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  1. Hi All, Networking guy here, looking for network experts on a AB PLC (1756-EN3TR/B v217021900) which seems to STOP ARPing for a device after 10 ARP's. The device is purposefully powered down, but when powered up, it can take minutes before the PLC sees it again. The PLC team says only changes in the PLC's logic are made. When an older backup is restored though, I do NOT see the issue somehow. 1) The devices that are powered down are back on the network and reachable within 10 seconds or so (ping). The initial thought was that they were not even on the network, but they are. Just that PLC shows a comms loss. 2) With the 'good code', the PLC, once the device is offine, keeps sending ARPs to find the device. The first one is a directed one, the subsequent ones are broadcasts. These broadcasts keep happening till the device is back online and is able to talk to the PLC again. 1st ARP after comms is lost: 474.423859     Rockwell_cf:a7:6c     Hilscher_2e:ea:08     ARP      60     Who has Tell Next and subsequent ARPs after the first one: 475.423471     Rockwell_cf:a7:6c     Broadcast             ARP      60     Who has Tell These ARPs keep happening every 1 second, till the device is online again. 3) With the bad code, the PLC, once the device is offline, sends only 10 ARP messages total and then stops sending ARPs altogethe . Then it takes 10 minutes* before it sends another one. If the device is backup online by that time, the PLC finds it right away. SO with these 2 different code bases, how is that a low level L2 protocol like ARP is impacted so much. The PLC team tells me that they have no idea and not set anything related to it. My question is where is the ARP network behaviour governed and how to change it? How can older code which supposedly only has changes in logic have different ARP behavior? * The 10 minutes interval might lead people to think it's a ARP timer and most likely it is, but then people usually ask about gratuious ARPS (garp) and I've verified that they make it through from the device to the PLC OK. If the device is offline for say a minute, the PLC mirrored port does indeed see the garps, yet at that point the PLC is no longer ARPing and regardless of that garp, it has to sit out the time till it sends a next ARP till it connects. Thus, I suspect the coming back to life process is governed by the PLC ARPing for it, and not by the detection of a garps. Thanks everyone!  
  2. Hi All  I'm struggling to a PLC using WAGO's e!cockpit software which I am new to.  In the network tab when I click to select "ETHERNET" from the "Scan Settings" area all that comes up is a drop down with "update selection" which does nothing.  As a result I cannot scan for the PLC's on my network. Has anyone got any ideas on this issue.  I'm running on windows 10, could that be a problem?     
  3. Hello all, i'm looking at installing a completely new network for our PLC system, using a ring topology. at the same time i would like to incorporate the IP cameras and VOIP into the same network.  each system is on a different sub net, PLC = x.x.1.x, Cameras= x.x.2.x, VOIP= x.x.3.x estimated camera traffic will be 25 Mbps, PLC 10 Mbps, VOIP no more than 1 Mbps  switches would be capable of 100 Mbps  question: managed or un-managed switches? if it is possible to use un-managed without affecting operations then this would be a massive cost saving    please only comment if you have practical experience implementing this  many thanks Dan  
  4. FINS over Network

    Hello. I'm trying to talk with different OMRON PLCs over network. You can do this using SEND(090)/RECV(098)/CMND(490). I can't find any FB using IP of destination PLC. From what I have read about FINS you only define: - Destination network number - Destination unit address - Destination node number The problem is, that I have the same node number in different IP ranges. For example: -          IP (PLC Node:10) - Master -          IP (PLC Node:50) - Slave -          IP (PLC Node:50) - Slave -          IP (PLC Node:50) - Slave How can I comunicate from master to slaves wich uses the same Node number 50? Where can I define IP Address of slave unit? I can see that Multiway is doing that without problems. Please help.
  5. Hi, I am doing a project with three Omron Cj2m cpu.  I dont know how to connect More than one Omron Cj2m Cpu Plc in a same network to communicate each other with a Internal Memory addresses. Can any one help me to understand?
  6. Trying to establish communication between an Omron CJ2M and DX-200 motoman controller.  IP's are both set at plc and robot.  Receiving an error on the CJ2M d6 with an error code of 01:0129.  Motoman's Eds is attached as well as the .nvf file for network configurator.  Struggling to figure out which side the mismatch is on.   Any help is greatly appreciated. 5067.nvf ST15_EIP_Ethernet_IP CPU_IO8.eds
  7. Anyone ever have this happen:   launch Network Config.. Go online, upload the devices that are there:                         The NJ, The NA HMI, and a Ethernet/IP Generic drive (The EDS has been installed) ..  that's what you see above ..Click OK , and a "NO" to start a new list ... and get:                                                                       Really .... DUH! .. where are the devices?                            Anyone have any idea why the 3 devices didn't show up on the network line?     Thanks much... Regards, Michael    
  8. Hi again I browse through half a dozen mitsubishi manuals but turn up nothing for mitsubishi plc cross-communication. In this project there are about six L-06 plc:s. All are on the same ethernet network already, communicating nicely with the SCADA system. Per today information is (temporarily) exchanged via the SCADA system. Here is another hole in my knowledge. Namely how to correctly setup communication between these plc:s. I plan to continuosly exchange some 50 bytes of information. I would be grateful for some pointers and/or perhaps a reference to a manual. Cheers to all of you //
  9. Hello guys, I have the following distribution in a profibus network: S7-315-2 DP(--> Salida del conector)1- Free DP connector2- RS485 repeater3- Periferia ET200S4- Periferia ET200S5- Periferia ET200S6- Periferia ET200S7- Periferia ET200S8- Variador MM440 (Cabinet C)9- Periferia ET200LENDS7-315-2 DP(<-- Entrada del conector)1- Variador MM440 (Cabinet A)2- Variador MM440 (Cabinet A)3- Variador MM440 (Cabinet A)4- Variador MM440 (Cabinet A)5- Variador MM440 (Cabinet A)6- Variador MM440 (Cabinet A)7- Variador MM440 (Cabinet A)8- Variador MM440 (Cabinet A)9- Variador MM440 (Cabinet A)10- Variador MM440 (Cabinet A)11- Variador MM440 (Cabinet A)12- Variador MM440 (Cabinet A)13- Variador MM440 (Cabinet A)14- Variador MM440 (Cabinet A)15- Variador MM440 (Cabinet A)16- Variador MM440 (Cabinet A)17- Variador MM440 (Cabinet A)18- Variador MM440 (Cabinet A)19- Variador MM440 (Armario A)20- Variador MM440 (Cabinet A)21- Variador MM440 (Cabinet A)22- Variador MM440 (Cabinet A)23- Variador MM440 (Cabinet A)24- Variador MM440 (Cabinet A)25- Variador MM440 (Cabinet A)26- Variador MM440 (Cabinet A)27- Variador MM440 (Cabinet A)28- Variador MM440 (Cabinet A)29- Variador MM440 (Cabinet A)30- Variador MM440 (Cabinet A)31- Variador MM440 (Cabinet A)32- Variador MM440 (Cabinet A)33- Variador MM440 (Cabinet A)34- Variador MM440 (Cabinet A)35- Periferia ET200S36- Variador MM440 (Cabinet B)37- Variador MM440 (Cabinet B)38- Servoamplificador E94AYCPM (Cabinet B)END What would be the best way to configure the network? As you can see I have more than 32 nodes in 1 segment and the RS485 repeater is not being used properly. Hope you can help me, Regards!
  10. CJ1M CPU11 how to set IP adress?

    Hello, I have to work now with a cj1m cpu11. I would like to connect it to a ns10 display. My first obvious problem is when i made the project in cx programmer, that unlike in cj2m i wasnt able to select the cpu unit in the IO table and set the ip adress. How do i need to set the ip address? im reading an omron guide, but it is confusing, and so long, i only want to set the ip address :/. Also how can i set the fins network to 2? On the cx-designer i set the network address:2 and the node adress:40. I know that the 40 means the end of ip address. Thats why i want to set the plc. How about the network address 2?  Help is much appreciated. Thanks!
  11. So here's the problem I'm facing. I've recently started working for a company that has two facilities. They have lots of old equipment/PLCs, plus some new stuff. We undertook a project to upgrade the network infrastructure, and replace all the old programming terminals (Some had Windows 2000!) with a new standardized programming terminal, all sharing a common image. We've installed these new computers, and they were working great. Recently, we switched all the licensing to a Hyper-V based server, using FactoryTalk Activation Manager. Right off the hop, there was issues with one of the sites (let's call it site B). Site A is working fine. When you open FactoryTalk Activation manager, it populates the activations from the server in about 1s. The wait times for opening software are pretty normal (For RSLogix 5000, "normal" isn't exactly rapid, but like I said, that's normal). For Site B, the activations take forever to refresh in Activation Manager when opened on a programming terminal. The software takes even longer to open (we're talking about 2-3 minutes). Network wise, Site B is further along than Site A. We've implemented a Stratix layer 3 switch at the top of the network and use area specific VLANs to reduce multicast noise across the network (much of the multicast noise comes from vendor equipment, not PLCs, so I can't control it). This works fine. I can remote in and use TeamViewer/VNC with acceptable performance across the network, so it's not being bogged down to unacceptable levels. However, connection to the activation server is unacceptable. I'm not sure of the culprit (yet). We are continuing network improvements, removing some older 10/100 links and installing Gigabit equipment between the Hyper-V server and the above mentioned Stratix, hopefully that might help. However, that same 10/100 link is the one I use to remote in and use Teamviewer currently, so I can't see how much improvement it will give us for activations (which really should take almost no network traffic). To get activations, I'm just adding the IP address of the Activation Server into FTActivation Manager on the programming terminals. Any ideas, people? Thanks
  12. Hi, I'm currently in a project where I'm putting up together a network where a CJ2M-CPU33 is reading the memory of 4 G9SP safety controller and communicating with an unchosen HMI. Since I'm new to Omron communications, I've decided to set up a network composed of only 1 CJ2M-CPU33 and 1 CJ2M-CPU31, both equiped with built-in EIP21 port, to help me understand the FINC protocol used to Read/Write and other commands from one PLC to another. I'm currently trying to use the CMND(490) function in the CJ2M-CPU33 to attempt and read part of the D memory in the CJ2M-CPU31 without success. I've tried many ways of sending the Hexa code to the PLC I'm trying to read the memory from but always come up with a 0401 end code (Service unsupported: Undefined command) or nothing at all when my Hexa code is really messed up. It's also good to know that the informatician of the company has succesfully read from the memory area but with his computer. I have provided with this topic an overview of my setup, settings and program in the PLC that is performing the CMND(490) function. I'd also like and take this opportunity to say that I really don't understand the settings in the FINS/UDP and FINS/TCP menu and when and how the PLC is using these protocols even if I've read tons documents on the FINS protocol. I find that that Omron's doc is complete but kinda lacks of setting and program examples. FINS_Problem_description.docx
  13. Version 1.0.0


    Opto22 PAC SNAP UP1 ADS read network settings using Linux or other OS using a serial port terminal app
  14. View File Opto22 SNAP UP1 ADS read network settings using Linux Opto22 PAC SNAP UP1 ADS read network settings using Linux or other OS using a serial port terminal app Submitter Absolutelyautomation Submitted 04/01/16 Category Other PLC Demo Software
  15. I'm having Allen Bradley PLC communication issue to a shared remote Rack. The Remote rack en2t card seems to reset. The Network path to it PLC to EN2t to N-tron switch to (Dell Managed Switch) to fiber converter to fiber to fiber converter to n-tron to remote en2t card I've found that when I replace the Dell Managed switch with a generic link sys switch. My I/0 OK Status light on the PLC will only blink 2 times a day compared to the Dell N3048 switch which will cause the status light to blink >500 times a day. I have fault code that runs in the PLC to determine what's causing the I/O fault and it Always points to the same remote rack. I've swapped fiber converters patch cables n trons en2t cards nothing effect it except the managed switch replacement...I haven't replaced the physical remote rack yet, cause I'm having trouble justifying it, since I get such a dramatic change when swapping the switch.     Anybody have any thought or ideas please provide... 
  16. Networking RS Logix 5000

    Hi all, Quick question about adding ENET modules to a plc. If I have a local network of a HMI, PLC and 1 device all on IP 192.168.255.x and I have another device across the plant with an address of 171.27.19.x, can I add that one device to the PLC and it will recognize it? Is there a way to add a device with a totally different IP address to a PLC that is already set up?
  17. Hello everyone, I need to modify furnace ladder diagram to take control of the upper PID limit. The temperature on the furnace is controlled using PID. There is master PLC CJ1GCPU45SP which communicates several slaves CJ1MCPU13. It looks that all the PID parameters are send from the master to slaves over DeviceNet using seven DRM21 modules installed on extension rack. I can see where the values for the PID are entered on the HMI and moved to new location in the master but I don't understand why they are not placed in memory locations used by DeviceNet by default as per DRM-21 manual ( which if I understand correctly are D30000 to D31599). Is it because the DRM21 are mounted on extension rack? I will list all the upper limit locations in master, it is a long list but hopefully will help in resolving this issue: HMI entry location Moved to location in the ladder D16401 __________________ D32023 D16403 __________________ D32047 D16405 __________________ D32071 D16407 __________________ D32095 D16409 __________________ D32323 D16411 __________________ D32347 D16413 __________________ D32371 D16415 __________________ D32395 D16417 __________________ D32623 D16419 __________________ D32647 D16421 __________________ D32671 D16423 __________________ D32695 D16425 __________________ D29923 D16427 __________________ D29947 D16428 __________________ D31723 D16429 __________________ D31756 D16430 __________________ D31757 D16431 __________________ D31758 After they are moved to the D3xxxx location they are not used anymore anywhere in the master PLC so I am assuming they are transmitted over to be used in slaves. Is my reasoning correct? How can I calculate address space used by each DRM-21 card to make sure I am understanding what is transferred where? Thank you.
  18. Hello all, I'm new to this forum, hope I will be able to get some answers on this forum. I'm wotking on maintanance for machines under productiona and I would like to conect one machine to my work PC. But when I try to setup conection with RSLinx, RSLinx don't see my PLC. Problem is that my PC is on network with IP addresses 192.168.8.XXX and machine is on IP address and between is cisco RV180 routher which is set to have LAN address (company network), and WAN is set as (subnet, gateway, dns When I conect directly 1756 ENBT/A card to my laptop (laptop is set to same range of IP addresses) I can see PLC and everything is working but this way is not practical for me. Is there any way to conect my office PC to PLC, some settings in RSLinx Clasic? Any idea would be helpful. I attached simplified network drawing for easyer understanding. network.pdf Thank you for your time and help, best regards, baric1007
  19. SIMATIC S7-1200 + HMI +network

    I have a Simatic S7-1200 and i have a couple of questions :) I have three analog sensor giving information to the plc. software = Simatic step 7 basic V11 my questions: - can i connect the plc via a cable to a rooter to access the network to use a printer ? -can i connect a SIMATIC HMI KTP400 BASIC COLOR PN via a cable to a rooter to use with the plc via the network? - can i generate a document in the software , add my sensor data and print the document using all of the above ? thanks for all the help :)
  20. Is possible to comunicate an Eaton/Cutler Hammer INCOM/IMPACC network with a Modbus network ? Any experience ? Many thanks in advance.
  21. cx simulator

    hello navigators anyone has ever tried with cx simulator to simulate the network with eternet query from another external PC turns to where cx simulator?