9/9/2024 7:32 PM | |
Joined: 7/4/2024 Last visit: 9/9/2024 Posts: 24 Rating:
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Hello everyone, I am currently working on a project where I need to control a SEW EURODRIVE motor using its variable frequency drive (VFD) via Modbus RS485 communication. I’m using a Siemens S7-1200 PLC and have configured theMB_MASTERblock in TIA Portal to communicate with the VFD. My goal is to send commands for forward, reverse, and stop to the VFD. However, I am struggling to identify the correct addresses for these actions in theMB_MASTERblock. Here’s what I’m looking for:
I have consulted the "MOVILINK Protocol_Modbus RS485" (https://x0.at/pYY7.pdf) documentation, but I am having difficulty determining which addresses to use for these actions and whether they are bits or HEX registers. I’ve also attached screenshots of my ladder diagrams to give an idea of the current setup. I tried to issue a right rotation command based on the documentationon page 4, which indicates that 4000hex = +100% for right rotation. I attempted this in writing mode by setting MODE = 1 and DATA_ADDR = 4000hex (16384 in decimal) + 400001 = 4163845, as shown in the attached screenshot. Could you please confirm if this approach is correct? Has anyone had experience configuring and controlling SEW EURODRIVE motors via Modbus RS485 with Siemens PLCs? Any guidance or insights would be greatly appreciated! Thanks in advance for your help. |
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