cszikszai

Thank you guys for the responses! You are correct. I called Omron support and they told me that the source code was not uploaded onto the PLC, which is why I couldn’t edit the code by taking it off the PLC. I didn’t realize that the PLC program and Source Code were two separate things… baby steps…

Hi All, I am a new user to this Forum and definitely a newbie PLC user, so I'm not sure if this is a simple mistake. I am currently trying to correct the logic (of a sensor) on a PLC program to get a manufacturing machine back up and running. This is an issue that I have fixed via PLC several times previously, but for some reason I am having issues fixing it this time. The issue that I am having is that when I try to dig into the Logic of the PLC program (Programming > POUs > Programs > Logic > ...), nothing shows up where there is typically a PLC command ladder. I get the error "No instruction in rung" next to all of the PLC program modules. I am connecting to a Omron NX1P2 CPU via laptop & Ethernet cord. To give you background on my troubleshooting process, I have verified that the I am connected to the PLC controller, by using the Windows Run program to ping the IP address of the controller. After verifying connection, I attempted to connect to the controller using SYSMAC studio. At this step, a troubleshooting window appeared with the issue "Minor fault" "Tag Data Link Connection Timeout". When I look at the Controller Status at the bottom right corner of SYSMAC, it says that I am online and connected to the correct IP address (green circle). Under that, ERR/ALM has a red circle next to RUN Mode. Ignoring the troubleshooting window, I can click Synchronization and "Transfer from Controller". A dialog box pops up and reads "...Controller does not have the POU program source...". Pressing yes to ignore this, the transfer completes. This is where I encounter the issue of having nothing show up within the path of Programming > POUs > Programs > Logic > ... . I have a feeling that this is a connectivity or settings issue, but I am not sure. I have checked my ethernet splitter (D-Link DES-105) and everything seems to be connected and working. If anyone has some insight into this issue I would greatly appreciate any help. Thank you in advance! Best cszikszai