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Hey, this may be an obvious question, but here goes: I have a CompactLogix L36ERM running RL5000 controlling one of our lead die cast machines. When I make a change to the program offline and need to download I always go and shut the machine down for safety reasons before downloading. One of our techs stopped the machine but left the control power and hydraulic pump on while downloading (something we are not supposed to do) when he finished downloading he switched it back to run mode and the machine closed on it's own and started right back up. This is a safety concern to me. We have a "close enable" tag that is true when all necessary conditions are met, and gets latched on when the machine is running in full auto. Before he downloaded the machine was at idle, meaning that the only way to close the machine would be to press the two dead-man switches to start the process. But, when he downloaded it started up automatically. Now I know the reason why is when the program was last saved, the "close enable" tag had a value of 1, it was latched on, so it bypassed the dead-man switches. A quick fix would be to save the program with that tag un-latched so that it can't start up on it's own after downloading. But, in case somebody saves the program while the machine is running and with that tag latched on, I need a better solution. Is there any tag or bit that goes true when a program is downloaded or when the mode of the PLC is switched from run to download to run? I want to manipulate that tag so that when I download it un-latches the "close enable" tag. I'm sure there is a way to do it, I'm just not even really sure what to search for in the online help. Any help is greatly appreciated. Thanks Howard

Hi all, I have been trying to emulate an exisiting logix5000 project but am struggling somewhat. All the online help I have found so far is just showing me how to set up emulator with a new project. I.e. set up the controller from scratch. What I need to do, is take a project code from an exisiting process, make my changes and then test on the emulator. I did it once but as soon as I downloaded the project to the emulator controller I got near on 900 errors as the code couldn't resolve the I/O. If anyone knows of a technote that advises on existing code emulation that would be great. Just to be brave, I actually want to set up multiple emulators and have a couple of codes running at the same time so I can test SCADA I/O, is this possible? Cheers for now Alex

Hi, I have a challenge with GX developer version 8.63R (SW8D5C-GPPW-E). I'm trying to verify 2 projects (offline). Some programs I know there are changes but they are not shown in the verification. In 1 program I did see the last checked change was in step 1496 (next change I did see by manual check was step 1502. it seems like this type of verification is limited to 1500 steps to check. Is there any way I can make this offline verification work? the most progams that we have in our project are over 2000 steps. big thanks in foreward

I need a Sample Simple Project to download . with Unity Pro XL and M340. Water treatment plant with pumps and mixer. Please Helpppppppppppp. My Email is : Shararehmirbagheri@yahoo.com