sthompson

It depends how much control and access you have to the Network at your target location. You could set up a VPN to your target PC or even to a PLC. One option is to use something like logmein to remote into your PC. www.logmein.com Stu....

Welcome the the Forum Brad! In cases like this, I look for a Memory Card installed that could be overwriting Program changes. Is it possible there is a Memory Module installed? Stu....

That was what I figured, but I had to be sure. You will need RSNetworx for DeviceNet. Open the Scanner in RSNetworx, and find the I/O Mapping for the VFD you replaced. Write it down, and then remove the VFD from the Scan List. Apply the change, then reinsert the VFD into the Scan List, and put the I/O Mapping back in. If your RSNetworx doesn't have an EDS for the New VFD, you will have to get it from AB/RA and add it to RSNetworx. http://www.rockwella...tworks/eds.page? Stu....

Welcome to the Forum! If you need a Contact Closure, I would recommend the 1746-OX8, which has 8 Isolated Contacts. Stu....

Welcome to the Forum! How are you Communicating with the PF70 from the ControlLogix? Is it DeviceNet, Ethernet, or some other method? Stu....

Welcome to the Forum! As a general rule, yes. Refer to the Instruction Reference Manual for the individual Instruction, and how they are Scanned and Solved. http://literature.ro...rm003_-en-p.pdf Stu....

Welcome to the Forum! SLC Data Tables are limited to 255 Elements, so you are going to have to break it up if you want to save that many Data Points. You can allow the PLC to Index across Data Files, but this has its down sides as well. Look at an Instructions called FFL and LFL, you can also use Indexed Addresses or Indirect Addresses. SLC Instruction Reference: http://literature.ro...rm001_-en-p.pdf Stu....

With the information you have provided, there is no way for us to tell. One thing to be aware of, is Omron CXProgrammer doesn't save the Data Tables (i.e. DM) when you save the PLC Program. So, if there was Data required for Instructions to service the Monitor Software Communications Requests (i.e. PCMR), that Data will have to be reentered into the appropriate locations. Stu.....

Check the DIP Switch Settings on your old PLC CPU and the new one. I couldn't find a CPU21 for the C200H, did you quote the full CPU Part Number? Stu.....

Welcome to the Forum! What Software are you running to Communicate with the PLC? When you say you replaced the CPU, are you talking about the PLC or the PC? Stu....

Red Dog: Your Reply Post contained no information! Stu....

Welcome to the Forum! What Version of RSLInx are you using? What Version fo RSLogix5000? What Operating System and Service Pack? Stu....

Well, I haven't done anything with a CJ2M, but the first thing that comes to mind is a For/Next Loop if the CPU33 supports it. Stu.....

Hi Bob: From the Addresses and Instruction you mentioned, this is obviously an Omron PLC. Which Omron PLC Model is it though? Stu....

Have a look here. http://support.rockwellautomation.com/ControlFlash/ Stu....