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3 Project Settings Dialog Box
4-30
WindO/I-NV4 User’s Manual
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System Area
Overview
The area of predetermined device addresses to control the screen and communicate error information and time
information between the MICRO/I and the external device is called the System Area.
The System Area on the MICRO/I is as follows.
To use System Area 1 and 2, select the Use System Area check box on the Project Settings dialog box. To use
System Area 3 and 4, select the Use System Area 3, 4 check box.
Specify the word device to use as the System Area in Device Address to allocate the System Area starting at the
configured device address.
Click
to display the Tag Editor. For the device address configuration procedure, refer to Chapter 2 “5.1 Device
Address Settings” on page 2-68.
Example: When Device Address is configured as LDR100
System Area 1
This area configures the MICRO/I display, beep, and clearing bits.
System Area Number of word addresses User Access
System Area 1 2 Read and write
System Area 2 2 Write
System Area 3 4 Read
System Area 4 4 Write
LDR100
LDR101
LDR102
LDR103
LDR104
LDR105
LDR106
LDR107
LDR108
LDR109
LDR110
LDR111
System Area 1
(The address number of Top Device Address)
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
System Area 2
System Area 3
System Area 4
Address
number
Bit Function Description
+0 0 to 15 Display screen number
This bit stores the number of the screen being displayed. Write a value to
this bit to change the screen to that number. Immediately after the power
is turned on, the value configured by Default Screen in the Project
Settings dialog box is stored here.
If the screen number does not exist in the project data, an error message
(No screen data) is displayed. However, when 0 is written to this bit, the
screen is not switched and no error message is displayed.
+1
0 Backlight
This bit stores the illumination state of the backlight. Write a value to this
bit to change the state.
0:
Off
Turns the backlight off.
1: On
Turns the backlight on.
1 Flash display (1 sec. cycle)
This bit stores the screen flash state (1 sec. cycle). Write a value to this
bit to change the state. This bit is 0 immediately after the power is turned
on.
0:
Do not flash
Stop flashing the screen and turn it on.
1: Flash
Flashes the screen in one second intervals.
When the Flash display (1 sec. cycle) (address 1, bit 1) and
the Flash display (0.5 sec. cycle) (address 1, bit 2) are both
1, the screen flashes at one second intervals.