Omron Programmable Terminals NT31 NT31C User Manual
Page 223
6-11
Section
System Maintenance
213
Reference:
S The functions of touch switches pressed during the I/O check are not notified
to the host.
S The check cannot be performed until the touch switch at the top right corner is
displayed in reverse video (for NT31) or displayed in yellow (NT31C). Start the
check after the status of the touch switch at the top right corner has changed.