FS-8700-49_Data_Aire_DAP Page 31 of 48
Appendix B.8. Advanced Map Descriptor Example 4: - Using DA_Assoc
// Client Side Map Descriptors |
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Map_Descriptor_Name, | Data_Array_Name, | Data_Array_Offset, | Function, | Node_name | Address | Length | DA_Func | DA_Field | DA_Assoc | Scan_Interval |
A1, | DA_AI3, | 0, | RDBC | Node_A, | 0, | 1, | All, | 1 | 5 | |
A2, | DA_AI3, | 1, | passive, | Node_A | 0, | 1, | alm_delay_1, | 1 | 5 | |
A3, | DA_AI3, | 2, | passive, | Node_A | 0, | 1, | alm_delay_2, | 1 | 5 | |
A4, | DA_AI3, | 3, | passive, | Node_A | 0, | 1, | alm_delay_3, | 1 | 5 | |
A8, | DA_AI4, | 0, | WRBC, | Node_A | 0, | 1, | nom_h_setpt, | 2 | 5 | |
A9, | DA_AI4, | 1, | passive, | Node_A | 0, | 1, | t_setpt,, | 2 | 5 | |
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A 'Read' and some passive Map Descriptors to extract other data fields from the same read. (optimizes communications)
Read must precede the passive's.
Potential confusion for the FieldServer because the node and the DA_Func's are the same for all the Map Descriptors.
Solve this problem using DA_Assoc.
DA_Assoc associates the passives with the correct active Map Descriptor. Map Descriptors A2, 3, 4 are associated with A1 by the value of DA_Assoc=1
Map Descriptor A9 is associated with A8 by the value of DA_Assoc=2
Appendix B.9. Advanced Map Descriptor: Example 5 - Using a special / diagnostic command.:
//Client Side Map Descriptors
Map_Descriptor_Name, | Data_Array_Name, | Data_Array_Offset, | Function, | Node_Name, | Address, | Length, | DA_Func, | Scan_Interval |
A1, | UNUSED_ARRAY, | 0, | WRB, | No_Node, | 0, | 1, | 5 | |
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A Data Array must be associated with the Map Descriptor even though it will not be used. It may be any data type.
This command is sent only once. To do this periodically change this to wrbc.
Must connect this Map Descriptor to a node whose Node_ID is zero. For example.
Nodes |
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Node_Name, Node_ID, Protocol, | Port | ||
Unit1, | 0, | Daire, | R1 |
This is a special / dianostic command. It causes a one byte message to be sent.
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