Real Time Automation, Inc.
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Configure Read and Write Data Groups
Follow these steps to manually configure read or write data groups.
1)
Select
View Read Data Groups
or
View Write Data Groups
if not already selected.
2)
Select a
Point Type
for each scan line. Options include: Coil Status, Input Status, Input Registers, and
Holding Registers.
Note
: Input/Holding Registers have a data type associated with them.
a)
String Point Type- If the mating protocol supports strings, you may select string as a point type
in Modbus. With this point type, 2 characters will be packed into a single register and the first
register will be set aside for the length.
b)
EX: 4x Hold Reg (String) with a Starting Address of 1 for a length of 5 Registers.
This means that Register 1 will hold the length of the string and Registers 2-5 will hold the string
contents. This string can contain a max of 8 characters.
3)
Enter a
Starting Address
(1-based).
4)
Enter the
# of Points
to read or write. This will allocate the number of the data type selected.
