5-13
When the host selects a stored screen, the Displayed Screen is still available for user input:
•
Touch reports sent to the host as a result of touchkey activity or in response to the Read
Touchkey Status command reflect the touchkeys that are part of the Displayed Screen.
•
All automatic visual or audible responses associated with user activation of touchkeys still
occur even while the Displayed Screen is not selected.
•
Keyboard input that occurs while a stored screen is selected is still sent to the host, as long as
the keyboard is not locked out. If Send-Receive Mode is reset (local echo is on), user input is
echoed to the Displayed Screen, regardless of which screen the host has selected for editing.
If Send-Receive Mode is set (local echo is
off),
user input cannot appear on the Displayed
Screen unless the host selects the Displayed Screen with the Select Screen command and
explicitly echoes characters to the TCS.
(',7,1*6&5((16
When a stored screen is selected it is always placed into volatile memory and remains there as
long as the display is selected. A side effect is that the screen can be lost if power goes down
while it is selected. In such a case, when power returns, the screen’s contents are restored to their
state immediately prior to being selected. If a stored screen is being selected for the first time, it
is restored with default values as if it had just been initialized by the Initialize Screen command.
To minimize the chances of losing the selected screen due to power loss, leave a stored screen
selected only while editing it. When editing is finished, immediately select the Displayed Screen
or another stored screen to protect the edited screen. Selecting a different screen causes the
currently selected stored screen to be transferred back into nonvolatile memory where it is again
safe from power loss. To avoid the possibility of losing a complex screen that will require a
significant amount of time to rebuild, use the Copy Screen command periodically during editing
to perform intermediate saves to a stored screen of a different number.
'()$8/7
The Displayed Screen is selected.
23(5$72586$*(
None. (This is a remote command only.)
+26786$*(
<ESC>[2;<Pscr>s
<Pscr> is a numeric parameter from 0 through 256 that specifies the number of the screen to
select. The Displayed Screen is 0 and a stored screen is non-zero.
If <Pscr> is 0 or omitted, the Displayed Screen is selected; this is the way the TCS
operates if the host has never sent a Select Screen command.
Содержание Dynapro ET TCS
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Страница 314: ...ASCII Code Custom Character Pattern Chart ASCII Code ASCII Code ASCII Code...