Pago

PMCR, I never used or even payed attention to that PLC setting. I'll explore. In this case project 5ms would be a less impact but for the most of my projects any 1ms could have a huge impact. About the your costumer problem, it depends how the SCADA architecture is implemented. In that case i would have only two PC comunicating with the 10 PLC's. The other 28 PC would work as client of those 2 configured as SCADA Servers. With this situation the information would be concetrated and redundant to all PCs on the system. The network traffic would be the same but the payload on the network would be distributed. The other point would be the type of the protocol used. Since TCP generates de twice the traffic needed i'd use UDP protocol (no response). But this is a point of view whithout details of the architecture. Kind regards, Pago

Hi, I've been very busy with no time to maintain my posts, so my appolegies for feedback only today. So today i'm getting some of my posts on forums updated (i guess it's deserved for all good knowledge of us. About all this post, PROBLEM SOLVED (long time ago.hihihi!). How...? Well the main problem was the number of PLCs and the OMRON OPC Server. I've detected alsom somme packet loss/fails wich could be the reason for Bad Qaulity data on OPC client. Instead of OMRON OPC Server i've tested Kepware OPC server with OMRON suite's and worked fine. OMRON has a limitation of 32 devices per channel, limitation wich is not configurable on OMRON OPC Server (as far as i know). On Kepware's i've created five channels each with a different UDP Port number. I distribute the devices for these channels. With this i needed no special changes on variable scan times. Are a lot of variable and most of them with one second scan time. The network has no significant load. All keeps work fine till today. In fact i've having some issues on comunication between PLCs with send/receive commands. some time i get some error. I guess this could be some routing time trouble and packets could be discarded and consequently originates the timout error. I need to spend some time on it but the day only has 24 hours. Thanks for your interest Regards, PAGO

Hi, I've been very busy with no time to maintain my posts. So today i'm getting some of my posts on forums updated. About all this post, PROBLEM SOLVED (long time ago). How...? Well the main problem was the number of PLCs and the OMRON OPC Server. I've detected alsom somme packet loss/fails wich could be the reason for Bad Qaulity data on OPC client. Instead of OMRON OPC Server i've tested Kepware OPC server with OMRON suite's and worked fine. OMRON has a limitation of 32 devices per channel, limitation wich is not configurable on OMRON OPC Server (as far as i know). On Kepware's i've created five channels each with a different UDP Port number. I distribute the devices for these channels. With this i needed no special changes on variable scan times. Are a lot of variable and most of them with one second scan time. The network has no significant load. All keeps work fine till today. In fact i've having some issues on comunication between PLCs with send/receive commands. some time i get some error. I guess this could be some routing time trouble and packets could be discarded and consequently originates the timout error. I need to spend some time on it but the day only has 24 hours. Thanks for your interest Regards, PAGO

If there's no routing and if you ping to the ip tha it replicated the the ping response can comes from your PC and not the PLC that's why you have ping replies. Are you using some kind of VPN? If so what type of equipmente is your VPN server? Regards,

I probably will try the timeout time option. I've made some tests and detected the problem was defenitively on the OPCServer. I used another OPC Client than iFix and the same item have the same quality on different clients. Now i'm testing another OPC Server. I know that i will have three times the work to do tha was previously done but.... I really need and want to get off this problems. The project is depending on this. I'll give you new aout the final solution if you want to. Regards,

Hi! I'm using GE Fanuc iFIX 4.0 and OPC powertool as client. As OPC Server i'm using OMRON. I matter fact i have no error identified on error log but i have bad data quality detected on OPC Client side with no errors, just bad quality intermitent from good to bad and vice versa. Hope someone can help me on this. Regards,

Well, Actually there are no ETH errors as far as i detected only one PLC has errors in ETN21 error log (0107 remote node not found on network). Bandwidht i can assume that's enough, it is work at 100MB and with an occupation on PC about 0,5% maximum i detected. I need to monitor all this because i'm having some comm faults (without error notification), on my SCADA OPC Server/Client. regards,

Hi, I'm using ETHERNET. In matter fact there are error bits but what i really need is to send an email notification with error log attached every time that a certain error occurs. The other thing that i need to monitorize are the comunication packets between PLCs that are using FINs. need some tips on this, Regards,

Hi all, I've about 200 PLC's connected via an IP FINs network. I'd like to debug the FINs network packets and/or detect any problems on it. I'm having some comunication problems. i'm using OPC Server too and would like to trace the response of this one to PLCs. Can someone tell me how can i view or debug FINs packets on my network? Best Regards, Pago

Yes, i guess. I'm still working on it. but if it really works i'll notice you. The main problem is, as far i discovered, the configuration on SCADA OPC Client tool (power tool). I've configured one server for each building architecture level (seven). I though this could be a way to find out the solution when i saw 7 clients connected to the server. Now i'm configuring all item on OPC Client tool subdjacent to one unique server. So far so good. Thanks for your interest Regards,

Well, this a solutions that i've thinked before as a temporary workaround. But i had somo problems to access remotely to OPC Server with OPC client (maybe some DCOM permissions weren't working). But answering, nop, multiples PCs wouldn't be possible. I have only a dedicated Clustered server with about 5 GB RAM and aneough Hdd space to runs my SCADA and SQL Server too. regards,

Let's see. But this would be only part of the solution. It doesn't resolve all my problems. Send/Receive would be useful to concentrate on one PLC data from 64( or 68) PLCs only. I'm finishing the FINS network configuration. Hope during this week i can test comunications with this configuration. But i'm a bit "Hopeless".

The solution wasn't provided by me (I just have to implement it). That would be a good chance to dispense a few PLCs (Some of them are really needed by cable path reasons). But now that's an impossible solution to be implemented. I really need to solve this one. I've the intention, as lons as possible, to have some concentrator PLCs using send/receive commands and on this case i cloud "eleminate" some PLCs from OPC Server. For now I couldn't have Send/Receive commands working. I Really need a solution for this and i didn't find it...yet! Regards,

Hi fredrix, Yes, i'm reading all PLC from just one Single Server PC and only one OPC Server. About 30 tags, aren't only 30 tags per PLC. Why so many PLCs. Well this is a BMS application and some PLCs had to be instaled on strategic points for major reasons. As SCADA i'm using GEFanuc iFIX 4.0! About the solution any tips? By the way now i'm trying to reconfigure FINS networks and nodes on all PLCs. regards,

In a matter fact 200 are only "my" PLC's. I will have to interact with other ones on other networks by OPC Server or/and Send/Receive commands. I have more than 6000 Scada tags but these come from about 670 arrays configured on OPC Client/Server. About the update rate i guess i've it well configured. The different types of variable are grouped and most of them with asynchronos option (i've tested with Synchronos) and thos who are not, have an update rate between half a minute to a two minute update rate. I've tried these with shorter times and with other configurations but....nothing. Really need some help on this. Another sugestion for quick implementing for thi structure? Regards,