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4.5.Client Side Map Descriptors
Map Descriptors control when and how data is transferred to or from the Profibus slaves.
Column Title | Function | Legal Values |
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Map_Descriptor_Name | Name of this Map Descriptor | Up to 32 alphanumeric characters |
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Data_Array_Name | Name of Data Array where data is to be stored | One of the Data Array names from | “Data Array” |
in the FieldServer | section above |
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Data_Array_Offset | Starting location in Data Array | 0 to maximum specified in “Data Array” section above | |
Function | Function of Client Map Descriptor | RDBC, WRBC |
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Node_Name | Name of Node to fetch data or write data to | One of the node names specified in | “Client Side |
Nodes” above |
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Data_Type | Data type | FLOAT, WORD, BYTE, BIT |
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DP_Buffer | Specify buffer in the DP card being accessed. | Input, Output |
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| Address in DP_Buffer being accessed, |
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Address | Note: When using Data_Type BIT, the address is in | ||
| expressed in byte offset | bit e.g. from 0 - 1951 |
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Length | Number of points in DP_Buffer being accessed, | 1- 1952, depending on Data_Type |
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expressed in points defined by Data_Type | e.g. when Data Type is WORD and length is 10, it | ||
| means that 10*2 = 20 bytes are used in the buffer | ||
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Example |
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//Client Side Map Descriptors
Map_Descriptors |
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Map_Descriptor_Name, | Data_Array_Name, | Data_Array_Offset, | Function, | Node_Name, | DP_Type, | DP_Buffer, | Address, | Length |
FLOAT_IN_01, | DA_FI_01, | 0, | WRBC, | PDP_01, | FLOAT, | Output, | 0000, | 20 |
INT_IN_01, | DA_AI_01, | 0, | WRBC, | PDP_01, | WORD, | Output, | 0080, | 20 |
BYTE_IN_01, | DA_BI_01, | 0, | WRBC, | PDP_01, | BYTE, | Output, | 0120, | 20 |
BIT_IN_0,1 | DA_DI_01, | 0, | WRBC, | PDP_01, | BIT, | Output, | 0140, | 32 |
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FLOAT_OUT_01, INT_OUT_01, BYTE_IN_01, BIT_IN_01,
DA_FO_01, | 0, | RDBC, | PDP_01, | FLOAT, | Input, | 0000, | 20 |
DA_AO_01, | 0, | RDBC, | PDP_01, | WORD, | Input, | 0080, | 20 |
DA_BO_01, | 0, | RDBC, | PDP_01, | BYTE, | Input, | 0120, | 20 |
DA_DO_01, | 0, | RDBC, | PDP_01, | BIT, | Input, | 0140, | 32 |
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