Dear All,
I have 3 Interface ( Modbus Serial Interface) which is getting data from Energy Meter Through DCU. Each COM port is separately connected to individual Energy Meter. And Interface are on different node.
I have created 74 Tags for each Interface instance. Regardless of water scan class I map it up. its skipping scan class and all 3 interface are updating in frequency of 18 secs.
Following things have been performed.
1. Check the rate of frequency of data update through ModScan32 software and data is coming through seamlessly very second.
2. Modified scan class with offset - no luck
3. Reduced the poll delay and response timeout - no luck
4. Upgraded to lasted version of ICU and PI Modbus - no luck
5. Seggrated 74 tags with 40 tags with scan class 3sec and 34 tags with scan class 5sec
6. Tried to map 1min scan class but still its updating in 18 sec time range.
7. Disabled Buffering as well.
SDK Log files are showing error as,
Time ID Severity Message 5/6/2014 2:43:31.94501 PM 7039 Information Connection accepted: Process name: PISDKUtility.exe(3364) ID: 1450 5/6/2014 2:38:05.07001 PM 4 Information . 5/6/2014 2:38:05.07001 PM 43474 Warning Timeout cleared on COM port 11 Node ID 1. 5/6/2014 2:38:01.52301 PM 4 Information . 5/6/2014 2:38:01.50801 PM 43473 Warning Timeout on COM port 11. Retries failed while trying to request data from Node ID 1. 5/6/2014 2:37:28.13301 PM 4 Information . 5/6/2014 2:37:28.13301 PM 43474 Warning Timeout cleared on COM port 6 Node ID 1. 5/6/2014 2:37:24.50801 PM 4 Information . 5/6/2014 2:37:24.50801 PM 43473 Warning Timeout on COM port 6. Retries failed while trying to request data from Node ID 1. 5/6/2014 2:36:52.07001 PM 4 Information . 5/6/2014 2:36:52.07001 PM 43474 Warning Timeout cleared on COM port 5 Node ID 1. 5/6/2014 2:36:48.52301 PM 4 Information . 5/6/2014 2:36:48.50801 PM 43473 Warning Timeout on COM port 5. Retries failed while trying to request data from Node ID 1. 5/6/2014 2:26:10.423 PM 43479 Warning 1 device(s) failed all of their retries while requesting data. 5/6/2014 2:25:37.97 PM 4 Information .
Can you please advice on the above issue please?
Regards,
Yasin - Sr.Engineer - OSI PI Automation Engineer