IEC60870_BACKGROUND_SCAN¶
| Parameter | Value |
|---|---|
| Library_File_Name | IEC60870_AC500_V20.lib |
| Firmware | V2.6.x |
| Type | Type_Function_Block_History |
| Group | General |
The background scan allows a monitoring station to report all monitored data without any request.
The data will be sent with a defined delay, so also slow monitoring stations can be handled. The data the monitored station needs to send must be stored within the protocol stack by utilizing SEND_ Function Blocks without any active send reason.
Then on any event the monitored station may start the background scan by executing the IEC60870_BACKGROUND_SCAN Function Block.
If an active connection exists, the monitored station will then send all monitored data to the monitoring station with a send reason “background scan (2)”.
The data types being used are the same as for a general interrogation.
The receiving station must be able to handle the send reason. For AC500_Product_Name this send reason is supported since V2.6 and V3.0.
Also data send actively before will be resend by a background scan. If a monitored station sends actively the monitoring station can only distinguish the received data by controlling the send reason value.