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Old February 9th, 2018, 05:21 PM   #5
GaryS
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Join Date: Aug 2003
Location: Lancaster Pa.
Posts: 632
That's a common problem on the SLC5/04 it looks like somebody changed the channel 0 port to something other then the default factory settings. When that happens the only way to connect it either through the Data Highway port if you have the hardware or to reset the processor back to the factory default but when you do that you also lose all programs and data in the processor. If you have a copy of the original program stored away someplace your are good if not you may not be able to get in.
Good Luck
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