Inserting JMP instruction On-line??

RPax · Jul 10, 2008

Hi, quick one, was just wondering is it possible to put a JMP and Label instruction in On-Line on the ControlLogix. If I put the JMP intruction in, then the PLC will not recognise the label to jump to until I insert this. This I take it will shutdown the PLC. Is there any way around this??. Thanks - Rpax

kdcui · Jul 10, 2008

I believe a Major Fault will occur if there is no associate label to jump to.

However, if you insert the JMP instruction, simply stay in edit mode until you add the label. Changes will not take effect until you assemble the rungs.

daba · Jul 10, 2008

Put the LBL rung in first, then assemble your edits. The CLX will run happily with a LBL and no JMP.

Then put the JMP instruction in.

Take care with your LBL rung placement. If you need to move it using online edits I believe the controller faults (Duplicate LBLs).

tacm · Jul 10, 2008

Or Just put in a dummy bit in front of the instruction

RPax · Jul 11, 2008

Thanks for the help on this.

Inserting JMP instruction On-line??

RPax

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tacm

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