How to disable OBs in Step7
- Thread starter Mihi88
- Start date
KalleOlsen
Member
The best way is probably to copy the code from the OB to an FC which you do not call.
Or put in BEU in top of the OB.
Or put in JU M001 // Jump to label M001
(code not to be executed)
M001: NOP 0
(mode code)
Kalle
Or put in BEU in top of the OB.
Or put in JU M001 // Jump to label M001
(code not to be executed)
M001: NOP 0
(mode code)
Kalle
KalleOlsen: yes, it's good option.
Better then enable bit on every Network.
Understand I that correctly the program will be even downloaded into PLC with this OB (that will do not anything)?
KalleOlsen
Member
Yes.
Which OB number is it?
Kalle
Which OB number is it?
Kalle
My question is general, but in this particular OB number is 126.
KalleOlsen
Member
Never heard about OB126, it is neither in my standard library nor in the help file. So now I got curious. What CPU type do you use and under what condition is OB126 supposed to execute?
Kalle
moggie
Lifetime Supporting Member
Is this for a S7 1200 PLC? With Step 7 TIA
For S7 TIA then "Organization blocks for cyclic program execution" ...... "You can use multiple OBs (OB numbers >= 123)"
manmeetvirdi
Member
Write "BE" as first line in every OB of yours.
Yes, it is for a Simatic S7-1200 PLC in TIA Portal V11
Number may be in the range 1, 123-32767.
moggie
Lifetime Supporting Member
If you really need to keep the OB then in the first network program a -(JMP) to a "LABEL" that is in the last network of the OB, then everything in the OB is "bypassed"
uptown47
Lifetime Supporting Member
I'll second the option of putting a BE at the start of your code. This means that if/when the block gets called it 'ends' straight away without executing the rest of the code. Also, by having the BE at the start, it is immediately clear to anyone looking at the code that the rest of the block isn't going to be executed.
;-)
;-)
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