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Considerations for multiple G120c drives on bus

3/10/2023 10:26 AM	Rate (0)
robbie c Experienced Member Joined: 8/2/2021 Last visit: 5/14/2025 Posts: 91 Rating: (4)	Hello friends, countrymen and romans, I'm planning a large overhaul of a factory floor control system S7-1511 pn CPU controlling 15 G120C drives on the same bus through use of Technology object speedaxis control I have done similar projects on a smaller scale i am wondering if there are any general considerations i should make or things to look out for? warmest regards
	Changing random lines of code in your program until it works is "hacky" and "bad practice" but if you do it fast enough it's machine learning and pays 4 x your salary
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3/12/2023 8:57 PM	Rate (1)
cliff.pennalligen Bronze Member Joined: 7/25/2017 Last visit: 12/10/2025 Posts: 364 Rating: (59)	The SpeedAxis control TO may consume excessive resources for 15 drives. I haven't tried that number of the TO myself, but our local Sinamics product manager said using the Sinamics speed FBs is more computationally efficient, and gives you (approximately) the same functionality. If you choose to use Sinamics FBs, there are couple of options: The standard SINA_SPEED, which can be dragged from the instruction list here: SINA_SPEED_TLG352, which is available here: https://support.industry.siemens.com/cs/document/109801698 The advantage of SINA_SPEED_TLG352, is that you can read alarm codes, torque and current from the drive.
	Last edited by: cliff.pennalligen at: 03/12/2023 20:58:25
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3/13/2023 5:21 AM	Rate (1)
Mister T Silver Expert Joined: 4/28/2015 Last visit: 12/5/2025 Posts: 400 Rating: (60)	Hello, maybe this is also helpful for you: SINAMICS SDC: Serial Drive Commissioner https://support.industry.siemens.com/cs/ww/en/view/109774753 Drive Technology Commissioner (DTCom) https://support.industry.siemens.com/cs/ww/en/view/109779879

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This contribution was helpful to 2 thankful Users cliff.pennalligen BoletusEdulis

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