Modbus master - connect failed

[cgn]

I've a W4k, which I want to use as modbus master and slave.  
With the IP .128 W4k is a modbus slave. The script for this workes fine.
With the IP .129 W4K should be a modbus master. I've created and imported a modbus profile. The objects of this profiles are mapped as well.
Any idea why the connect failes? 
   

[admin]

Looks like you are try to connect master to itself. Is the device you want to connect to Modbus TCP or RTU?