89
Protocol Description
Modbus
RTU
Master
The controller acts as the Modbus Master and used for
communication between The controller and third-party
Modbus Slave devices, for example I/O modules.
Modbus
ASCII
Master
The controller acts as the Modbus Master and used for
communication between The controller and third-party
Modbus Slave devices, for example: I/O modules.
Table 6-4: Parameter descriptions of Modbus RTU Master and
Modbus ASCII Maste
4. Click Save to save the configuration, or click Back to return to the
Home Page.
5. Click Connect from the Home Page to connect a controller. For the
user name and password, see "User Privileges" in ControlEdge
Builder User's Guide.
6. Click Download from the Home Page to load the configuration of
Modbus Serial Master to the controller.
7. Click IEC Programming Workspace from the toolbar.
8. Right-click Logical POUs and select Insert > Program to add a new
POU.
9. Under Physical Hardware, right-click Task and select Insert > Task to
add a task.
10. Right-click the task you have inserted, and selectInsert > Program
instance to add a program instance.
11. Right-click Libraries and select Insert > Firmware Library, select
MODBUS.FWL. Then click Include.
12. Right-click Data Types and select Insert > Datatypes. In the pop-up
window, enter the Name and click OK.
13. Double-click the data type you have inserted and define an array in
worksheet shown as below as an example, then click Save button
from the toolbar. Click Make.
Chapter 6 - Communication
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