Micromod MOD: Extended Modbus (XModbus) OPC Server Users Guide - Manual (Page 34)

Extended Modbus OPC Server
Operation and Reference
4.2 Standard Modbus OPC Server
4.2.1 OPC Tag Database
The Modbus device tag database is typically made up of the following:
Figure 4 .8.
OPC Server Tag
Database
Devices: These are hardware devices (Commander / 2050) connected to the OPC Server.
Groups: Tags/Signals can be grouped into groups. Groups follow devices that means that
you can have make groups of tags from a device. Grouping is only for the user’s
convenience. The user can change group properties, such as name.
Tags: Tags define the properties of signals such as address of the signal, group and
device it belongs to, data type and scaling. Examples of tags are PV, SP, and OP
etc.
Alternately, having a .CSV file is very handy. Importing Tags from a CSV file into the
OPC tag database will create the groups and signals automatically. This will save a
tremendous amount of time compared to creating them manually.
4.2.2 Tag Properties
The Modbus Tag Data property sheet allows the following data to be configured:
Name: Enter a name for the tag.
Description: Enter a description for the tag.
Location (Input Coil, Output Coil, Input Register, Output Register)
Data Type (Word, Unsigned Word, Dword, Unsigned Dword, Float, Dfloat.
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