37.6.4 When Running Screen Operations

Synchronous Mode

Screen Change (Enable/Disable)	Write from GP-Viewer EX	GP-Viewer EX operation
○	○	Operations on GP-Viewer EX are reflected by the display unit. Note that only the displayed screen is the same, and that not all operations are synchronized. For example, for alarm display operations, the scroll position between the display unit and GP-Viewer EX may be different.
×	○	You can view the current screen on the display unit and change device address values, but you cannot initiate screen change operations. However, if a change in a device address value triggers the screen change operation, then the display unit will change screens, and the GP-Viewer EX screen will follow suit.
○	×	Remote display of the display unit screen. On screen change, an authentication screen displays. If authentication is successful, you can change screens from GP-Viewer EX. Successful authentication allows change screen operations with the connection, as well as write operations from GP-Viewer EX.
×	×	Remote display of the display unit screen. Operations are not allowed. Changing screens on the display unit also changes screens in GP-Viewer EX.

Asynchronous Mode

Screen Change
(Enable/Disable)

Write from GP-Viewer EX

GP-Viewer EX operation

O or X

(Does not depend on the screen change settings)

○

You can use GP-Viewer EX to display a different screen from the display unit, to enable daily monitoring. If maintenance is required, login with the appropriate security level, and write values to device addresses.

O or X

(Does not depend on the screen change settings)

For maintenance purposes, you can remotely monitor the screen. No operations or changes are possible. Always displays the defined screen for daily monitoring.