GE 345 Communications Manual

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

GE 345 Specifications

General

Brand	GE
Model	345
Category	Relays
Language	English