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mlepine

SLC 5/03 online programming

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Hi everybody, I would like to know if is it possible to make online programming on an SLC 5/03. If it so how we do that Regards

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Yes it is possible to make online changes with a SLC 5/03. Once online, either double click the rung you want to modify or else right click on the rung you want to modify and select "modify rung." Then make changes Accept changes test changes assemble edits Forgot, make sure the key is in the remote position. Edited by Armadillo852

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Early OS versions of SLC5/03 did not support online editing, indirect addressing and floating point.

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RSLogix-500 Starter Version Will Not Do Online, Will Have To Upgrade To Next Level, Not Sure What Cost Will Be. I'am Using The Starter Version Myself

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One thing to add: while you do online edit, you cannot expands data aera, for example if the B3 file is from B3:0 to B3:10 you will not be able to use bit B3:11/0. You must expands adress aera by download only. Tip: when you do a program, use a bit like B3:100/0 and delete it. RS500 left available memory up to B3:100 you you'll be able tu use more bit in online edit. You can do same thing for N, F, timer, counter, ect...

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You can mark the file so it won't get shrunk too, but I often use the last bit in a binary file as a rung comment. I have been told, (but have no proof) that this is a waste of CPU time, increasing scan time, and this may be true especially in older slower systems, but it is fool proof. To mark off a block that you want to show as used, perhaps there is not any PLC logic using it directly, perhaps it comes from an hmi and is read using file indirect addressing. To force that area to show up as used in the data file, you can copy it to itself in a spare ladder file and you don't even have to call the file. Put a rung comment explaining why you are copy four files with 8 rungs with source as destination having the same addresses...no scan time hit, the PLC never jumps to this file, but RSLogix500 will respect it when you change processor types and it offers to delete your spares for you, or when it offers up the next available address when you enter code. Edited by OkiePC

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