CIRCUTOR OPC Server PS/PSS - Manual (Page 18)

PS/PSS OPC Server -18-
Is posible to configure several conections with different servers of PowerStudio and
configure for y configurar de forma independiente los dispositivos a los que se tendrá
acceso para cada servidor de PowerStudio, tan solo es necesario introducir los
parámetros de conexión para cada servidor y pulsar sobre el botón
para incorporar los nuevos dispositivos a la lista de
dispositivos disponibles.
3.7.2.- OPC Configuration
These are the most important fields because they determine the behaviour of the
OPC server and directly affect its efficiency. Incorrect configuration values can cause the
server to become frozen or making it incapable of serving the values of the variables
requested by the OPC clients. On the other hand, if these fields are correctly adjusted to
your particular needs, the server's operation can be optimised and the strain on the system
resources can be considerably reduced.
If a large number of variables (more than 2,000) are being handled, you are
recommended to start with long update times.
It is essential to read the manual, and in particular point
3.1 , before modifying the
values of these fields.
OPC configuration details form
‘Optimise OPC response time’: If this option is selected, the server will make
continual requests to PowerStudio and will ignore the buffer expiration time. This will allow
you to work with much shorter update times but with an increased strain on the system
resources.
‘Optimise system resources’: If this option is selected, the buffer will be used in
order to reduce the number of requests made to PowerStudio. This implies longer update
times but a reduced strain on the system resources. When this option is selected, the
“Request management” and “Buffer expiration” fields will be activated.
‘Buffer expiration’: This allows you to set the amount of time during which the values
of the variables read from PowerStudio remain valid.
‘Update frequency’: This allows you to set the minimum update time for the
variables monitored via the OPC server for any of the operating methods.