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Appendix B. Advanced Topics
Appendix B.1. Additional Driver Specific Map Descriptor Parameters
The driver offers advanced configuration by adding to and extending the Map Descriptors specific to the Dart Serial Driver.
Column Title | Function | Legal Values | |
| Specifies the Data Aire Command/Query |
| |
| function to be used. Use a function | Numeric/Text. See Appendix B.2 | |
DA_Func* | appropriate to the type of Server | ||
for a list of possible values. | |||
| (DAP/Chiller/DAP80) and the type of data | ||
|
| ||
| required. |
| |
| Specifies the data field to be retrieved from |
| |
| the Server device. Servers are only |
| |
| capable of responding with a data |
| |
| composite consisting of many data fields. | Text. See Appendix B.3 for a list | |
DA_Field* | This parameter is used to specify the | of possible values as well as Table | |
| parameters to be extracted from the data | 4.4.5.1 | |
| composite. |
| |
| Note1. |
| |
| This field is used to make the association |
| |
| between passive and active (rdbc/wrbc) |
| |
| Map Descriptors addressing the same |
| |
DA_Assoc* | node. Give the rdbc and its associated | Any positive integer. | |
passive Map Descriptors the same value | |||
|
| ||
| (any number) and give the wrbc and its |
| |
| passive Map Descriptors another value for |
| |
| DA_Assoc. |
| |
| Used only for connection to DART’s. |
| |
Da_Freq | Specifies in milliseconds the intervals | > 18000 (3 minutes) | |
between wrbc/rdbc Map Descriptor | 30000 (5 minutes) recommended | ||
| |||
| execution. |
| |
| Specifies the extraction method. Such as | See Appendix B.4 for a list of | |
DA_Methodψ | |||
| degree, | possible values. | |
|
| ||
| Specifies the number of bytes that are to |
| |
| be processed by the method specified |
| |
DA_Bytcntψ | above. For method#6 which processes an | >= 1 | |
| array of elements the DA_Bytcnt specifies |
| |
| the number of bytes that constitute each |
| |
| element of the array. |
| |
| An offset into the data composite that is | 0 to the length of the data | |
| returned when the Server is polled. The | ||
DA_Offsetψ | composite. No validation is | ||
| offset is the number of bytes from the first | performed. | |
| data byte. | ||
|
| ||
|
|
| |
DA_Elecntψ | Number of elements that are produced by | >= 1 | |
| the extraction method. |
|
ψThese parameters are only required for custom data extractions not provided for with DA_Field parameter.
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