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  1. Is it possible to add another AB Rockwell PLC to the network tree as a Generic Ethernet Module and use it as IO? Any idea where I would find information regarding assembly instance and size of I/O/C for AB Rockwell products? If possible, what are the pros and cons when compared to produce/consume and MSG instructions? Don't need to use it real world, just curious. Many thanks in advance.
  2. 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 192.17.150.208? Tell 192.17.150.30 Next and subsequent ARPs after the first one: 475.423471     Rockwell_cf:a7:6c     Broadcast             ARP      60     Who has 192.17.150.208? Tell 192.17.150.30 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!  
  3. CP1E RS232 Setup

    Hi everyone, I am fairly new here, I have a CP1E-N40DR-A And i need to send a string of data to a printer over rs232 from the built in port on the PLC, I have had a look online and canot find any information on what I need to do. all the tutorials are for CJ2 cpus ect and the instructions that I would normally use on a CJ2 dont work on CP1E PLC's. Any help or light shed would be great,  Thanks in advance
  4. Citect: Displaying IO device comm. Error

    Hi guys, In my current project, I have a number of energy meters (128) communicating on Modnet (TCPIP) with Citect as different IO devices. I have a screen, where I wish to display the communication status of each IO device. If there is an error communicating with a particular I need to associate a tag for displaying the same. Can someone guide me how to accomplish this.   Thanks for looking in.
  5. B&R PS465

    I have a big problem to solve here We have an old PS 465 with four masters The PLC is driven by a linux operating system with a KDE graphical interface This machine was commisioned by an italian company about 15 years ago and recently it suffered a power outage Now its my job to reinstate this beautiful machine with no back up files from the linux program Now i am told i can get the back up files for the B&R PLC so my question is the following if I get the B&R PLC files does anyone have an idea how long it would take to produce a HMI from Automation studio How advanced is Automation Studio Can I generate an instant HMI from the ladder code Whats the best way to test Comms port Any help would be great
  6. Hi ALL, Can Schneider Electric CitecSCADA 6.10 talk to AB Micrologix 1100 via a Ethernet Interface Communication Module [1761-NET-ENI ]? And what Citec Driver can I use to set this up? Thanks Chris
  7. Motoman Support

    I have a project that currently has a PC using C++ to send commands over to a Motoman Robot for palletizing. My customer wants to get rid of the PC since no one on the plant floor can troubleshoot if the PC goes down. They're asking that I put a PLC in in lieu of the PC, and control from there. The PLC and respective code is no problem, where I'm stuck is gathering info on what protocol I can use on the Motoman. My goal is to make the Motoman as "dumb" as possible and control everything from the PLC. Can anyone tell me what protocol I can use with the Motoman, details below: Robot Type: EPL80Controller Type: NX100Software Version: NS4.02 A(JP/US)-00
  8. I am trying to setup communication between an EIP21 and a AB Compactlogix processor. Setup both units with Network configurator and Logix5000. In Logix5000 I used the Generic Ethernet Module with the correct consumer and producer tags and instances. When I go online Logix can see the EIP and bring up the module information but the connection itself is in Error 16#0114 Electronic keying Error. Unfortunately cannot find a way to disable keying like possible on the Controllogix Ethernet module. Can Anyone help. An application example or some tips how to resolve it would be great. Kind Regards Rolf