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Sinamics V90_MDI Speed is not Writing by MB_Master FB block in S7-1200

Created by: counter at: 8/9/2017 9:49 AM (8 Replies)

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8/9/2017 9:49 AM	Rate (0)
counter Posts: 46 Rating: (1)	Hello Attached is the TIA program for Position control of Sinamics V90 Drive. I tried to run the Drive with Control word but Position is reaching with Very low speed. I tried to Change the MDI speed by writing the Register 40932-40933 through NW1 of OB1. but nothing is changing in p2691. Please advice..thanks Attachment MDI.zip (656 Downloads)
counter Posts: 46 Rating: (1)
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8/9/2017 3:54 PM	Rate (0)
Msorich Gold Member Joined: 6/28/2017 Last visit: 12/20/2022 Posts: 661 Rating: (40)	Hello, What is in the p0922 and p2079??? Cheers

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8/9/2017 8:56 PM	Rate (0)
@KB@ Silver Member Joined: 7/30/2012 Last visit: 11/28/2024 Posts: 335 Rating: (12)	Hello Have You Seen This Example... https://support.industry.siemens.com/cs/document/109480267/sinamics-v%3A-positioning-(ipos)-and-speed-control-(s)-with-a-v90-via-modbus?dti=0&lc=en-WW
	Last edited by: @KB@ at: 8/9/2017 8:56:52 PM
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7/26/2023 11:55 PM	Rate (0)
sudan1 Member Joined: 6/28/2022 Last visit: 3/12/2024 Posts: 4 Rating: (0)	Hi, I'm having the same problem... we followed the example and is the same result every time... it reach the position but at low speed... no matter what speed we set it seems like it take 1 min to complete a LU... Where you able to find a solution? Thank you.

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7/26/2023 11:56 PM	Rate (0)
sudan1 Member Joined: 6/28/2022 Last visit: 3/12/2024 Posts: 4 Rating: (0)	Hi, I'm having the same problem... we followed the example and is the same result every time... it reach the position but at low speed... no matter what speed we set it seems like it take 1 min to complete a LU... Where you able to find a solution? Thank you. counter Hello Attached is the TIA program for Position control of Sinamics V90 Drive. I tried to run the Drive with Control word but Position is reaching with Very low speed. I tried to Change the MDI speed by writing the Register 40932-40933 through NW1 of OB1. but nothing is changing in p2691. Please advice..thanks

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7/27/2023 10:41 AM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 12/12/2024 Posts: 5969 Rating: (820)	Hello, For the meaning of the single bits in the control and status word, please refer to Table 3-2, Table 3-3 and Table 3-4 in chapter 3.3. The reference speed (rated motor speed) is transferred in rpm. Values 6…32767 are possible. The speed setpoint and actual speed value are relative to the reference speed and normalized to the value 4000hex. For a motor with a rated speed of 3000 rpm that should run at 1500 rpm, the value 8192 must therefore be transferred. Positive and negative values are possible. The position values are transferred in LU (length units). They are a result of the axis geometry design and the gear ratio. Values -2147482648…2147482647 are possible. The MDI (Manual Direct Input) speed of the position setpoint is transferred in 1000xLU/min. Values 1...40000000 are possible. The MDI override values for acceleration and deceleration are transferred as percentages multiplied by 100. Values 10…10000, corresponding to 0.1…100%, are possible. For more detailed data information, please refer to the Modbus communication chapter in \14\. Positioning distance and positioning speed The state displayed in Figure 6-3 is the basis for the following three positioning scenarios. When a positioning operation is initiated from this state, the motor shaft rotates clockwise by exactly one revolution, which takes approx. 1s. Explanation:  Position setpoint “+10” means that the drive is to move 10000 LU in the positive direction. As the drive parameter p29247=10000 setting specifies that 10000 LU correspond to one load revolution and the p29249/p29248=1/1 gear ratio specifies that one motor revolution corresponds to one load revolution, the motor shaft must perform exactly one revolution.  MDI speed of position setpoint “600” means that the drive is to move 600000 LU per minute. According to the above information, this corresponds to 60 revolutions per minute or 1 revolution per second.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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7/27/2023 7:17 PM	Rate (0)
sudan1 Member Joined: 6/28/2022 Last visit: 3/12/2024 Posts: 4 Rating: (0)	Hi, Thanks for your answer... I notice this is the same info shown in the user manual... I checked more than one of the procedures and still have the same result. Speed control (S) works perfectly but we need IPOS (control position), and as I said before motor moves really slow (yes the position works and drives stop when reach setpoint), but no matter what MDI override value we set it moves to the same speed. I can see the PLC routine writing the value on the drive, but the drive speed is not responding, it seems like the drive is not using MDI for referencing set point. Do you have any idea? what other parameters should i check on the drive besides the one on the example? https://support.industry.siemens.com/cs/ww/en/view/109480267 Thank you.
	Last edited by: Jen_Moderator at: 07/28/2023 07:21:53 Link optimized.
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7/27/2023 8:01 PM	Rate (0)
sudan1 Member Joined: 6/28/2022 Last visit: 3/12/2024 Posts: 4 Rating: (0)	here the v assistance backup Attachment 2023.07.27.zip (746 Downloads)

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7/28/2023 1:08 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 12/12/2024 Posts: 5969 Rating: (820)	Hello, then do factory setting on drive, and do new configuration with right communication settings and Ipos.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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