# Uncertain\_IntialValue

**URL:** <https://forum.inductiveautomation.com/t/uncertain-intialvalue/44803>\
**Category:** Ignition\
**Created:** [March 23, 2021, 5:04pm UTC](https://forum.inductiveautomation.com/t/uncertain-intialvalue/44803 "2021-03-23T17:04:05Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![npai](https://avatars.discourse-cdn.com/v4/letter/n/c6cbf5/32.png) [@npai](https://forum.inductiveautomation.com/u/npai)\
**Post date:** [March 23, 2021, 5:04pm UTC](https://forum.inductiveautomation.com/t/uncertain-intialvalue/44803/1 "2021-03-23T17:04:06Z")

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Hello all,  
I tried my hands on the software using a test bench and I’ve been enjoying it past 2 months now. I was testing software for upgradation of our screen at our plant but few days ago I encountered a problem that my Ignition Screen can write values but cannot read the values from the PLC. And it overlays an error of green color question mark on every display element. I went through various forums but no help can be found.

If anyone could help me with a solution it would be greatly appreciated.

PLC - MicroLogix1100, Ethernet IP protocol.

Troubleshooting- Checked the communication works well for writing but no read of the present. Deleted all tag database and imported again. But all in vain.