Mapped modbus objects value issue

[gdimaria]

I have noticed the following problem in more than one system:

for example, we have a modbus HVAC device with temperature registers mapped to physical knx addresses in LM. 

In the same system there is a KNX touch panel which should display the temperatures in real time. This doesn't happen. 

The temperatures reach the LM, but not the touch. 

To display them from the touch I had to create an event script that reads the value and writes it to the bus, then you can see the temperatures on the touch panel. 

Obviously it doesn't seem like the best solution to me, especially in the case of dozens and dozens of register values to be retransmitted.

   


I also tried checking the "write on bus" option, but nothing happens.

[Daniel]

This option has nothing to do with writing to bus of registers, this refers only to device status object.
Go to register mappings and check it there. Log the object to see if values do arrive.
Why your pooling interval is empty?

[afbezerra]

Hello,

I Have the same problem.

I have the modbus equipment well registered and without errors. The modbus variables are mapped and updated. In the object log, only few variables have decoded values! Why?

This are a big problem to my project, because can´t atualize the values in SCADA.

I appreciate all the help.

[admin]

Most of your object log entries are group reads which don't have a value.

In one of the screenshots a device is marked in red meaning that there's a communication issue. Check Error log in the Modbus tab for more details. Usually communication errors are fixed when GND is connected between LM and all other Modbus devices.