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Hi I have Unitronics Jazz PLC Jz20-J-T40 PLC. When I connect to my PLC and make online changes, like forcing bit that changes my output, PLC shuts down. This bit that I force, turns ON pump on Output, and then I should get confirmation work signal on Input, but instead, it shuts down. When I'm not connected to PLC, and this same situation happens, it works normally, i can also see confirmation work on my PLC screen. But when I'm connected it shuts down on same place. I have 8 pumps that works this way, and same thing happens on all of them. Does my model of Jazz PLC can work in mode that I'm trying to work in (online debugging with I/O changing) or not? Please help. Thankful in advance, Nikola Ljubinkovic