Omron NS Programming Manual page 68

Section 2 NS Series Functions
NS Series Programming Manual
$SB0 will not turn OFF and ON if no communications between $SB0 and the allocated address is set
in the CX-Designer system settings.
Status
System Menu
(including device monitor)
Transfer
Error (See note.)
Start
Screen saver
Note: An error dialog box (X dialog box) is displayed.
RUN Signal (Always ON) ($SB1)
$SB1 notifies the host memory and PT memory that the PT is operating (normal operation on normal
screens.) During operation, $SB1 turns ON according to the interval set for RUN signals (pulses) in the
$SB and $SW.
$SB1 will not turn ON if no communications between $SB1 and the allocated address is set in the
CX-Designer system settings.
Status
System Menu
(including device monitor)
Transfer
Error (See note.)
Start
Screen saver
Note: An error dialog box (X dialog box) is displayed.
If the status is changed to System Menu, transfer, or another status, the notification will stop but OFF
notification will not be made before the status change.
$SB/$SW
refresh timing
Notification to host
memory/PT memory
Note
Screen Switch Strobe ($SB2)
$SB2 is for notification of screen switching.
Immediately after the screen is switched, $SB2 is turned ON the next time $SB/$SW is refreshed and
then turned OFF at the following $SB/$SW refresh.
Notification is made when the screen switches to a normal (base) screen.
RUN signal status
Stops notification.
Stops notification.
Stops notification.
Stops notification.
Continues to alternate
ON/OFF notification.
RUN signal status
Stops notification.
Stops notification.
Stops notification.
Stops notification.
Continues to notify ON.
Normal screen
ON ON ON
Include programming that regularly accesses the RUN signal and confirms that the
PT is operating normally.
Restarts notification.
Restarts notification.
Restarts notification.
Starts notification.
Continues to alternate ON/OFF notification.
Operation when status cleared
Restarts notification.
Restarts notification.
Restarts notification.
Starts notification.
Continues to notify ON.
System menu - transfer - error
2-21
2-4 System Memory
Operation when status cleared
Normal screen
ON ON ON