Omron Programmable Terminals NT631C - Manual (Page 223)

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System Maintenance Section 6-11
Check the screen data memory by following the menu operation from the Sys-
tem Menu shown below.
• During the check, the message Checking Now... is displayed.
• On normal completion of the check, the message Memory Check OK is
displayed.
• If an error is discovered in the check, the message Memory Check NG is
displayed.
Select Maintenance Mode.
Select I/O Check.
Select Device Check.
Ver 4.12
Select Screen Memory.
Press Execute.