8/6/2015 11:08 AM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hello SD, I don't know if you can without any module on PLC side (S7-1200), and you have connected on 14 P+ and 15 N- on Micromaster side not 13&14 right? I never tried S7 1200 and MM4xx with USS but try to read this thread perhaps might help you: S7 1200 Communication with micromaster 420 using USS ... |
Last edited by: Ste39 at: 8/6/2015 11:27:22 AMLast edited by: Ste39 at: 8/6/2015 11:28:18 AM |
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8/18/2015 8:39 AM | |
Posts: 33 Rating: (7) |
i think you need an extra step. The drive uses the siemens USS protcol over the RS-485 link. an adapter like this is what you would need to do what you want: http://www.anybus.com/products/products.asp?PID=404&ProductType=Anybus%20Communicator This would speak the right protocol over the serial link so the information you pass it would be interpereated properly. otherwise, you will have to construct the proper USS protocol packets and utilize an open tcp connection to the moxa device from the s7-1200 and send the data. here is a description of the USS protocol. another possible way to do this would be to get the RS-485 communication board that sticks into the front of the PLC. they are cheap and you can then use the built in USS communication blocks in TIA portal. |
Last edited by: natenut at: 8/18/2015 8:40:56 AMLast edited by: natenut at: 8/18/2015 8:42:13 AMLast edited by: natenut at: 8/18/2015 8:46:04 AM |
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