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