{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Welcome to the Schneider Electric Website

Welcome to our website.
Search FAQs
Video: How do I read data from a Modbus TCP device using the embedded Ethernet port on a Unity Premium PLC?
Issue:
Programming Modicon Premium PAC to Read Device Data via Ethernet Port

Product Line:
Premium, Unity Pro

Environment:
Unity Pro software

Resolution:



To read data from a Modbus TCP device using the Premium PLC with embedded Ethernet port , follow the steps below:
1. Create a Premium project with an embedded Ethernet port on the CPU
2. Create an Ethernet network under "communication" within the project browser
3. Double click on the newly created network and under the "IP configuration" tab, enter the desired IP address and subnet mask
4. Select the "messaging" tab and check the "XWAY profile" option.
5. Enter an XWAY address and IP address under the connection configuration section. The XWAY address comprises of a network and station number. The network number can be between 0 and 127 and the station number must be          between 100 to 163 for Modbus TCP messaging. Example of XWAY address is 1.101
6. Create a section and add the READ_VAR function block
In the example below, the Premium PLC is reading 5 words starting a 40400 in the remote device

READ_VAR (ADR := ADDR('{1.101}SYS'),
OBJ := '%MW',                           (* Type of objects to read for Premium PLC: '%MW': internal words *)
NUM := 400,                              (* Index of the first object to read. *)
NB := 5,                                      (* Number of objects to read. *)
GEST := %MW50:4,                  (* Exchange management table *)
RECP => receive_buffer);          (* Word table containing the value of the objects read. The length of this array must be greater than or equal to NB*)

%MW52 := 20;  (* The third word of the management table is managed by the user which defines the maximum response time using a time base of 100 ms.*)

If this FAQ did not solve your issue, you can chat with us at chat with us or e-mail us at customer.services@se.com to create a case with our Technical Support Team.

If you are not located in North America, please contact your local Customer Care Center for assistance:

Support | Schneider Electric Global (se.com)

Schneider Electric Canada

Explore more
Range:
Articles that might be helpful Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range: