Yokogawa Data Logging Software GA10 - Manual (Page 56)

3-32
IM 04L65B01-01EN
Note
• Projects that you can simultaneously control are those
that you have Operator or higher privileges for.
• If a Modbus device definition file that you are using
contains an error, data collection will not start on the
corresponding project.
Chapter 3 Configuring and Starting Data Collection and Recording
3.4 Registering Modbus Devices
GA10 can connect to devices that use the Modbus
protocol.
To register such a device, you must create a Modbus
device definition file in advance and save it in a specific
server folder .
The Modbus device definition file must contain device
names, register positions for data collection, and so on.
The basic registration procedure is explained below.
Basic Operation
1
Create a Modbus device definition file in XML format
by referring to the provided example.
We suggest that you use the Windows standard
Notepad or a text editor to edit the file.
2
Save the file.
Save the file using UTF-8 encoding.
3
Place the Modbus device definition file in the C:\
Program Files\Yokogawa Electric Corporation\
SMARTDAC+ Data Logging Software\Modbus folder
of the PC in which the server is installed.
4
Restart the server.
Restart procedure: section 2.6.1
The name of the registered Modbus device appears
next to Device Type in the Register device dialog
box .*
* A dialog box for registering new devices.
Note
When using a Modbus definition file to perform
communication through the Ethernet interface, set the
scan interval to a value less than the communication
timeout value of the device.
What Is a Modbus Device Definition File?
The Modbus device definition file is a file that is referred
to when a new Modbus device is registered on the Device
Setting Page.
A Modbus device definition file is composed of the
following four sections.
Option list
This is where the Modbus device options are
defined.
Register list
This is where the Modbus device’s registers that
are read during data collection are defined. Modbus
Function codes, register addresses, data types, and
register names are specified in this section.
Channel list
This is where the Modbus device’s channels that are
read during data collection are defined. You can also
specify channel settings, collection data positions,
and related alarm information.
Value conversion table
This is where the table for converting the data read
from the Modbus device’s registers into values for
actual use is defined.
Modbus device definition files are in XML format.
Descriptions in files have a hierarchical structure.
For details on the format, see page 3-33 and subsequent pages .