Omron NT21 Reference Manual page 382

Enabling/Disabling PT Operations
Controlling the Enabling/Disabling of PT Side Operation by Operation at the PT
Status Control Area
Setting
Operation
15 14 13 12 11 10 9 8
0
Use this method to enable and disable PT operations from the host. PT opera-
tions that can be controlled include opening windows, inputting numeric values
and character strings, and switching screens.
Words must be allocated for the PT status control area in the host. No special
settings are required for reading the operation at the PT.
Bits used to control the PT status (PT status control bits) are provided at the
fourth word (word n + 3) from the beginning in the PT status control area.
Bit 6: Enabling/disabling the PT side window opening
Bit 5: Enabling/disabling the inputting of numeric values and character strings
Bit 4: Enabling/disabling the PT side screen switching
7 6 5 4 3 2 1 0
0
To control the operation by the PT while it is running, operate the PT status con-
trol area in the manner shown below.
Change the setting of the bits in the fourth word (word n + 3) from the beginning in
the PT status control area as indicated below according to the required control.
word n + 3
Bit 6: To control the PT side window opening
Bit 5: To control the inputting of numeric values and character strings
Bit 4: To control PT side screen switching
To disable operation:
To enable operation:
Bit
Controlled Item
Screen display
15
Processing priority registration (for NT link (1:N))
14
Continuous buzzer
13
Intermittent buzzer (short)
12
Display history initialization
11
Not used
10
Intermittent buzzer (long)
9
Backlight mode
8
Screen printing
7
PT window opening
6
Numeral/character string input
5
PT screen switching
4
Memory table copy execution
3
Memory table copy type
2
Alarm history initialization
1
Not used
0
Bits 2 and 3 are not used when the PT is in NT20S or
NT30/620 compatible mode.
Bit 7 is not supported by the NT21.
1 (ON)
0 (OFF)
Section 3-12
1 (ON) 0 (OFF)
Performed Not performed
Registered Canceled
Sounded Stopped
Sounded Stopped
Performed Not performed
Always 0
Sounded Stopped
Lit Flashing
Performed Not performed
Disabled Enabled
Disabled Enabled
Disabled Enabled
Performed Not performed
Numeral Character string
Performed Not performed
Always 0
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