OFS Polling Rate

OFS polling rate is a value defined globally for each following event source type:

  • BME P58 •••• CPU internal variables.

  • PLC local BMX ERT 1604 T modules and Modicon X80 Ethernet remote I/O BMX ERT 1604 T modules.

  • Modicon X80 Ethernet remote I/O BM• CRA 312 10 modules.

NOTE: OFS polling rate setting has to be validated using the OFS Time Stamp Helper Tool in order to check that the normal average number of time stamped events estimated by the user can be read and that the capability of the system is not exceeded.

OFS Client Alive Timeout

OFS client alive timeout allows OFS to detect that the OFS client is not responding.

If OFS client is not responding, the event group is deactivated and OFS stops reading events in the sources. For that reason, make sure to configure a client alive timeout value not equal to 0 in order to activate this function.

Client alive timeout value is set between 2...30 s. Timeout value is determined by the customer.

For more details on setting client alive service in OFS, refer to Client-alive Service chapter in OPC Factory Server User Manual.

NOTE: Events notified to the client are lost if the client has no time to process or back up the notified values before it disappears.

The following figure shows OFS Configuration Tool menu accessed to set the client alive timeout value: