Redundater Server mit reduntanten Clients - Befhlssperre zwischne Clients

[jusufs]

Hallo.
Beim Befehlsgabe von einem Client muss ich die Befehlsgabe vom zweitem Client sperren.
Erst nach Befehlsausfuhrung kann ein weiteres Befehl ewtl. vom zweitem Client initialisiert werden. Das heisst, dass die beiden Clients miteinander Information (z.B. Windows Enviroment Variable) gegenseitig austauschen mussen.
Bitte um Rat, wie dies realisierbar ist. Kann ich die "user defined status 1-8" im REMA nutzen ? Wie ist der Mechanismus, damit die beiden Clients diese Variable(en) online gegenseitig auslesen konnen.
Bedanke mich fur Hilfe, Link, Beispiel.

Jozef Szabo
Scada 460 6.50 energy user

[jusufs]

Sorry for question, I found maybe a solution in this:
http://www.copadata.com/forums/showt...nd+two+clients

The select bit is set on if a client a element was selected and the command window opens.
The another station receives also this select bit set on the same element and for example white border is blinking.

Fine, but how show I prevent that the command window can't be opened on second client ?
I can't trigger the opening of command window independent of client in such a way, that command window can be opened only if the select bit isn't set, or ....?
Thanks for help.

[markclemens]

you have found the right post already

Yes, the statusbit "NET_SEL" is set automatically for the return variable, when a command window is open. This statusbit change is automatically updated to all PCs running this project through the zenon network.

If the command window is open on another PC for a specific variable, the commands through the context menu for this variable will be grayed out. (to avoid execution of single stage commands)

If the element with the return variable has "set value active" through "commands", the command window will open on other PCs as well after a leftclick on the element, but the action buttons, the execute button and the cancel button are all grayed out.

There is no need to configure anything special for this to work, the transport mechanism is the zenon network.

If the network connection to the server is lost, the command window will open, but again the action buttons and execution button are greyed out. When the connection is re-established, the command screen is updated and the buttons will become available. But only as long as the command window is not open on another PC.

[jusufs]

Hello Marc.
Thanks for nice explanation.