8/4/2010 10:01 AM | |
Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11) |
Ercan, You have 3 items to look into: 1. Profibus connection 2. AC Drive 3. PLC program Profibus If there isno detection for profibus connection in the plc code, you can check the fault history under "Module Information" under "Diagnostic/Setting" to see if CPU has detected any problem on the profibus. AC Drive If the AC Drive doesn't have any display that you can check the drive parameters and check faults on it, check the plc code and see if any fault bit or fault code is read from drive then you can go from there. Otherwise you better config your drive so it can pass its alarm to CPU. PLC program If Profibus or Ac Drive are not the cause of the problem, there is a possibility that the plc code has a bug which causes the AC drive to go into stop mode. Regards, Behnam www.sigmaprocess.ca |
8/5/2010 6:12 PM | |
Posts: 71 Rating: (0) |
CPUdiagnostic buffer is inside of the attachment AttachmentDiagnose.zip (862 Downloads) |
8/6/2010 3:44 AM | |
Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11) |
Ercan, Post a copy of the Hardware configuration of the PLC here. That will help us to diagnose your problem better and tell you about those slaves which are casuing problem. Regards, Behnam www.sigmaprocess.ca |
8/6/2010 8:27 PM | |
Posts: 71 Rating: (0) |
13 and 14 stop but Nowadays, only 14 stops. thnks |
8/6/2010 8:29 PM | |
Posts: 71 Rating: (0) |
another view |
8/7/2010 3:51 AM | |
Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11) |
rcan,
Regards,
|
This contribution was helpful to1 thankful Users |
8/7/2010 9:19 AM | |
Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11) |
Ercan, 1. When you have profibus error on node 14, does that affect the other nodes? 2. Do you get error on other nodes too? 3. Does the AC drive detect losing connection to Master CPU? 4. Does the profibus connection recovers on its own? Regards, Behnam www.sigmaprocess.ca |
8/9/2010 9:48 AM | |
Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11) |
Ercan, It is recommended to use RS485 Repeater for cables longer than 200m for 1.5Mbps baud rate and cables longer than 100m for 3 Mbps to 12 Mbps. Long cable maybe an issue in your case but so far you have only problem with the last node. There is a possibility of having loose connection either on Node13 or Node14 connectors. There might be something wrong with the Profibus cable between Node13 and Node14. If you can do the following test, it will help to figure out the issue: 1. Add a dummy Profibus node after Node14 an make that one as the last one. This requires changing hardware config and downloading it which may not be appealing. 2. Take a profibus cable from Node14 back to Node13 and make Node13 the last node. If still Node14 goes down then issue is with the drive connection If both nodes go down, it maybe the cable from Node13 to Node14. Regards, Behnam www.sigmaprocess.ca |
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