Lakshmi

Difference in performance of 32k and 16k plcs on same SCADA

7 posts in this topic

Hi all,

Does anybody have experienced problem with communication while connecting  32k and 16k plcs to same SCADA via factory talk linx?

 

Does anybody have got problem with communication while RSView32 and FTView were used simultaneously with same plcs in different pcs with different shortcut names?

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Lakshmi requesting some clarification please?

     1) Can you specify what you mean by 32K and 16K PLC? 

     2) What catalog number processors are you dealing with?

     3) What communication protocol are you using? DH+, DH485, Serial, Ethernet?

     4) Describe what means using RSView32 and FTView simultaneously to same PLC.  Is this PC1 running RSView32, PC2 running FTView and both looking at PLC1?

Your models and specific case will help clear things up, but first thought is you're swamping the comm overhead time slice and/or exceeing the permitted connections count,

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Thanks for responding..so the details are like..

1)Iam using two processors 

1.SLC 5/03 L432E OS302FRN 10 &later which is having 16k memory

2.SLC 5/03 L533E OS302 FRN 10 & later which is having 32k memory

2)Catalog number:1747 L532 & 1747 L533

3)Iam using Ethernet protocol

4) currently it is running like RSView32 in pc1 & ftview in pc2 seeing same above processors.

Even when Pc1 is turned off and using only Factory talk view,I can see both plcs in Factory talk linx,but online tags and graphics are available only for L532 processor.

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Hmmmm....

The SLC 5/03 does not support Ethernet. The RJ45 connector is for DH485, not Ethernet. I would be curious to see what driver you're using in RSLinx to be able to see them. Are you using some sort of gatway device? If so, please share. I have some SLC500 fixed I/O processors (DH485-only) that I would love to be able to network.

 

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If you're using a DF1/Ethernet interface like the 1761-NET-ENI, it's possible that there is a configuration problem with it (like the Subnet Mask or Default Gateway) or that you have exceeded its capacity to accept incoming connections.

In general, both FactoryTalk Linx/RSLinx Enterprise (for FactoryTalk View) and the RSLinx Classic drivers (for RSView32) can simultaneously connect to any controller;  the memory size of the controller is not a factor.

But the connection capacity or configuration of the network interface device might be an issue.

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Yes,I am using a 1761 NET ENI series D  module with each processor .

So how should I configure the NetEni module so as to get a proper communication?

 

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The Net-ENI can handle up to six incoming TCP connections.    It's possible that if you are connecting to it with too many computers, you have overloaded it.

I don't think the Web interface allows you to see the number of TCP connections;  I don't have a Net-ENI Series D to test on.    I do know that you can connect via Telnet to the device and send some commands to get some status data.

Here's a Rockwell Knowlegebase article about how to do that (TechConnect required):  KB 27418.

One common issue is that an RSLinx Classic station with an RSWho browse open will create and maintain a connection to a Net-ENI, so it's possible that in a large enterprise network that you have computers that are just running RSLinx in a background window that are taking up resources on the Net-ENI.

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