Shift rigth

[Mac9010]

Hi everyone

I am looking for some information about "shift rigth" in the unilogic software, but I couldn't found anything.

I am trying to do a program with the function "shift right "  I made it in a PLC JAZZ but now we need to use a PLC unilogic USP- B10

 

The aplication is the next 

I have a machine that has a camera, and it takes a photo about a "code" if the code is correct the camera send a signal "ok" or 1. to my PLC.

and now when the camera send a signal bad or "0" , and now i would like to make the next. 

 

                                                                              final discard 

camera  bit  1    1    1    1   1    1    1      0     1

camera bit  1     1     1   1    1   1   1      1      0    

when the signal goes to cero in a specific point of the machine  , i want to activate a signal to discard the product that didn't have the correct code. 

 

Someone could help me with this?? 

or could explain to me,  how to can I use the shift rigth, or helpme with some information.

 

Thanks in advance.

[Joe Tauser]

Unfortunately, even after all the years UniLogic has been around some of the function blocks haven't made it into the Help.

However, if you hover over the letter of any block a tip will appear:

You can't see it, but my mouse pointer is over "A" - the source tag or array.

"B" is the number of bits in the tag or array to shift.

"C" is the value of the bit shifted out.

@Cara Bereck Levy - could we get the Shift Rotate functions added to the Help?

 

Joe T.

[Mac9010]

HI Joe. 

Thanks for your help! 

I have a question, What is the largest number that can be used in the letter "B"? 

And I understand that the shift source could be a Input of the PLC, but the shift out bit, what kind of value could be ? 

Thanks in advance 

 

[Joe Tauser]

The shift source needs to be numerical tag with more than one bit, like a UINT16.   It could be an array of UINTs. 

When you speak of an Input, do you mean a discrete input?  If so, then that won't work.  You'll need to write some code to set a bit in the source tag with the Set Bit function under the Logic menu.  If you're shifting right, I'd recommend setting bit 15.

I don't know what the largest "B" value is.  I tested it by making an array of 50 INT16s and entered 512 and it took it.

The shift out is a bit.  0 or 1.

At this point I'd recommend writing some test code and playing with it online so you can see it work.  You're not going to break the PLC.

Joe T.