COMMUNICATIONS GUIDE
MODBUS MEMORY MAP
469 MOTOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE
109
Format Codes
The data formats used in the Modbus memory map are shown below.
Table 8: Data Formats (Sheet 1 of 15)
CODE
TYPE
DEFINITION
F1
16 bits
UNSIGNED VALUE
Example: 1234 stored as 1234
F2
16 bits
UNSIGNED VALUE,
1 DECIMAL PLACE
Example: 123.4 stored as 1234
F3
16 bits
UNSIGNED VALUE,
2 DECIMAL PLACES
Example: 12.34 stored as 1234
F4
16 bits
2’s COMPLEMENT SIGNED VALUE
Example: –1234 stored as –1234 (i.e. 64302)
F5
16 bits
2’s COMPLEMENT SIGNED VALUE
1 DECIMAL PLACES
Example: -123.4 stored as -1234 (i.e. 64302)
F6
16 bits
2’s COMPLEMENT SIGNED VALUE
2 DECIMAL PLACES
Example: –12.34 stored as –1234 (i.e. 64302)
F7
16 bits
2’s COMPLEMENT SIGNED VALUE
3 DECIMAL PLACES
Example: –1.234 stored as –1234 (i.e. 64302)
F8
16 bits
2’s COMPLEMENT SIGNED VALUE
4 DECIMAL PLACES
Example: -0.1234 stored as -1234 (i.e. 64302)
F9
32 bits
UNSIGNED LONG VALUE
1st 16 bits
High Order Word of Long Value
2nd 16 bits
Low Order Word of Long Value
Example: 123456 stored as 123456
(i.e. 1st word: 0001 hex, 2nd word: E240 hex)
F10
32 bits
UNSIGNED LONG VALUE, 1 DECIMAL
PLACE
1st 16 bits
High Order Word of Long Value
2nd 16 bits
Low Order Word of Long Value
Example: 12345.6 stored as 123456
(i.e. 1st word: 0001 hex, 2nd word: E240 hex)
F11
32 bits
UNSIGNED LONG VALUE, 2 DECIMAL
PLACES
1st 16 bits
High Order Word of Long Value
2nd 16 bits
Low Order Word of Long Value
Example: 1234.56 stored as 123456
(i.e. 1st word: 0001 hex, 2nd word: E240 hex)
F12
32 bits
2’s COMPLEMENT SIGNED LONG
VALUE
1st 16 bits
High Order Word of Long Value
2nd 16 bits
Low Order Word of Long Value
Example: -123456 stored as -123456
(i.e. 1st word: FFFE hex, 2nd word: 1DC0 hex)
F13
32 bits
2’s COMPLEMENT SIGNED LONG
VALUE, 1 DECIMAL PLACE
1st 16 bits
High Order Word of Long Value
2nd 16 bits
Low Order Word of Long Value
Example: -12345.6 stored as -123456
(i.e. 1st word: FFFE hex, 2nd word: 1DC0 hex)
