6/20/2013 7:30 PM | |
Joined: 9/27/2006 Last visit: 10/17/2024 Posts: 12289 Rating: (2687) |
Hello Piscean; The amount of registers reserved for PKW and PZD data in a Pofidrive profile is determined by the PPOx (Parameter Process data Object) selection of the Profibus slave configuration for that drive. There are 5 PPOx selections available for a Micromaster 4 drive, for example, PPO1 to PPO5. The attached table shows thereservation of registersfor each possible PPOx. See chapter 3 of the following document: Operating Instructions: MICROMASTER PROFIBUS Optional Board You can see in that table that PPO3 reserves no registers for PKW data (parameter values) and 2 words for PZD (process data): total 2 words. Since the HWConfig give you a reservation of only 258..261, it onlyreserves 2 words IN and 2 words OUT for Profibus exchanges for your drive, so I must conclude that since all other PPOx need more registers you are using PPO3. Therefore you only have access to the Control Word (start and stop bits) and a speed reference, and that you can do no parameter change over Profibus-DP. Hope this helps, Daniel Chartier |
Last edited by: O_Moderator at: 6/21/2013 12:08 PMLast edited by: dchartier at: 6/20/2013 7:32 PM |
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This contribution was helpful to2 thankful Users |
6/21/2013 7:45 AM | |
Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877) |
Hello Daniel, As per your suggestions I found out PID258 & PQD258, both in OB1. However I am unable to inetrpret those, means how are they read & write. Kindly find attached here with the back up of PLC logic for your ready reference. Can you help me to find out this? With thanks & regards, DEEP. AttachmentD:\TACCHI DHD 04042011\Programe.zip (380 Downloads) |
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