Appendix 10 System Memory List
Address Classification Function
$SB41 Control Log Macro Operation
$SB42 Notification/control Initialize Error Log
$SB43 Notification/control Save Error Log
$SB44 − Reserved
$SB45 Control Macro error dialog control
$SB46 Notification Notification of Macro Error
$SB47 Notification Logging Process or Video Capture Error Flag
$SB48 Notification Memory Card Free Space Check Flag
$SB49 Notification/control Stop Memory Card
$SB50 Notification Memory Card Removing Status
$SB51 Notification Periodical Data Log Save in Process Flag
$SB52 Notification Data Block Operation Complete Flag
$SB53 Notification/control Prohibit Starting of the Screen Saver
$SB54 Notification Password level 1 operable status
$SB55 Notification Password level 2 operable status
$SB56 Notification Password level 3 operable status
$SB57 Notification Password level 4 operable status
$SB58 Notification Password level 5 operable status
$SB59 − Reserved
$SB60 − Reserved
$SB61 − Reserved
$SB62 − Reserved
$SB63 − Reserved
The notification words are not write prohibited. In addition, the system will not restore values,
except when the status has changed.
System memory is allocated to PLC areas as shown below.
Allocated Addresses for System Memory can be displayed by selecting PT – System Set-
tings in the CX-Designer and clicking the Initial Tab.
$SB + m
15
31
47
0
16
32
Word m: $SB0 to $SB15
Word m
+1: $SB16 to $SB31
Word m+2: $SB32 to $SB47
Word m+3: $SB48 to $SB63
63 48
System Word Memory ($SW)
System word memory ($SW) is used for exchanging information between the host and the
PT in word units, such as controlling the PT and notifying the host of PT status.
The system word memory contains 40 items with predefined functions.
The system word memory is listed in the following table.
Address Classification Function
$SW0 Notification/control Current screen number
$SW1 Notification/control Display pop-up screen 1 number
$SW2 Notification/control Pop-up screen 1 display position (X coordinate)
$SW3 Notification/control Pop-up screen 1 display position (Y coordinate)
$SW4 Notification/control Display pop-up screen 2 number
$SW5 Notification/control Pop-up screen 2 display position (X coordinate)
$SW6 Notification/control Pop-up screen 2 display position (Y coordinate)
$SW7 Notification/control Display pop-up screen 3 number
$SW8 Notification/control Pop-up screen 3 display position (X coordinate)
A-58
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