Section 1 Overview 1-3 Communicating with the Host
1-23
NS Series Programming Manual
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Internal memory cannot be read and written from the host.
System Memory
System memory is used to change information between the host and the PT, such as controlling the
PT and notifying the host of PT status.
The system memory is divided into two sections.
Memory Contents
$SB System Bit Memory
The system bit memory contains 64 bits with predefined functions.
$SW System Word Memory
The system word memory contains 41 words with predefined functions.
The functions for each $SB and $SW address are outlined on the following tables.
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System memory can be allocated as host addresses or as internal memory.
Refer to the System Settings and Project Properties in the CX-Designer Online Help for details
on setting methods.
♦
The NS-series PT will automatically update the system memory wherever it is allocated. The
update timing will be different depending on whether $SB or $SW is used directly or whether an
address in the allocated memory is used.
$SB
Address Operation Classification
0 Operation Signal (Pulse)
Repeatedly turns ON and OFF during PT operation.
1 Operation Signal (Always ON)
Always ON during operation.
2
Screen Switch Strobe ON: Switches screen, OFF: System turns OFF
automatically after screen switched.
NS status notification
3
System Menu Change Prohibit
(ON: Prohibited, OFF: Enabled)
NS status control
4 Battery Low NS status notification
5 Numeral and Character Input Detection
ON: Inputting, OFF: Not inputting
NS status notification
6 Backlight Brightness Adjustment (High)
(Adjusted when ON.)
7 Backlight Brightness Adjustment (Middle)
(Adjusted when ON.)
8 Backlight Brightness Adjustment (Low)
(Adjusted when ON.)
NS status control
9 Backlight Control (Screen Saver Start/Cancel) NS status control
10
Backlight Flash Control
ON: Flash, OFF: Lit
NS status control
11
Backlight Status
ON: Not lit, OFF: Lit
NS status notification
12 Continuous Buzzer
(ON: Buzzer ON, OFF: Buzzer OFF)
NS status control
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