Bit errors

So this may be a simple question, im trying to activate an alarm when I0.0, I0.1 and I0.3 is activated sofar i have created a varible in INT on the plc ``IW0´´ to activate the alarm but the alarms only activate when the bits I1.0,I1.1 and I1.2 are activated.

My question is how do i activate I0.0, I0.1 and I0.2?

Hello Jackcaress,

Have in mind that the bytes are swapped.

@edit,

Perhaps this link might help:

How do you have bit alarms generated automatically in WinCC (TIA Portal) Basic/Comfort/Advanced?

And another link:

Configuration of Messages and Alarms in WinCC (TIA Portal)

Best regards,

Wizard

Wizard

Hello Jackcaress,

Have in mind that the bytes are swapped.

@edit,

Perhaps this link might help:

How do you have bit alarms generated automatically in WinCC (TIA Portal) Basic/Comfort/Advanced?

And another link:

Configuration of Messages and Alarms in WinCC (TIA Portal)

Best regards,

Wizard

 Thank you Wizard for your help, i tried all the bits and found that I0.0 starts from bit 8 of the word.

Knowing this i can progress 

Last question lol,

I now have it working perfectly, everything apart from the warnings i have in NC.

I have to make warnings for two levels in a water tank, one is NC (Minimum_Level) and one is NO (Maximum_Level)

Minimum_Level shoud activate from 0 to 1

Maximum_Level should activate from 1 to 0

How can i do this?

Hello Jackcaress,

I would use a MW or DW instead of IW.

When you use a MW, you can use a Falling edge to 'set' flag bit.

Best regards,

Wizard

Wizard

Hello Jackcaress,

I would use a MW or DW instead of IW.

When you use a MW, you can use a Falling edge to 'set' flag bit.

Best regards,

Wizard

 It dosent let me use a DW and when i change it to MW it stops working 

Hello,

Which CPU are you using?

Best regards,

Wizard

Hello,

You can use Slicing, see the following link:

How in STEP 7 (TIA Portal) do you access the unstructured data types bit-by-bit, byte-by-byte or word-by-word and symbolically?

If it does not work, please explain what you are doing.

Best regards,

Wizard

This is what i have...

A varible in the plc  IW0

A varible in the HMI that is linked to the varible in the plc

Warning messages that are activated by the digital inputs ej I0.0 activates IW0.9 that activates the warning.