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WORD [0:15]. Represents a 16-bit word that may be
divided to contain several items. Bits 0 through 15 are
arranged right-to-left, with bit 0 on the right.
Example: Refer to register number 41320, the System
Start Date. Bits 0 through 4 contain the date of the
month, 0--31, represented in binary format. Bits 5
through 8 contain the month, 1--12. Bits 9--15 give the
year, starting with the year 2000 (number 0) and
extending through 2127 (number 127). For example,
the 10th of February, 2025, would be represented as
shown Figure 2-2.
Ranges and Bits. Some registers list a range of items
with a bit set for each item. Interpret the first number in
the range as corresponding to Bit 0 and the last number
in the range as corresponding to Bit 15.
6
Section 2 Modbus Registers
Bit 15
0
0
1
1
0 0 0
1
Year
Figure 2-2 16-Bit Word Containing the Date
10 February, 2025 (See the example)
Bit 0
0
1
0
0
1 1
0
0
Month
Day
tp6208
TP-6208 4/03
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