GE 345

1–128 345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
MODBUS MEMORY MAP CHAPTER 1: COMMUNICATIONS GUIDE
Format Codes
Code Type Definition
F1 unsigned 16 bits UNSIGNED VALUE
Example: 1234 stored as 1234
F1B unsigned 16 bits UNSIGNED VALUE, MAX VALUE = OFF
Example: 1234 stored as 1234
F1C unsigned 16 bits UNSIGNED VALUE, MIN VALUE = OFF
Example: 1234 stored as 1234
F2 unsigned 16 bits UNSIGNED VALUE, 1 DECIMAL PLACE
Example: 123.4 stored as 1234
F2B unsigned 16 bits UNSIGNED VALUE, 1 DECIMAL PLACE, MAX
VALUE = OFF
Example: 123.4 stored as 1234
F3 unsigned 16 bits UNSIGNED VALUE, 2 DECIMAL PLACES
Example: 12.34 stored as 1234
F3B unsigned 16 bits UNSIGNED VALUE, 2 DECIMAL PLACES, MAX
VALUE = OFF
Example: 12.34 stored as 1234
F4 signed 16 bits 2’s COMPLEMENT SIGNED VALUE
Example: -1234 stored as -1234 i.e. 64302
F4B signed 16 bits 2’s COMPLEMENT SIGNED VALUE, MAX VALUE
= OFF
Example: -1234 stored as -1234 i.e. 64302
F5 signed 16 bits 2’s COMPLEMENT SIGNED VALUE, 1 DECIMAL
PLACES
Example: -123.4 stored as -1234 i.e. 64302
F6 signed 16 bits 2’s COMPLEMENT SIGNED VALUE, 2 DECIMAL
PLACES
Example: -12.34 stored as -1234 i.e. 64302
F7 signed 16 bits 2’s COMPLEMENT SIGNED VALUE, 3 DECIMAL
PLACES
Example: -1.234 stored as -1234 i.e. 64302
F8 signed 16 bits 2’s COMPLEMENT SIGNED VALUE, 4 DECIMAL
PLACES
Example: -0.1234 stored as -1234 i.e. 64302
F9 unsigned 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 unsigned 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 unsigned 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