A.1.2.2 System Data Area (Memory Link Method)

This shows the contents of write data in each address of the System Data Area.

System Data Area Structure

Details About Each Address - System Area

• Reserved

Addresses "0", "2", "9", and "14" are reserved.

• Status

Monitor only the necessary bits. Reserved bits are sometimes used for display unit system maintenance, so do NOT turn them ON/OFF.

*1 Even if you use GP-Viewer EX to operate the Data Display part, the bit does not change.

• Error Status

When an error occurs in the display unit, the corresponding bit turns ON. After the bit turns ON and the power turns OFF, the status is maintained until the GP changes from offline mode back to active mode.

• Clock Data (Current)/Set Value

Whatever the value, it will be stored in BCD, in top bits 0 to 7.
[Year] is the 2 digits of the year, [Month] is 2 digits from 01 to 12, [Day] is 2 digits from 01 to 31, [Hour] is 2 digits from 00 to 23, and [Minute] is 2 digits from 00 to 59.

For example, 2005, October 19, 21:57

• Year→Write "0005" to Word Address "4"

• Month→Write "0010" to Word Address "5"

• Day→Write "0019" to Word Address "6"

• Hours→Write "0021" to Word Address "7"

• Minutes→Write "0057" to Word Address "8"

• Interrupt Output (When touch is OFF)

If writing to a Word Switch (16 bit), when you take your finger off the Switch, the bottom 8 bits are output as an interrupt code. (Control code "FFh" is not output.)

• Control

*1 The combination of settings to control the buzzer is as follows.

• Screen Display ON/OFF

Shows the screen when the value is "0000h" and hides the screen when the value is "FFFFh". Do not use any values except "0000h" or "FFFFh". If you touch the screen while the screen is hidden ("FFFFh" is set), although touch operations such as switches do not operate, the screen reappears ("0000h" is set).

• Interrupt Output (When touch is ON)

If you write using a Word Switch (16 bit), on touch the bottom 8 bits are output from the display unit to the host as an interrupt code.

• Change-To Screen / Current Screen

Set the Change-to Screen Number. The setup range differs depending on the [Data Type of Display Screen Numbers] option, available from the [System Settings], [Display Unit] link, in the [Display] tab's [Screen Settings] area.

Data type is Bin: 1...9999

Data type is BCD: 1...7999

To use direct access and memory link methods together, from the [System Settings] window click [Display Unit], and in the [Display] tab select the [Reflect in Device/PLC] check box.
If the [Reflect in Device/PLC] is not set, the screen change using the memory link method will be disabled because even if you write a screen number to the address "0015" using memory link method, the value will be changed to LS0008 by communicating using direct access method right away. In addition, screen change using LS0008 is not reflected to the mapped device/PLC's System Data Area [Change-To Screen]. As a result, screen changes may not be available from the device/PLC. (Unable to return to the screen before switching)
If you are not setting the [Reflect in Device/PLC] option, design the system to clear the change screen number to zero after screens are changed.
There is a method to change screens by force when you cannot change screens from the device/PLC side.
Turn ON the top bit (forced screen change bit) in the mapped device/PLC's System Data Area [Change-To Screen] address, and use the other bits to define the change to screen number. (In other words, enter the screen number you want to display plus 8000(h) in the address.) While the force screen change bit is ON, you cannot use touch operations to change screens. However, you can use the system variable #H_ChangeScreenNo to change screens.

• Window Control

Controls the window display. 
12.7.2 Window - Word Action / Basic

• Window Number

Stores the Global Window's registration number selected indirectly: 1 to 2000 (BIN/BCD)

• Window Display Position

Stores the Global Window's top-left display position, selected indirectly. The data type is BIN or BCD.