plc 5/20 online editing?

wilsonzhu

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Join Date
Jan 2008
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vancouver
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I am not sure if PLC5/20 program can be edited online with some i/o points be configured to the logic( I/O card already be configured in the program). Thanks,
 
Yes, the PLC5/20 can be edited online.

Unlike the SLC500, the IO card is not configured as a part of the PLC program in a PLC/5. You configure the chassis (note that I wrote chassis, not rack) for half slot, full slot, or two slot addressing. Groups and Racks are logical elements that will be determined by the addressing mode selected for the chassis. The PLC/5 by default contains both an input and output word for each group.

These threads cover PLC/5 addressing in detail.

http://www.plctalk.net/qanda/showthread.php?t=18203
http://www.plctalk.net/qanda/showthread.php?t=21174

http://www.plctalk.net/qanda/showthread.php?t=18203
 
There is no word limit here, try adding a few to your unintelligible question.

If you are asking whether or not you can add input and output cards under power, the answer is no.

If you simply want to add logic with addresses that refer to an existing card, the answer is yes.

The PLC5 does not even care if the card is installed, the input and output image are always accessible.

Paul
 

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