I am Using Siemens S7-1500 Series PLC & Ignition V7.9.
I done the configuration of driver & created tags Total around 2500 tags i am using in my project, communication is ok but it take around 5 sec time to update.
if any change in PLC (bits status or integer value etc) takes around 5 sec to update on ignition. how to resolved this problem.
Far too little information here to answer your question.
What driver are you using (Processors embedded OPC-UA or Ignitions lagacy driver)?
What is the connection between the gateway and the processor?
How are the tags organized? Polling a single data block with 2500 tags makes a huge diference to polling 2500 spreaded over different memory areas.
What is your scan group configuration?
If you use the embedded OPC UA server in either the S7-1200 or S7-1500 then you don't use Ignition's S7 driver; you just make a direct OPC UA connection to it. OPC UA connections are a first class thing in Ignition, separate from the Ignition OPC UA server and its drivers.