Double Word Type variable

[Andrei Blagaila 4]

I've been searching the manuals and either i search the wrong thing or i've been searching the wrong manuals. How to I name a double word Variable? (I need 32 Bits stored in the same variable)

[AlexMota 3]

 

  In ladder, generally we write a "D" before instructions with words, like this:

 

MOV K100 D0  // move value 100 to D0 (single word)

DMOV K100 D0  // move value 100 to D0 and D1 ( D0 is last significant)

When we use bits , we need write how many bits is necessary, like this:

MOV K1 K1M0  // move value 1 in M0,M1,M2 and M3 (M0 is last significant)

MOV K1 K2M0  // move value 1 in M0,M1,M2, M3,M4,M5,M6 and M7 (M0 is last significant)

and so on...

to 32 bits

MOV K1 K8M0 // move value 1 to M0 - M31

 

Best regards

 

[Andrei Blagaila 4]

So I need to store a RF-ID that i read. Now it's on 16bits. I want to pass it to 32. I want to store them in the same variable for example D1. It's not 100% clear form the examples. so not bit by bit but the whole thing. How do I do that keeping in mind the value I read needs to be a double word as well.

[Andrei Blagaila 4]

I just use DMOV instruction like DMOV D0 D2 to move the value D0 and D1 intro D2 and D3? (d0 and d1 being the value I read and D2 D3 being the double word I store them in)

 

[Crossbow 295]

That's all there is to it...

[Andrei Blagaila 4]

And if i want to use the bits in it i just call d0.1....d0.F ? 

 

[AlexMota 3]

 

Hi,

Which instruction do you want use "D0.1"?

I think is not possible use "D0.1" in MOV instruction, just the whole word(D0)..

Is possible use like a open contact or another type of contact instruction

[Andrei Blagaila 4]

To use it as a condition not with MOV but like D0.1 and D0.2 -> Y1

[AlexMota 3]

 

Yeah,

This is possible !

Edited 5 Oct 2016 by AlexMota

[Nightfly 12]

Quote

To use it as a condition not with MOV but like D0.1 and D0.2 -> Y1

 

Think this is dependent upon what PLC you are using - For example I’m pretty sure you can’t do this on Fx3G’s - but you can on Fx3U’s and Q’s etc

 

 

[Andrei Blagaila 4]

I'm running a Q50UDEH so I think there shouldn't be any problems.

[kaare_t 155]

Edit: Misread, yes you can use D0.0 or D0.F to access bit in words.

Edited 6 Oct 2016 by kaare_t