# Siemens S7-1500 & Ignition Communication Slow **URL:** \ **Category:** Ignition\ **Tags:** ignition79\ **Created:** [June 19, 2020, 7:53am UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819 "2020-06-19T07:53:37Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![ashok.naphde](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ashok.naphde/32/16865_2.png) [@ashok.naphde](https://forum.inductiveautomation.com/u/ashok.naphde)\ **Post date:** [June 19, 2020, 7:53am UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819/1 "2020-06-19T07:53:37Z")
Hello Experts, 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. Thanks… ---
**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\ **Post date:** [June 19, 2020, 1:00pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819/2 "2020-06-19T13:00:41Z")
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? ---
**Author:** ![ashok.naphde](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ashok.naphde/32/16865_2.png) [@ashok.naphde](https://forum.inductiveautomation.com/u/ashok.naphde)\ **Post date:** [July 22, 2020, 3:45pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819/3 "2020-07-22T15:45:14Z")
Hi Chi, 1. PLC side : I am using PLC embedded OPC-UA server. 2. Ignition Side: I am using driver Siemens S7-1500(Connect to Siemens S7-1500 PLCs over Ethernet) under devices. 3. All 2500 tags are from different data blocks & Inputs area. 4. I am using default scan group of ignition. Thanks ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [July 22, 2020, 3:47pm UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819/4 "2020-07-22T15:47:34Z")
> [@ashok.naphde](#): > > - PLC side : I am using PLC embedded OPC-UA server. > - Ignition Side: I am using driver Siemens S7-1500(Connect to Siemens S7-1500 PLCs over Ethernet) under devices. These statements are contradictory... ---
**Author:** ![Ashwini\_Damle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ashwini_damle/32/39410_2.png) [@Ashwini\_Damle](https://forum.inductiveautomation.com/u/Ashwini_Damle)\ **Post date:** [January 25, 2023, 1:04am UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819/5 "2023-01-25T01:04:07Z")
Hey Kevin, could you please elaborate, cheers ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [January 25, 2023, 1:06am UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819/6 "2023-01-25T01:06:43Z")
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. ---
**Author:** ![Ashwini\_Damle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ashwini_damle/32/39410_2.png) [@Ashwini\_Damle](https://forum.inductiveautomation.com/u/Ashwini_Damle)\ **Post date:** [January 25, 2023, 1:10am UTC](https://forum.inductiveautomation.com/t/siemens-s7-1500-ignition-communication-slow/35819/7 "2023-01-25T01:10:29Z")
Ah right, thanks