FieldServer FS-8704-13 instruction manual Map Descriptor Example 1 Simple Read, Rdbc =

FS-8704-13 GE-SRTP Driver Manual

4.4.4 Map Descriptor Example 1 – Simple Read.

This example provides a map descriptor to read 10 bytes of Discrete Input states, starting at the very first Discrete Input. The data is stored in a data array called DA_DI and the first input is stored at location 100 in the array (101st element). The PLC is polled every 2 seconds

Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, Scan_Interval, node_name, Address, Length, Data_Type

CMD_AI_01 , DA_AI_01 , 0 , rdbc , 1.0s , Node_A , 1 , 10 , %AI

Map descriptor names may be used in driver error messages. It is not essential, but it is useful to use unique names.

Location in the data	Read will be
array at which the first	performed
element of data will be	every 2.0
stored. The arrays are	Seconds.
zero referenced so an
offset of 100 indicates
the 101st element of
the array.

The node must have been defined previously in the Nodes section of the CSV file.

The address and length specify the first element and the number of elements that must be read from the PLC’s data tables.

GE PLC’s reference data tables starting at element 1.

Data Type. Use the

%symbol as you would if you were programming a GE PLC.

The name of the	RDBC =
data array in	Read Block
which the driver	Continuous.
will store the data.
The name must	The driver
correspond to a	will read data
data array defined	from the PLC
in the data array	continuously.
section of the
CSV file.

The node name connects this map descriptor to a node which in turn connects the map descriptor to a port.

Unless otherwise specified the driver reads bytes and words. This map descriptor reads 10 bytes of data

–covering %I1 to %I79.

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