Industry Online Support
Technical Forum
1/28/2010 2:56 PM | |
Posts: 9 Rating: (1) |
Hello All I have Profibus communication between Masterdrives and PLC. It is configured in hardware configuration as folowing: - PKW: 4 - PZD: 6 Detailed screenshoot you can find in attachment (PZD1.jpg). I want to extend PZD words to 10 but as soon as I change configuration the comunication fails (I change length value from 6 to 10). The only way it works is to add extra line with additional 4 PZD words (PZD2.jpg). Why I can not extend PZD word in the way I described? This is more interesting because some drives in the project have 10 PZD words in one segment and it works correctly. Best regards, macio AttachmentDP_communication.zip (234 Downloads) |
1/28/2010 4:53 PM | |
Joined: 9/27/2006 Last visit: 4/22/2024 Posts: 12257 Rating: (2665) |
Hello macio; I do not know why you cannot extend the number of PZD words in the manner you wish. But if in your Configuration tab you select PPO5 as default configuration, you will get 10 PZD words. PPOx is the mane given to the 5 basic telegram structures for drive communications, as per the original Profibus drive profile. Siemens (M'icroMasters, MidiMasters and Mastwerdrives, Simoreg), Danfoss and other manufacturers implement this communication profile in their drives. You can see the 5 PPO types available in the attached illustration; PPO5 gives you 4 PKW words (for parameter transfer) and 10 PZD words for data transfer. Maybe the following link can be of service for yopur original problem: it sdiscusses extending the PPO5 telegram to use more than 10 PZD words in a Masterdrive configuration, with Drives-ES. /tf/WW/en/Posts/32602, Hope this helps, Daniel Chartier |
Follow us on