PROFIBUS DP Master Driver Manual
Page 8 of 14
4.5
Client Side Map Descriptors
4.5.1 FieldServer Related Map Descriptor Parameters
Column Title
Function
Legal Values
Map_Descriptor_Name Name of this Map Descriptor.
Up to 32 alphanumeric characters
Data_Array_Name
Name of Data Array where data is
to be stored in the FieldServer.
One of the Data Array names from
“Data Array” section above
Data_Array_Offset
Starting location in Data Array.
0 to (Data_Array_Length-1) as specified
in “Data_Array” section
Function
Function of Client Map Descriptor.
Rdbc, Wrbc
4.5.2 Driver Related Map Descriptor Parameters
Column Title
Function
Legal Values
Node_Name
Name of Node from which to fetch
data.
One of the node names specified in
PROFIBUS_Data_Type Arrangement of buffer data.
Byte, Word, Bool, Float
Address
Starting address of buffer in bytes.
0 - 243
Length
Length of Map Descriptor
3
1 - 244 ( BYTE )
1 - 122 ( WORD )
1 - 1952 ( BOOL )
1 - 61 ( FLOAT )
4.5.3 Timing Parameters
Column Title Function
Legal Values
Scan_Interval
Rate at which data is transferred from FieldServer data arrays to
PROFIBUS Master buffers.
≥0.001s
3
A maximum combined total length of 1536 bytes are permitted for all Map Descriptors accessing Slave devices.
