Siemens SITRANS LR 300, Инструкция по эксплуатации, Страница: 87 / 140

7ML19985CL02 SITRANS LR 300– INSTRUCTION MANUAL Page 85
mmm
mm
Communicat
ions
The parameters are usually all read/write. However, before a parameter can be read or
written to, the format (where decimal place is) and the indexes must be defined.
Format Word (R43,997)
Format Word is an unsigned integer that contains a value that represents a certain
decimal offset.
The decimal offset indicates how the remote system must interpret the integer value that
is stored in the parameter access register. The following table shows how different
parameter values can be shown based on a register value (integer) of
1234
.
Examples of using the Format Word for both the index values and the decimal offset value
are shown below:
Decimal Offset Example
0 0 1,234
1 -1 12,340
2 -2 123,400
3 -3 1,234,000
4 -4 12,340,000
5 -5 123,400,000
6 +1 123.4
7 +2 12.34
8 +3 1.234
9 Percent 12.34%
Format Decimal
0 0
3 3 right
8 3 left
9 percent
Notes:
• Parameter P999 is read only.
• Parameter P999 (Master Reset) cannot be used via Modbus.
• See Data Types on page 87 for a description of the different types of data
associated with different parameters
SITRANS LR 300.book Page 85 Monday, June 10, 2002 7:18 PM