Omron NS

Section 3 Using PTs 3-10 Prohibiting and Allowing PT Operation
3-29
NS Series Programming Manual
3-10 Prohibiting and Allowing PT Operation
Instructions from the host can be used to prohibit and permit NS-series PT operation for the following
functions.
• System Menu movement (system memory operation)
• All screen functional object input (system memory operation)
• Input for each functional object (control flag operation)
3-10-1 Prohibiting and Allowing System Menu Movement
System Menu movement can be prohibited or allowed for NS-series PTs using the following method.
• Prohibit/allow System Menu movement by manipulating system memory bit $SB3.
Controlling System Menu Movement Using System Memory
Change the status of system memory bit $SB3 to prohibit or allow System Menu movement.
Prohibit System Menu movement:
OFF → ON (0 → 1)
Allow System Menu movement:
ON → OFF (1 → 0)
3-10-2 Prohibiting and Allowing Input to All Screen Functional Objects
Input to the whole screen can be prohibited or allowed for NS-series PTs by changing the status of
system memory bit $SB19 or the specified communications address.
Controlling All Screen Functional Object Input Using System Memory
1. Change the status of system memory bit $SB19 to prohibit or allow input to all screen functional
objects.
Prohibit input to screen:
OFF → ON (0 → 1)
Allow input to screen:
ON → OFF (1 → 0)
2. If the screen is touched while input is prohibited, a password dialog box will be displayed. Input the
correct password to enable input to the screen functional objects. $SB19 will automatically turn
OFF. The password level is specified by system memory bit $SW13.
For example, if the content of $SW13 is “3”, a level 3 password must be input.