# Opc keeps writing nulls as 0

**URL:** <https://forum.inductiveautomation.com/t/opc-keeps-writing-nulls-as-0/25090>\
**Category:** Ignition\
**Created:** [May 17, 2019, 12:47am UTC](https://forum.inductiveautomation.com/t/opc-keeps-writing-nulls-as-0/25090 "2019-05-17T00:47:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![khashey.ahmed](https://avatars.discourse-cdn.com/v4/letter/k/c5a1d2/32.png) [@khashey.ahmed](https://forum.inductiveautomation.com/u/khashey.ahmed)\
**Post date:** [May 17, 2019, 12:47am UTC](https://forum.inductiveautomation.com/t/opc-keeps-writing-nulls-as-0/25090/1 "2019-05-17T00:47:30Z")

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Hi ,

I am facing a issue all of a sudden these days sometimes opc server writes 0 in plc tag.I am using standard write value back to opc.The problem is once it writes 0 it doesn’t write back original value when connections recovers.I have to change the data type to trigger input to plc again.Any ideas ?