frame repetition

terefere

VTFT have option who turn on frame repetition?. I search it but not find.
I have some slave who goes to sleep when only detect that I talk with other device. Now I need to resend frame several time for wake up.

If后要接end

There is no property setting for frame repetition, and frame repetition will only be resent after the timeout time is exceeded after the command is sent from the screen.

If后要接end

Maybe you can describe what kind of functionality you want to achieve

terefere

After timeout display will back to send all data who I have on actual screen.  If in slave some modbus register not respond, then display leave it and ask next register who is in queue. I want to made it that if some register not respond, then display try to ask it again (for example 3 times), and after this go to next register.
In lua it's not big problem to write it, but some data transmision is set from VTFT tool.

If后要接end

terefere 发表于 2022-9-23 15:51
After timeout display will back to send all data who I have on actual screen.  If in slave some modb ...

If so, I suggest you use lua script to send modbus commands instead of VTFT tool

If后要接end

terefere 发表于 2022-9-23 15:51
After timeout display will back to send all data who I have on actual screen.  If in slave some modb ...

Delete all the modbus variables bound in the control, and access these registers through the modbus api in the lua script. The read data can be set to the text control using set_value/set_text. At the same time, the script also supports modifying the slave ID.

terefere

Is more to job, but It seem's that I have no other way.. Or I need to made some simple device who will block frame with other address.

Ok, thanks for response.

terefere

Next problem, my slave have 25ms delay in response. I see that this response is overwriten by next mb_read function (at one screen I need to show several register). Change timing in protocol settings in VTFT not fix it

1. --**********************************************************************************************
   
2. function screen_manin_hp_config(ScreenActual, value)
   
3. 
   
4. local MD_BUF= {2,2}
   
5.         -- dummy read for wake up slave
   
6.         --MD_BUF = mb_read_reg_03(HP_SLAVE_ADR,HP_DUMMY_ADR,1)
   
7.         --mb_write_reg_06 (0,0,2222)
   
8. 
   
9.         MD_BUF = mb_read_reg_03(HP_SLAVE_ADR,HP_HEATPUMP_MODE_ADR,1)
   
10.         if (MD_BUF ~=nil) then
    
11.                 HPHeatPumpMode = MD_BUF[1]
    
12. 
    
13.                 if (HPHeatPumpMode == 0) then set_text(ScreenActual,3,"CWU") end
    
14.                 if (HPHeatPumpMode == 1) then set_text(ScreenActual,3,"BUFOR") end
    
15.                 if (HPHeatPumpMode == 3) then set_text(ScreenActual,3,"CWU+BUFOR") end
    
16.                 if (HPHeatPumpMode == 2 or HPHeatPumpMode == 4) then set_text(ScreenActual,3,"???") end
    
17.         end
    
18. 
    
19.         MD_BUF = mb_read_reg_03(HP_SLAVE_ADR,HP_PUMP_MODE_ADR,1)       
    
20.         if (MD_BUF ~=nil) then
    
21.                 HPPumpMode = MD_BUF[1]
    
22. 
    
23.                 if (HPPumpMode == 0) then set_text(ScreenActual,3,"CWU") end
    
24.                 if (HPPumpMode == 1) then set_text(ScreenActual,3,"BUFOR") end
    
25.                 if (HPPumpMode == 3) then set_text(ScreenActual,3,"CWU+BUFOR") end
    
26.                 if (HPPumpMode == 2 or HPPumpMode == 4) then set_text(ScreenActual,3,"???") end
    
27.         end
    
28. end
    
29. --**********************************************************************************************

复制代码

terefere

Ok, I check many way. It look's like u have some bug in LUA api level. At finish I made this screen and modbus comunication from VTFT tool. Here timming is the same who I set in protocol settings, and I not see any frame overwrite. Everything is fine and clear.

Pls prepare and connect some slave who response with 25ms delay, next, in LUA try to read some register two time's (one after one). First slave answer will be overwriten by second mb_read and both mb_read function will return nil. Some timeout work's wrong from your LUA api.
Many device have longer delay in response so this will touch not only me. Pls check it, I made first order for 100pcs and your display wait here- two meters from me.

If后要接end

You can test with this routine with modbus slave