George Z Posted March 14, 2012 Report Share Posted March 14, 2012 Got a black screen this morning on my 570 PLC - listed COM1 and COM2 and their configuration along with a third line saying "Expansion Pack Error". Restarted the unit but I don't seen to have any inputs. Is there anything further I can do to debug this or do I just have to replace the I/O module? Thanks, George Quote Link to comment Share on other sites More sharing options...
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