Driver Manual |
3.2.4 Server Side Map Descriptors
Section Title |
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Map_Descriptors |
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Column Title | Function | Legal Values |
Map_Descriptor_Name | Name of this Map Descriptor | Up to 32 |
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| alphanumeric |
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| characters |
Data_Array_Name | Name of Data Array where | One of the Data Array |
| data is to be stored in the | names from “Data |
| FieldServer | Array” section above |
Data_Array_Offset | Starting location in Data | 0 to maximum |
| Array | specified in “Data |
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| Array” section above |
Function | Function of Client Map | Server |
| Descriptor |
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Node_Name | Name of Node to fetch data | One of the node |
| from | names specified in |
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| “Client Node |
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| Descriptor” above |
Address | Starting address of read block | 40001, 30001, etc |
Length | Number of items to read | 1 - 125 |
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Data_Array_Low_Scale* | Scaling zero in Data Array | |
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| default 0 |
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Data_Array_High_Scale* | Scaling max in Data Array | |
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| default 100 |
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Node_Low_Scale* | Scaling zero in Connected | |
| Node | default 0 |
Node_High_Scale* | Scaling max in Connected | |
| Node | default 100 |
3.3Examples of FieldServer setup for typical clients MSTR Example: Modbus Plus Node
This example shows a Modicon Modsoft screen for an MSTR function in a Modbus Plus node. It writes one register of data to a virtual node in the FieldServer.
HThe MSTR Function Code specifies a Write operation
HOne register of data is to be transferred
HThe destination register is 40000 (addressed as register 1).
HThe FieldServer’s node address is 1. Note that the decimal value 1025 equals 0401 hexadecimal, addressing a Modbus Plus Network Option Module (NOM) in backplane slot 04 and a node at address 01.
HThe destination index is 28. The FieldServer will forward the message to the TCP node whose IP address is in this location in the FieldServer’s TCP Mapping table.
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