Issue
How to format the disk on chip of a CM3000 or CM4000 series meter

Product Line
CM3000
CM4000

Environment
Configuring Hardware

Cause
When formatting of the chip is required

Resolution
Caution: Remember that if this CM is host to an ECC21 that all web pages will be lost.

The procedure to format the DOC is as follows. Using a modbus read/write utility:

1. Setup Command Result Pointers:
   • Write 8020 to register 8017
   • Write 8021 to register 8018
   • Write 8022 to register 8019
2. Write 9020 to register 8000 to open an editing session.
3. Verify commands:
   • Verify register 8017 reads 9020
   • Verify register 8018 reads 0
4. Write 7010 to register 8000 to format the DOC
5. Verify commands:
   • Verify register 8017 reads 7010
   • Verify register 8018 reads 0
6. Write 1 to register 8001 to save changes.
7. Write 9021 to register 8000 to close the editing session.This will cause a meter reset and the DOC will be formatted after the meter is reset

Note: After formatting the DOC, all files must be reconfigured using ION Setup or PME.

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