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Technology object TO_positioningAxis with S120 (CU310) and external encoder.

Created by: gigi_plc at: 10/19/2018 3:58 PM (13 Replies)

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10/22/2018 10:25 AM	Rate (0)
ChristophD Grandmaster-Expert Joined: 5/12/2006 Last visit: 3/20/2023 Posts: 21352 Rating: (2818)	Hello, this mean that the configured encoder can not be used with DSC (Telegram 105 and 106). Which encoder you have configured in the TO for the closed Loop? Or do you want to use the SMC30 encoder for that? Which encoder is on the motor? Regards Christoph

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10/22/2018 10:39 AM	Rate (0)
gigi_plc Bronze Member Joined: 12/14/2011 Last visit: 3/17/2023 Posts: 151 Rating: (11)	Hi, the motor is 1PH8 with HTL encoder inside but for the closed loop i use an incremental encoder connected to the SMC30 (encoder in contact with the material). So if i have understand this type of encoder can not use in combination with telegram 105 or 106?

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10/22/2018 10:51 AM	Rate (0)
ChristophD Grandmaster-Expert Joined: 5/12/2006 Last visit: 3/20/2023 Posts: 21352 Rating: (2818)	External encoder systems (except motor encoder) If, with DSC active, an external encoder is to be used, this requires the selection of a telegram with additional actual encoder values: Telegrams 6,106,116,118, 126, 138 or free telegrams. For optimum control in the DSC mode, the same encoder(s) (encoder 2 and/or encoder 3) must be selected for the control (master) and the drive via parameter p1192 "DSC encoder selection". If the encoder for the position actual value generation in the control and the encoder selected for DSC differ regarding their pulse numbers and/or fine resolution, then this must be taken into account in p1193. The factor represents the ratio of the pulse difference between the encoders used for the same distance reference. Further, it should be noted that for different encoders there are no dead times regarding their position actual value sensing (for example as is the case for EnDat encoders and SSI encoders), as this will otherwise lead to undesirable behavior. The effect of the parameters p1192 and p1193 is illustrated in function diagram 3090. https://support.industry.siemens.com/cs/ww/en/view/109754299

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This contribution was helpful to 1 thankful Users gigi_plc

10/22/2018 1:41 PM	Rate (0)
gigi_plc Bronze Member Joined: 12/14/2011 Last visit: 3/17/2023 Posts: 151 Rating: (11)	Many many thanks, so i have to select "position control in the PLC" as shown in the picture or insert the correct value in the parameter 1192/1193 and enable DSC. Now it is clear... i think..., many thanks to all. Attachment Immagine_b5.png (271 Downloads)

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