Omron NT21 User Manual

3-3SectionScreen Display and Notification
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3-3 Screen Display and Notification
This section describes the each procedure for changing and checking the
screen displayed by the PT.
Reference: The methods of controlling PT status that are described below are not correct for
PTs in NT20S or NT30/620 compatible mode. Refer to Appendix C for details on
the NT20S and NT30/620 compatible modes (page 451).
3-3-1 Switching the Screen
The PT provides the following four methods for switching the screen.
• Operation at the PT status control area
• Pressing a touch switch that has the Switch Screen function
• Using the screen switching function in the bit memory table
• Using the screen switching function of the alarm list/history function
Switching the Screen by the Operation at the PT Status Control Area
With this method, the screen can be switched to the required screen at the re-
quired time by the command given by the host.
Designated screen
PCPT
← Screen number
PT status control area
Screen switch setting
PT status control setting
Reserved for system use
Copy memory
table entry setting
Words must be allocated for the PT status control area in the host. No special
settings are required for the control of buzzer.
At the beginning of the PT status control area (word n), there is an area (screen
switch setting area) for the screen switching command and screen number noti-
fication.
15 14131211109876543210
Word Bit
n
Screen No. (4-digit BCD or hexadecimal) Screen switch setting
n + 1
Copy source memory table entry
number (4-digit BCD or hexadecimal)
n + 2
Copy destination memory table entry
number (4-digit BCD or hexadecimal)
Copy memory table
entry setting
n + 3
PT status control bits PT status control
n + 4
Reserved for system use
The configuration and functions of these words are different
when the PT is in NT20S or NT30/620 compatible mode.
To switch the screen, operate the PT status control area as indicated below.
Write the screen number of the screen to be displayed at the beginning of the PT
status control area (word n) either in 4-digit BCD or 4-digit hexadecimal. Which
of the BCD or hexadecimal notation should be used is set for Numeral Storage
Type of Tools – PT Configuration – System with the Support Tool.
The screen numbers that can be set are:
• 0000: No display (screen off)
• 0001 to 3999: Screen No. 1 to No. 3999
Setting
Operation

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English