Posted 20 Jan 2010 Hi all, I have to do eberle plc conversion to AB M-1400 plc. I've got ladder (print copy) with kind of statement list above contact. LB003 for start rung with adress b3, ANB100 for nc contact, OB004, for branch, ect... I've got a contact with ATB001, I think is not a timer because few instruction contain AT001, ONT003, ect so T means timer, B bit what TB means? I also got PB121 contact. What PB means? one shot? system bit? thanks for your help Share this post Link to post Share on other sites