# OPC client Delay?

**URL:** <https://community.factoryio.com/t/opc-client-delay/1411>\
**Category:** Uncategorized\
**Created:** [April 2, 2022, 8:09am UTC](https://community.factoryio.com/t/opc-client-delay/1411 "2022-04-02T08:09:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jorcoval](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@jorcoval](https://community.factoryio.com/u/jorcoval)\
**Post date:** [April 2, 2022, 8:09am UTC](https://community.factoryio.com/t/opc-client-delay/1411/1 "2022-04-02T08:09:10Z")

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I’m working with a s7-1200 Siemens PLC, FactoryIO 2.5.1 licensed and MatrikonOPC.

I have a project with 200 IO tags aprox, most of them are boolean.

If i work directly with s7comm driver, Factory IO works. If I work with OPC driver, i have 1 second delays (or more) at Factory-PLC comms.  
If i try opc with a few tags, everything works great.

Is factoryIO able to work with 200 tags with OPC? (I know the limit is 256)  
Maybe the problem is the PLC? (S7-1200 series dont have a great CPU).

Somebody has tried this with a s7-1500 or more than one PLC?

Thanks