System Settings; Memory Switch Setting Screens - Omron NT21 - SETUP MANUAL 10-2001 Setup Manual

System Settings

Checking
Communications
between the NT21 and
the Host
6-9

System Settings

6-9-1 Memory Switch Setting Screens

134
The operation at the start is as follows.
Display of the System Initialization Screen
When establishing the communication with a host, the System initializing char-
acter string is displayed on the screen. If the communication with the host cannot
be established, the System initializing screen remains up. If this is the case,
check the settings at the host and the PT side, the cables and wiring.
In addition, creating screen number 9000 enables the display of a screen other
than the System initialization screen.
Transmission of the Contents of Memory Tables
If the Resume Function memory switch is set to ON, or if the initial values of the
memory tables are used, the contents of the numeral/character-string memory
tables are copied to the allocated words at the host.
↓
Display of the Startup Screen
The startup screen is displayed on reading the contents (screen number of the
screen to be displayed) of the first word of the PT Status Control Area.
If the contents are not correct for a screen number, or there is no data registered
for the set screen number, an error message is displayed.
Execute the host program and confirm that the following operations are per-
formed normally.
• Confirm that the NT21 screens switch in accordance with the host program.
If the screens do not switch correctly, check the connection between the
host and the NT21, and also check if the hardware settings are correct. For
details, refer to Section 4 Connecting to the Host from the RS-232C Port, or
Section 5 Connecting to the Host from the RS-422A/485 Port.
• Confirm that the operation results of touch switch and numeric value/character
string input at the NT21 are sent to the host correctly by displaying the contents
of the host words and bits using a Programming Device (e.g., CX-Program-
mer).
If the results of operations at the NT21 are not sent to the host correctly,
check the setting of the display elements. For details on setting display ele-
ments, refer to the description of each display element in the Reference
Manual.
The NT21 supports a variety of functions that are convenient during operation to
be set with memory switches. This section describes the memory switch settings
relating to the operation environment.
Since the memory switch settings are backed up to the flash memory by the bat-
tery in the NT21, they are not cleared when the power is switched OFF.
There are four memory switch setting screens. The required screen can be dis-
played by using the [ ] (next screen) and [ ] (previous screen) touch switches.
Section 6-9