Dynapro Technologies Dynapro ET TCS, Руководство разработчика приложений

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Saving the Display Activity parameter as OFF (in the Setup Screen) can be mistaken for TCS
failure when the unit is next powered up or reset and there is no display activity. Anytime the
display is unexplainably dark, and remains so after a brief warm-up period, check the Set Up
Screen first. If the TCS is operating properly, the Setup Screen will always display, regardless of
the setting of Display Activity. However, if any operator lockouts are in effect, the Setup Screen
may not be accessible through the keyboard or the SET UP switch and may require a command
from the host, or power to be cycled.
For example, it is possible for the operator to enter the Setup Screen at power up and save
Display Activity OFF. Then a program sets the Setup Lockout Mode (<ESC> [> 5 h). There will
be no display activity, and attempts to enter the Setup Screen are ignored. If this is suspected to
be the case, first reset the Setup Lockout Mode (<ESC> [ > 5 l), or cycle power. Then try again
to enter the Setup Screen. If there is still no display activity, there may be a hardware failure
within the TCS.
Similarly, if Display Activity is saved as OFF, then the host sends a Keyboard Lockout command
(<ESC>[ 2 h), the keyboard Set Up key will not function. However, in this case, the Setup Screen
is still accessible by way of the rear-panel SET UP switch.
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In addition to Display Activity, any other Setup Screen parameters could be selected incorrectly
by an operator. The Setup Lockout command ensures that Setup parameters are not inadvertently
changed, which could result in errors. When Setup Lockout mode is not used, the operator has
access to all the communication parameters (baud rate, stop bits, and so on), and therefore could
disrupt TCS-host communications. Follow these precautions to ensure this does not occur.
1. Make operators aware of the importance of leaving the Setup Parameters as they are.
2. Use the Setup Lockout Mode command early in all programs.
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Touching the display while the TCS is in transition between stored screens or to a new set of
touchkey programming can result in unexpected behavior, specifically:
•
If a stored screen is copied to the Displayed Screen while an automatic visual response is in
progress because a press or auto-repeat touchkey is being pressed, the visual response is
prematurely terminated. In the case of auto-repeat touchkeys, auto-repeating is also
terminated.
•
When a stored screen is copied to the Displayed Screen and the touch panel is pressed
throughout the transition to the new screen, the user’s finger must be lifted and the touch
panel pressed again for any touch reports to be sent or for responses to occur on the new
screen.
The TCS behaves in a manner consistent with the usual expectations of both the programmer and
the user. It is best to avoid using auto-repeat touchkeys to initiate screen copy operations.