# Connecting to integrated S7 1500 OPC server

**URL:** <https://forum.inductiveautomation.com/t/connecting-to-integrated-s7-1500-opc-server/27799>\
**Category:** Ignition\
**Created:** [August 27, 2019, 2:10pm UTC](https://forum.inductiveautomation.com/t/connecting-to-integrated-s7-1500-opc-server/27799 "2019-08-27T14:10:57Z")\
**Posts on this page:** 1\
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**Author:** ![deon.korb](https://avatars.discourse-cdn.com/v4/letter/d/8c91f0/32.png) [@deon.korb](https://forum.inductiveautomation.com/u/deon.korb)\
**Post date:** [August 28, 2019, 6:42am UTC](https://forum.inductiveautomation.com/t/connecting-to-integrated-s7-1500-opc-server/27799/5 "2019-08-28T06:42:11Z")

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Hi,

We use the S7-1500 OPC UA Server extensively and are still in communication with Siemens to sort some issues out.

The server reboots on ANY download to the PLC, even changing a rung of code will make the server reboot. Upon first load, the server is overwhelmed by the number of initial reads. You can overcome this by setting the Max per Operation property in Advanced to 64 (you can experiment with slightly higher). This way the server can at least reestablish the connection.

Siemens has promised me that it will be fixed properly in TIA v16, releasing in November. We’ll see.

Once the server is connected and recovered after a download, it works beautifully. Just beware the restart issue.

Regards,  
Deon

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