Omron NT20S Operation Manual page 140

Outline of Functions
Communication through RS-232C
Controllable NT20S functions
Ascertainable operating statuses of the NT20S
Caution:
The NT20S-ST128 can communicate with the host through the RS-232C inter-
face. In other words, it can receive and send commands through the RS-232C in-
terface, which allows various types of host to utilize the functions of the NT20S:
S Control/Notification of display elements
S Control/Notification of the NT20S status
S Memory table operations
S Screen operation
S Display/Deletion of characters/graphics
For details on actual operations, refer to Section 6 "Using the RS-232C"
The following NT20S statuses can be controlled:
S Screen switching: Screen is displayed or cleared.
S Continuous/intermittent buzzer: Buzzer operation is started or stopped.
S Back light mode: Back light is lit or made to flash.
For details on how these NT20S functions are actually controlled, refer to Section
5-4 "NT20S Status Control" on page 191, "Screen Display Control" on page 215,
and "Buzzer Control" on page 215.
The following operating statuses of the NT20S can be ascertained:
S NT20S operating/stopped status: Whether the NT20S is active or inactive
S Screen number: Number of the screen currently displayed
S Numeral setting input: Whether or not numerical values have been input by nu-
meral setting
For details on how these NT20S operating statuses are actually detected, refer to
Section 5-5 "Notification of the Operating Status to the PC (Determining the
NT20S Operating Status)" on page 196, "Screen Number Response" on page
205, and "8-digit Number Input Notify" on page 212.
To ensure system safety, be sure to periodically read the PT operating status bit
from the host in order to ensure that the PT is always operating normally.
Section 4-2
121