on 05-23-2015 5:10 AM
Hi Steve
I am working on a project "Plant dash board using MII" and also various other things integrated with SAP MII such as:
1. At the time of good entry vehicle weigh bridge & security cameras integrated with SAP.
2. Biometric attendance system integrated with SAP.
3. Shop floor machine PLC are integrated with SAP though OPC kepware to view real time status of shop floor.
My major concern is SAP PCo agent link goes down automatically down and both OPC and MII stops communicating with each other. I have checked the license it is perfectly fine and both m/c are pinging with each other. Please tell me what could be the possible reason.
Regads
Vivek
[Discussion was branched from old Discussion in 2012]
Message was edited by: Michael Appleby
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Hi Hasila,
What about the OPC Server? This error is very explicit; there is a break in the connection between Agent Instance and the OPC Server. Please confirm that the OPC Server is operating correctly.
Did you apply the version and patch updates to PCo and the OPC Server as recommended?
Regards, Steve
Hi steve
Last time we changed the OPC retry counts settings as you suggested. There after it worked perfectly fine for more than 2-3 months. Now again we are in trouble. This time OPC & MII Connection is okay but OPC is returning status bad for the tags despite of OPC quick client showing status good of PLC and real time values are updating in it.
What could be the problem.
Please Help... Thanks....
Hi Vivek,
Note that QuickClient uses OPC DA connectivity to Kepware but you are using OPC UA between PCo and Kepware, according to the previous messages. BAD tag status could still be a connection issue between PCo and Kepware over UA.
Regards, Steve
HI Steve
1. OPC tags status is always good for machines which are running, off course status is bad for few machines which are under shutdown. The PLC's are not communicating as their power is off.
2. In kepware error message comes when machine is under shut down as at that time PLC is also Off. Message is like this
"9/11/2015 10:05:45 AM Warning Siemens TCP/IP Ethernet Device 'Acid Filler-2.PLC1214' with ID 10.10.75.13 is not responding."
3. PCo is not generating any logs giving error
4.No I haven't. Please provide link, where i can get latest Service Pack, procedure to patch details etc.
With warm regards
Vivek M
HI Vivek,
What is a normal or expected time that a machine can be down and not available for communication?
Regards, Steve
Hi Steve..
How are you doing?
The latest logs i have seen and found an hex code of server error, description of the same is as:
Date Time Level Source Event
9/18/2015 10:32:41 AM Error UA Server Error: Registration with Discovery Server failed [ret=0x80af0000]
Please suggest what could be the problem..
With warm regards
Vivek
Hi Vivek,
Can you provide screen shots of your PCo OPC UA Source agent configuration?
One thing we cannot prevent is receiving BAD quality when MII is trying to query a tag that was previously Good before the PLC was shut down. This is normal behavior for an OPC Server communicating with an OPC Client. You can detect the status of a Kepware channel or device from the _System group tags defined by Kepware, and these could be used to define some conditions on when you process tag data.
Regards, Steve
Hi Vivek,
First, some questions:
Regards, Steve
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Hi Steve
First of all thank you for your prompt response.
I am answering to your queries,
1.PCo version is 2.303.1737.352
MII version-"sap mii Copyright 2009 SAP AG. All Rights Reserved. 14.0.3 build(29)".
2.Kepware Server version: v5.13.191.0
3.We haven't purchased license for data logger but for OPC communication server and PCo it is there.
4.Yes both servers are on different machines.
5.Machines are running on the shop floor, status is also updating on webportal, but some time in the day it stop fetching the data and when we tried to reconnect. A message displayed"OPC Server" not reachable. Than we checked in PCo Management console against PCo agent a X (Cross mark appear in front of PCo agent name instead of green bullet,sign of healthy status). Then we restart the PCo manually in window srever using services.msc and thereafter everything start working fine.
This is going to effect the quality of reports we are getting in our dashboard, and putting serious threat on authenticity of reports.As the time for which the servers are not communicating with each other at that time there is lapse in data. And there is difference between actual figures and system generated one.
Regards
Vivek M
Hi Vivek,
Regards, Steve
Hi Steve
I gave a continuous ping command between these two machines and i didn't see any break so we can rule out networking problem option. Secondly as you said reliable connection setting are same as by default settings,"3retries with 30 sec delay".
I am trying to extract Instance Log but a pop up message is coming " Can not query agent log [there is insufficient disk space to complete the action]".What could be the reason for this as there is ample space on server.
Please tell me more about how to disable kepware data logger plugins.
Regards
Vivek M
Hi Vivek,
Regards, Steve
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