Block "modbus set slave ID"

[Zinenko Alex]

Hello, I was interested in the "modbus set slave ID" block with its name, but I do not know how to work with it and what it does, I also wanted to understand - is it possible to change the slave ID in Unilogic?

[NoamM]

Dear Zinenko Alex ,
On UniLogic you set the Slave ID in the next view:

 

The "Set Slave ID" bloack allow you to change the value on run time. For example if I set in UniLogic slave ID 2 and I want to change it to some other value on the PLC I will use "Set Slave ID".

[micapp]

Can you please make a user guide for this block?

[curtharrington1]

try this:

 

 

Slave1.SlaveID is unitronics' struct

newSlaveID is UINT8 and is the new ID you are requesting

 

 

[pascal]

Tried this on Panel Ethernet master Modbus, but here this is not working 😪.....

I have about 50 slave's I have to read....

So I tought, I only make 1 routine for all 50 slaves, just changing it's slave ID nr, but no...

any suggestions ?

[Joe Tauser]

Advanced Modbus will set you free.  It's more complicated but gives you the control of the Vision function blocks.  See this topic-

I set up all my slaves in this application in a couple of  data tables.  It worked quite well, as I wrote a State Machine that loops through the appropriate table until it finds a slave ID of 0.  I wrote four separate functions for read coils, write coils, read registers, and write registers to keep it "simple".  You can put your Slave ID, Start Address, Length, and a pointer to a an array element for a local tag in the table. 

Unfortunately, the application I wrote is for a customer and I can't post it but if you take a swing at it and PM me I can work with you.

Joe T.