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4.4.4.Map Descriptor Example 1 – Simple Read.
In this example we read 10 Analog Inputs from a DNP device. The request is with respect to inputs 20 to 29 and we will place the results of the read in the data array called DA_AI3 in positions 20 to 29. In this example the dnpSubType is not specified so the driver will report the value of the object.
//Client Side Map Descriptors
Map_Descriptors |
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Map_Descriptor_Name | ,Data_Array_Name ,Data_Array_Offset | ,Function | ,Node_Name | ,Address | ,Length | ,Scan_Interval | ,dnpDataType | ,dnpDataVari | |
A1 | ,DA_AI3 | ,20 | ,Rdbc | ,Node_A | ,20 | ,10 | ,5 | ,30 | ,1 |
Any useful name. Duplicates are allowed but may make some of the validation messages less meaningful.
The results of the read are placed in this data array.
The value of the first analog input read will be placed in position 20 of the data table (the 21st element of the table.)
This Map | Read Analog Inputs in |
Descriptor will | the slave device starting |
perform a read of | at input index 20. |
the DNP device | Vendor documentation |
and the read will | will tell you the indices of |
be performed | the inputs you are |
continuously. | interested in. |
This is the name of the node that we are reading. This name must connect to a node definition in the CSV file which will contain the address of the device being read and this in turn should connect to a port definition though which the FieldServer will communicate with the DNP device.
DNP Object Variation is 16 Bit Analog Input
DNP Object Type is Analog Input
Every 5 seconds.
Read 10 elements.
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