NOP equivalent in Logix 500 (Micrologix 1100)

[radfahrer]

Anyone know if there is an equivalent to the NOP instruction in Logix 500? I like to use them in my Logix 5000 for program organization and reserving the first line of the routine for commenting.

If there is not an equivalent, I was curious if others have some type of blank operation equivalent they use, ie maybe a dummy bit with an OTL so as not to get duplicate output errors in verify.

Any tips appreciated...

 

[Doug-P]

I've seen XIC and XIO in series referencing the same bit. More of an AFI functionally.

 

[dploof23]

You could turn a bit on unconditionally at the beginning of your program and use that bit with an examine if off where you wanted the nop to be.

Dave

 

[Lancie1]

Yes, any old unused B3 bit can be used to set up a program index or other information on the first rung. Any of the S:4 bits from S:4/4 up to about S:4/12 could be used (which will blink on and off to attract attention).