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16.4 MODBUS MEMORY MAP 16 COMMUNICATIONS
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16.4.3 MEMORY MAP DATA FORMATS
Table 16–16: MODBUS MEMORY MAP DATA FORMATS (Sheet 1 of 24)
TYPE VALUE / BIT
MASK
DESCRIPTION
F1 UNSIGNED VALUE
Example: 1234 stored as 1234
F2 UNSIGNED VALUE, 1 DECIMAL PLACE
Example: 123.4 stored as 1234
F3 UNSIGNED VALUE, 2 DECIMAL PLACES
Example: 12.34 stored as 1234
F4 2's COMPLEMENT SIGNED VALUE
Example: -1234 stored as -1234
F5 2's COMPLEMENT SIGNED VALUE, 1 DECIMAL PLACE
Example: -123.4 stored as -1234
F6 2's COMPLEMENT SIGNED VALUE, 2 DECIMAL PLACES
Example: -12.34 stored as -1234
F7 UNSIGNED LONG VALUE (32 bits)
High order word of long value stored in 1st 16 bits
Low order word of long value stored in 2nd 16 bits
Example: 123456 stored as 123456
F8 UNSIGNED LONG VALUE, 1 DECIMAL PLACE (32 bits)
High order word of long value stored in 1st 16 bits
Low order word of long value stored in 2nd 16 bits
Example: 12345.6 stored as 123456
F9 UNSIGNED LONG VALUE, 2 DECIMAL PLACES (32 bits)
High order word of long value stored in 1st 16 bits
Low order word of long value stored in 2nd 16 bits
Example: 1234.56 stored as 123456
F10 2's COMPLEMENT SIGNED LONG VALUE (32 bits)
High order word of long value stored in 1st 16 bits
Low order word of long value stored in 2nd 16 bits
Example: -123456 stored as -123456
F11 2's COMPLEMENT SIGNED LONG VALUE, 1 DECIMAL PLACE (32 bits)
High order word of long value stored in 1st 16 bits
Low order word of long value stored in 2nd 16 bits
Example: -12345.6 stored as -123456
F12 2's COMPLEMENT SIGNED LONG VALUE, 2 DECIMAL PLACES (32 bits)
High order word of long value stored in 1st 16 bits
Low order word of long value stored in 2nd 16 bits
1 2 3 4 5 6 7 8 9
For explanation of Table footnotes, see page 16–83.
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