I have a SLC 5/04 PLC and CP3 cable and DF1 selected in RSlinx, when I do auto-configure it says failed to find baud and parity! check all cables and switch settings!
With some types of USB to serial converters, autoconfigure may not work consistently. Are you using a real serial port or a converter?
beardog said:
I have baud set to 19200, parity none, stop bits 1, station number 00, error checking crc, protocol full duplex,
That all looks fine for a typical DF1 connection.
beardog said:
also the battery light is on and DH+. I want to download the program before I change the battery but I cannot see the processor.
I would think that you would want to
Upload (to your PC) the program before changing the battery, just as insurance...even with no battery the SLC can hold its program in memory for at least 30 minutes...I have seen the onboard cap in a new processor hold the program over night with no battery installed. There are other things that could go wrong and wipe out the program, so I think getting a fresh copy up front is still a wise move.
With a/b stuff, download, means send a program to the processor and overwrite whatever it contains. Be careful with these terms.
beardog said:
I have two cp3 cables so I am sure they are not both bad. I also have 1747-UIC cable for USB and still can't see processor.
The 1747-UIC is used for DH485 connections, not DF1.
The SLC serial port can be set up several different ways. it might be set for DF1, DH485, or User (ASCII) mode.
I would suggest (if using a USB to RS232 converter) that you try manually changing the baud rate and hitting OK, then open a RSWho window after each adjustment and look for it to appear under your DF1 driver. Give it a few seconds to appear. Also, turning off autobrowse and using the Refresh button to manually force the driver to browse is sometimes helpful.