Hello,

how to write/make (in LAD) a condition so that a mathematical operation is performed conditionally ?

Maybe via jump. conditional jump to the arithmetic operation or unconditional jump over the operation.

S5-90U/S5-95U Programmable Controller System Manual

regards

sancruz

Hello,

of course you can use the function Jump in ladder.

It looks like this

 F 3.0      M001
--||-------(JN)

 This means if the flag M3.0 = TRUE then Jump to mark M001.

Please look at chapter 8 of the manual which sancruz suggested.

Hope this is helpful.

regards
CaOd

I see chapter 8.2.10 Jump Operations in section 8.2 Supplementary Operations

Supplementary Operations is only for function FB. I need use FB. Is is right ?

I have checked manual and STEP5 software

I don't see option in STEP5 how insert instruction JUMP to label in LAD (for PB and FB)

How do this?

Hello,

yes, you need a FB to use the function JMP..

Maybe is this manual helpful for you (chapter 7)

Manual Step5

or this training manual

Training manual

regards
CaOd

Hello,

I have checked manual and I see 7.4 Complex Functions

There are only jump to block (menu BLOCKS):

Blocks
JU FB, JC FB
DO FX, DOC FX
JU..., JC...
C DB, CX DX

I don't see option in STEP5 how insert instruction JUMP to label in LAD (for FB)

Could you tell me where is it?

CaOd

Hello plcspace,

I have actually no access to a original Step5-software from Siemens.

One of the reasons is that you can't use Win10, and I have no more a PC with an older system like XP.

Another possibility is that you use the STL-language. There it's easier to write some lines with a JUMP to a label.

Maybe you can find some more information at the follow link

Step5 manual

regards
CaOd

Hello CaOd,

I add FB function in LAD

In attachement are printsreen with group instruction

Where are instruction for jump to label ?