OPC UA Client problems

[Zhongxian]

Thanks for your reply.    i want to  let plc as opc ua client to read datas from opc ua server (injection moulding machine from arburg), that is the background. 

i use beckhoff's  virtual opc ua device to read data from opc servers.  i can successfully read the datas when my own computer connect directly to the server and program runs in  computer as the picture show below ,the value of the variate f036 is 2.  the result is ok.

but when i my computer connets to plc, plc connect to the server, i download the program to the plc,   activate it.  the program successfuly runs, but the 

value read from the server is 0, the acutul value is 2.  all the other datas are the same results.

using sample client in plc side,i can successfully read the data. but the value of the data are empty  in plc program.my firewall is closed.

if there is other settings in plc, or in oes side.  need for your help, thanks .

the use of the virtual opc ua, i reference to the beckhoff  help system. i install  TF6100-OPC-UA-Client/TF6100-OPC-UA-Configurator/TF6100-OPC-UA-Gateway in both my computer and plc side  as it required. that is all . thank you.

[Zhongxian]

thanks for your reply, mate,  by the way,  what do you mean the certificate,   my develop computer haven't installed that.  we use none-none way to communicate with arburg.   the time between arburg and my plc differs , i have a try.