ProSoft Technology PS-QS-1x10-0781 - Manual (Page 47)

FieldServer Configuration Manual Page 47 of 90
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6.2 Connection Parameters
6.2.1 Node_Retire_Delay
When a FieldServer is started up, it polls all Nodes. Nodes that respond within the specified timeout period
(seconds) will be marked online. Nodes failing to respond within the timeout period will be repeatedly polled for
the length of time specified in the Node_Retire_Delay parameter (seconds). Once this period has expired, there
will be one further poll and if the Node does not respond within the specified timeout period, it will be retired.
The FieldServer must be restarted for retired or new Nodes to be identified. This is an optional parameter. If not
set, the FiledServer will continue retrying indefinitely. This would be useful in a situation where there are plans for
expansion and some Nodes have not yet been installed and so would never respond.
Example
Connections
Port , Timeout , Node_Retire_Delay
P1 , 0.2 , 10
P2 , 0.2 , 10
P3 , 0.2 , 10
Nodes
Node_Name , Node_ID , Protocol , Port , Retry_Interval , Recovery_Interval
Dev1 , 1 , Modbus_RTU , P1 , 0 , 0
Dev2 , 2 , Modbus_RTU , P2 , 0 , 0
Dev3 , 3 , Modbus_RTU , P3 , 0 , 0
6.3 Node Parameters
6.3.1 Node Offline Action .
This function allows the user to clear the values from a Data Array if the associated active connection to a Passive
Node is lost. By default, the last values obtained from the Passive Node will remain in the Data Arrays if the
connection is lost. This functionality has been implemented for the following protocols: BACnet IP, BACnet MSTP,
Lonworks, and Metasys N2. A configuration example follows:
Nodes
Node_Name , Node_ID , Protocol , Port , Address_Type , Node_Offline_Action
PLC_12 , 12 , Modbus_RTU , P1 , ADU , Clear_data_Array
PLC_13 , 13 , Modbus_RTU , P1 , PDU , No_Action