Format Codes - GE 345 Communications Manual

MODBUS MEMORY MAP

Format Codes

1–128
Code
F1
Example: 1234 stored as 1234
F1B
Example: 1234 stored as 1234
F1C
Example: 1234 stored as 1234
F2
Example: 123.4 stored as 1234
F2B
Example: 123.4 stored as 1234
F3
Example: 12.34 stored as 1234
F3B
Example: 12.34 stored as 1234
F4
Example: -1234 stored as -1234 i.e. 64302
F4B
Example: -1234 stored as -1234 i.e. 64302
F5
Example: -123.4 stored as -1234 i.e. 64302
F6
Example: -12.34 stored as -1234 i.e. 64302
F7
Example: -1.234 stored as -1234 i.e. 64302
F8
Example: -0.1234 stored as -1234 i.e. 64302
F9
1st 16 bits
2nd 16 bits
Example: 123456 stored as 123456
i.e. 1st word: 0001 hex, 2nd word: E240 hex
F10
1st 16 bits
2nd 16 bits
Example: 12345.6 stored as 123456
i.e. 1st word: 0001 hex, 2nd word: E240 hex
F11
1st 16 bits
2nd 16 bits
CHAPTER 1: COMMUNICATIONS GUIDE
Type Definition
unsigned 16 bits UNSIGNED VALUE
unsigned 16 bits UNSIGNED VALUE, MAX VALUE = OFF
unsigned 16 bits UNSIGNED VALUE, MIN VALUE = OFF
unsigned 16 bits UNSIGNED VALUE, 1 DECIMAL PLACE
unsigned 16 bits UNSIGNED VALUE, 1 DECIMAL PLACE, MAX
VALUE = OFF
unsigned 16 bits UNSIGNED VALUE, 2 DECIMAL PLACES
unsigned 16 bits UNSIGNED VALUE, 2 DECIMAL PLACES, MAX
VALUE = OFF
signed 16 bits 2's COMPLEMENT SIGNED VALUE
signed 16 bits 2's COMPLEMENT SIGNED VALUE, MAX VALUE
= OFF
signed 16 bits 2's COMPLEMENT SIGNED VALUE, 1 DECIMAL
PLACES
signed 16 bits 2's COMPLEMENT SIGNED VALUE, 2 DECIMAL
PLACES
signed 16 bits 2's COMPLEMENT SIGNED VALUE, 3 DECIMAL
PLACES
signed 16 bits 2's COMPLEMENT SIGNED VALUE, 4 DECIMAL
PLACES
unsigned 32 bits UNSIGNED LONG VALUE
High Order Word of Long Value
Low Order Word of Long Value
unsigned 32 bits UNSIGNED LONG VALUE, 1 DECIMAL PLACE
High Order Word of Long Value
Low Order Word of Long Value
unsigned 32 bits UNSIGNED LONG VALUE, 2 DECIMAL PLACES
High Order Word of Long Value
Low Order Word of Long Value
345 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE