[New to PLCs and need guidance]

V1040-T20B and I'm trying to connect via USB, Have checked the driver and is working good. Have selected the correct COM port. Still no luck

[New to PLCs and need guidance]

Hi all,

I'm also brand new to PLCs and am trying to connect to the PLC. I have followed the videos and help page but I have no luck on connecting it. The PLC I'm trying to connect has a programme in it already but I'm getting this following error. Any ideas?

[RS232 data read]

Thanks for that Joe,

The code you sent me works. I'm seeing the individual number now. Now I'm trying to gather 4 numbers together in an array, is there a function to do this? Or do I need to re-think my approach? 

Appreciate the support

[RS232 data read]

Thanks for the reply Joe,

Can I do that within the scan block or is there another function to manipulate the incoming data. At the moment I have it printing P1, R1...etc on the screen.

 

Serial Example.vlp

[RS232 data read]

Carrying on from this,

I want to group 4 numbers and compare it to a set value.

Eg. set password 1111 and compare it to the input.

Any tips on doing this for me guys?

Thanks in advance

[RS232 data read]

Hi Joe,

This was what my problem was all along 😐.

Thank you so much for that.

Thanks Simon and Aus for the tips.

[RS232 data read]

Thanks for the suggestions Simon,

Unfortunately, my session complete won't trigger. 

On the HEX mode the messages have spaces in between them, do I need to do something do the spaces?

[RS232 data read]

Thanks for the reply Aus,

I'm still stuck on the Scan protocol. MB2 does not increment so I think I'm not setting something right. Any tips on how to set up my scan protocol to read this message? My MI2 reads a -1 - I read on this thread that that happens when data is coming in but doesn't match the scan protocol?

Thanks in advance.

Gate Control 0.1.vlp

[RS232 data read]

Many thanks for you reply Joe,

Correct -the end game is to enter numbers on the external key pad (So when I enter a user code eg 1111 I want a gate/door to open).

I discovered the message "P1" is displayed when the button is pressed and "R1" when you take your finger off the button. I have attached screenshots of the code and the info mode in ASCII and HEX.

Thanks in advance

[RS232 data read]

Hi Joe,

I am a newbie to unitronics and PLCs and I'm playing around with a unitronics V570, I have connected a number pad which communicates via RS232 to COM2 in my PLC. I have downloaded your sample code and changed the COM init to COM2. On the PLC info mode I can see the PLC is receiving the messages when I press the buttons (it's a 3x4 numbered key pad and I can see R1 on the RX pane on port 2 in the info mode when I press key 1, R2 when I press R2 and so on). 

I want to display 1 when I press 1 and so on the text box.

Any guidance is greatly appreciated.