NewbieToPlcs Member N Join Date Jan 2020 Location Uk Posts 10 Jan 13, 2020 #1 Anyone know what the Com+ 0 and Com- 0 are on the qbb at the bottom? Thanks
parky Member P Join Date Oct 2004 Location Midlands Posts 5,730 Jan 14, 2020 #2 your images did not come through,
danw Lifetime Supporting Member Join Date Oct 2004 Location midwest, USA Posts 3,427 Jan 14, 2020 #3 A screenshot image needs context. What brand and model device are talking about and why are you asking?
A screenshot image needs context. What brand and model device are talking about and why are you asking?
harryting Lifetime Supporting Member H Join Date May 2002 Location Puget Sound Posts 2,595 Jan 14, 2020 #4 Ken gave really detailed answer here already: http://www.plctalk.net/qanda/showthread.php?t=123272