP; sample extract from a TXT file
The following information is included:
• The symbolic name -in the "Name" column, made up of:
• The gateway's device name ("ModTCP" in this example)
• The module's device name; "PKEn1" for the SmartWire-DT-PKE con-
nection in this example
• A code used to indicate whether the address is for an input (I) or an
output (Q)
• An individual code for the specific I/O data,
e.g., "C" for the feedback signal for the contactor position
• The name of the input/output
• The address of the Modbus register
• The bit position within the word and the bit length of the
specific input/output data
• The specific input/output data's data type
• A description of the specific input/output data
If this information is used in order to generate input/output variables, the var-
ious definition access methods of the PLC programming environment being
used must be taken into account.