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Positioning with S7-200 or 300 via USS?

Created by: Rasmus7700 at: 7/19/2008 6:21 PM (9 Replies)

7/19/2008 6:21 PM	Rate (0)
Rasmus7700 Posts: 6 Rating: (0)	Hello I was wondering if there exists any positioning blocks, that communicates with the g110 via USS? I can only find blocks that uses 2 digital out, or analog out. Thank you :)
Rasmus7700 Posts: 6 Rating: (0)	Last edited by: Rasmus7700 at: 7/19/2008 6:22 PM
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7/21/2008 11:33 AM	Rate (0)
Hulzhex Gold Member Joined: 8/25/2005 Last visit: 10/5/2024 Posts: 1162 Rating: (111)	Hello Rasmus7700, I have no experience with your application. But searching through the Techncial Forum, there are more threads about that I think. For example this one: USS and S7-300 in contrast to S7-200 Maybe it will be helpful? Best regards Sabine

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7/22/2008 10:14 PM	Rate (0)
Rasmus7700 Posts: 6 Rating: (0)	Yes i also read that post. So it's possible to use the USS bus on both cpu types. I've also found the librarys for setting up the communication port. I was wondering if there exist any libraries for positioning with the USS protocol. I've found some position libraries for the 200 plc, but they use digital outputs. Anyone can help me :D
Rasmus7700 Posts: 6 Rating: (0)
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7/28/2008 3:24 PM	Rate (0)
Lifrasil Bronze Member Joined: 9/29/2005 Last visit: 11/15/2024 Posts: 313 Rating: (24)	Hi, maybe this application helps you to understand how to use USS protocol on s7-200 side. http://support.automation.siemens.com/WW/view/en/21690362 here you can order the most actual USS libraries (for both ports) https://mall.automation.siemens.com with this MLFB: 6ES7830-2BC00-0YX0 Detailled information regarding USS you find in the S7-200 manual http://support.automation.siemens.com/WW/view/en/1109582 from chapter 11 regards Lif

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8/22/2008 4:07 PM	Rate (0)
GerardAmmerlaan Posts: 60 Rating: (1)	HI Rasmus, I suggest using the standard blocks with analog out and combine it with some USS standard blocks, ie use the output from the positioning block as input for the USS block. This should probably work. Gerard
GerardAmmerlaan Posts: 60 Rating: (1)
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8/22/2008 8:59 PM	Rate (0)
Rasmus7700 Posts: 6 Rating: (0)	Off course, that sounds like an idea i can use :) Thx Alot :)
Rasmus7700 Posts: 6 Rating: (0)
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9/11/2008 1:57 AM	Rate (0)
marcsinclair Posts: 49 Rating: (5)	Hi, I've used scores of Micromasters with the S7-200, you'll need the USS library as this provides a simple interface from one of the CPU ports. The Low-cost G110 drives also use USS, but do consider the MM420, as it is only slightly more expensive, but is a much better quality, and easier to connect, and has all the hardware for EMC compliance. I've used USS drives with geared motors, feeding back through an encoder for positioning (using the encoder input functions on the CPU) This work well, and with a suitable mechanism can be _very_ accurate. Regards
marcsinclair Posts: 49 Rating: (5)
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Here is a module that can be used with USS in S7300 in an ET200S station

SIMATIC DP, ELECTRONIC MODULE FOR ET 200S, 1 SI SERIAL INTERFACE ONE CHANNEL, 15MM WIDE RS232/422, 485 MODBUS/USS

9/16/2008 11:31 AM	Rate (0)
miami Platinum Expert Joined: 8/31/2005 Last visit: 11/13/2024 Posts: 2198 Rating: (328)	For S7-200 ther are some nice positionioning function blocks. I do not know if they work with USS too, but I think so. Look here: http://support.automation.siemens.com/WW/view/en/21063595 If you deside to use a S7-300, you can use Easy Motion Control (6ES7864-0AA00-0YX0) for positioning. I avaible you soulduse PROFIBUS, it's much faster then USS, the positioning will be better. Examples for EMC you can find here: http://support.automation.siemens.com/WW/view/en/20208582/136000&cssw=4

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9/16/2008 12:15 PM	Rate (0)
Rasmus7700 Posts: 6 Rating: (0)	That seems good, problem is that i've already installed a S7-200 PLC. My drive's up and running. BUT i can't do any kind of positioning with this bus, it's way to slow, the reaction time is about 1,5-2 sec (not ms) That's a big problem... :(
Rasmus7700 Posts: 6 Rating: (0)
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