Hi, Good Morning, I have the some issue to read data from Modbus RTU Slave using AXL SE RS485. When I try to connect to the RS485 Slave, the MB_RTU_FC4_7 Function Block which is intended for read input registers is not active when I give TRUE signal to the xActivate (see picture below). I check all the parameters including the Baud rate, Slave ID, Parity, Data and stop bits match already. Do you have any experience on this topic? Thanks.[attachment]1.png[/attachment][attachment]2.png[/attachment][attachment]3.png[/attachment][attachment]4.png[/attachment]
Unfortunately we are not able to reproduce this error. It may be that something else in your application is causing this problem. With your permission, we can send an email to the address you used to register on this forum, with instructions on where to send your PLCnext Engineer project. We can then check the project for problems. Alternatively, you can contact the developers of this library directly, using the „Contact“ button on the product page in the PLCnext Store.
Hi Martin, Thanks for the reply. Yes you can send the email to my email address on this forum.
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Solution: The InOut variable udtMBData has to be the same variable on all FBs. In your project you use two different variables. (ref: #219064)