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[JTMachineDesign]

New to Unitronics.    Now working for a company that has a couple of dozen machines run with Vision PLC/HMI units.

What do I need to do to get a Vision-based system to read and execute a subroutine when the machine sees a barcode?

Datamatrix barcode. - reader has not been selected yet.

[Ausman]

Hi,

1).  Vision reads bar.

2).  Vision executes bar entry routine.

3).  Vision proceeds to bar.

4).  Vision reads different codes.

5).  Vision interprets codes, runs decision-making subroutine.

6).  Vision waits for a while accepting results of decision-making sub.

7). Vision leaves bar sub.....somewhat unsteadily.

8). Vision attempts to run main program normally, but errors appear out of nowhere.

Sorry JT.  Couldn't help myself.  You'll get a serious answer soon from someone who really knows how.

cheers,

Aus

[Joe Tauser]

Aus, you are such a card.  

You need a barcode reader with an RS232 output.  Most barcode readers have an adapter cable if you look deep in the accessories.

Then you have to define what you want to do.  Sample barcode data?  Sample decision process?

Then read all the Help on the Protocol block, which is what you will use to read the barcode reader's output.

Then read the Help on the String function blocks, which is what you will use to make sense of the barcode reader's output.

That's about all I can tell you with the information given.

Joe T.

 

[rayair]

we need to install a barcode  reader Code 36 on vision 700, can anyone explained how to program using a trigger to start the reader?

appreciate a reply.

br

[Joe Tauser]

Is your reader the handheld type with its own trigger or is it a fixed unit with an external trigger input?

If it's handheld, then you pull the trigger and it will spit out a serial stream when it sees a valid code.

If it's mounted, there's usually a digital input on it to trigger it.

Either way, you'll need to catch the serial string with a Protocol Scan block and decide what to do with it from there.

Joe T.

 

[Flex727]

On 3/13/2018 at 5:12 AM, Ausman said:

Hi,

1).  Vision reads bar.

2).  Vision executes bar entry routine.

3).  Vision proceeds to bar.

4).  Vision reads different codes.

5).  Vision interprets codes, runs decision-making subroutine.

6).  Vision waits for a while accepting results of decision-making sub.

7). Vision leaves bar sub.....somewhat unsteadily.

8). Vision attempts to run main program normally, but errors appear out of nowhere.

Hmm, I read something recently that might apply. Oh, yes, here it is: