---
title: When data is written using the αSTEP AZ Drivers with Ethernet/IP communication, my changes are not saved in the drive and reverted back to the previous settings after a power cycle. How do I fix this?
description: Data writing over Ethernet/IP
---

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# When data is written using the αSTEP AZ Drivers with Ethernet/IP communication, my changes are not saved in the drive and reverted back to the previous settings after a power cycle. How do I fix this?

## Data writing over Ethernet/IP

Data written via EtherNet/IP is stored in RAM, so the data will be erased when the control power is turned off.  
If you want to retain the data, execute the maintenance command "Bulk write to non-volatile memory."

\[Note\]

- The non-volatile memory can be written to approximately 100,000 times.
- Implicit messages are not saved to non-volatile memory even if you execute "Bulk write to non-volatile memory." They are only saved to RAM.

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