Modbus profile problem

[permar]

Hello!

I have created a modbus profile for my slave and it works great to reed the registers, however the slave only supports the function code "writemultipleregisters". I have added the "writatble": true in the profile but I get Illegal function in the log. It works fine if I do it in a script with mb:writemultipleregisters(47041, 2). Are there any way to get the modbusprofile to use the function writemultipleregisters??

Best Regards!

P

[Erwin van der Zwart]

Hi,

Have you try adding this field in the profile?

Code:

"write_multiple": true,

BR,

Erwin

[permar]

Works great, thanks!

Best Regards!

P

[permar]

Now I have a new problem. I have the following in my profile:

{
"name": "Förskjutning värmekurva",
"bus_datatype": "int8",
"type": "register",
"address": 47011 ,
"datatype": "int16",
"value_multiplier": 1,
"writable": true,
"write_multiple": true,
"units": " K"
},

This works great as long as the value are positive, when the value is negative I allways get the value 127 on KNX side. Have tryed the word_swap funktion with all the alternatives without success. I think maby the wordswap is done after the conversion frpm int16 to int8 and therefore has no effect in this case...? I need to have a int8 on the KNX side beacause of the comunications object on the other KNX devices.

Any suggestions?

Best Regards!

P

[admin]

Only byte swap can affect single register value, word swap won't change anything. Can you try setting bus_datatype to int16 and assign a temporary object to see if negative values work correctly?