V700 TCP ip modus ladder . Trying to send Temp reading to Raspberry Pi4 and receive an answer of 1 or 0

[Timeout]

[kratmel]

You post some ladder code for V700.

But you must post in this topic information about both side of connection (V700 and Raspberry PI4) and for what purpose this connection needed.

 

[Flex727]

Also, I can't see all of it but your code for the Socket Connect appears to be poor form. Check the example projects to see the best methodology. Basically you want to set a bit to connect after the MODBUS configuration block and use a direct contact of that bit to activate the Connect block. At the end of the Connect block, the connect bit should be reset.

Your code will instantly try to re-connect upon closing the Socket.

[Joe Tauser]

It's also much more helpful if you attach your program to your post - see the "choose files..." at the bottom of the typing window.  A lot of times if I can open the program I can make some commented edits and re-post the program.

Joe T.

[Timeout]

Good  Morning,

Thanks for the replys....

I need  to send via TCP IP  a temperature reading 4 digits eg  (2545) Mi 50 and read back to Mi 571. 

This information needs to be send to and received returned back from a Raspberry Pi4.

I need to know the logic also in the Raspberry Pi.

Any help would be most appreciated.

I attached my program..

 

SNOWLEES main 18012022.vlp

[AlexUT]

Hi,

We are not experienced in Passperry Pi.

1. Do youuse any MODBUS Library at Raspberry Pi side?

1.1. How it is configured?

2. All sockets at V700 side are configured as SLAVE.

To use CONNECT, used socket should be configured as MASTER.

3. MB 901 has no coil. So when it is set?

4. You should not send CONNECT at each PLC Scan.

Do it with timer 1 sec.

5. Check in INFO mode MODBUS Socket status.

6. If socket status is CONNECTED - activate MONITOR->HEX for MODBUS socket and check send/receive content.

This will show you what PLC send to RPi and what PLC receive back.

 

[Timeout]

Hi Guys, I am still trying to get a connection between my V700 and a RaspberryPi4.

I believe that I have set up the Raspberry Pi as a Master.

I believe that I have set up the V700 as a slave.

I have included both..

I am trying to connect Master/Slave TCP IP Modbus 

I want to read Mi 50 , a temperature reading and get an answer to Mi570 

Any help will be much appreciated

SNOWLEES main 14022022.vlp Test 1.py

[Flex727]

It looks like you're using Socket 7 for your Raspberry Pi communications. I see the following problems:

1) You're trying to connect from the slave (the V700). The Master should do the connection. The Slave should only be passively scanning (after configuring for MODBUS).

2) You're trying to perform communication operations with Socket 7 before initializing it.

3) Your MODBUS configuration appears to be configuring socket 2 instead of socket 7.

[Timeout]

Could you please change the concerning issues in my program..

[Flex727]

I had a few minutes this morning so here you go.

SNOWLEESmain14022022-BL.vlp

[Timeout]

Thank you very much for your,,.. I will check this evening..

[Timeout]

Thanks for the Assistance. Much Appreciated.

I managed to connect, receive and  send data between the PLC and raspberry with the Raspberry Pi as the master.

Again, Thanks for you r help...