GE MM300 Manual page 49

CHAPTER 2: RS485 INTERFACE (MODBUS RTU)
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
Code Type
i.e. 1st word: 0001 hex, 2nd word: E240 hex
F18 32 bits
1st byte
2nd byte
3rd and 4th byte
Example: Feb 20, 1995 stored as 34867142
i.e. 1st word: 0214, 2nd word 07CB
F19 32 bits
1st byte
2nd byte
3rd byte
4th byte
Example: 2:05pm stored as 235208704
i.e. 1st word: 0E05, 2nd word 0000
F20 32 bits
1st 16 bits
2nd 16 bits
Note: -1 means "Never"
F21 16 bits
< 0
> 0
Example: Power Factor of 0.87 lag is used as 87
i.e. 0057
F22 16 bits
MSB
LSB
Example: String 'AB' stored as 4142 hex
F25 16 bits
0
1
F26 16 bits
0
1
2
3
4
5
6
7
8
9
10
11
F74 16 bits
0
Definition
DATE MM/DD/YYYY
Month 1 to 12
Day 1 to 31
Year 2000 to 2099
TIME HH:MM:SS:hh
Hundredths of seconds 0 to 99
Seconds 0 to 59
Minutes 0 to 59
Hours 0 to 23
2's COMPLEMENT SIGNED LONG VALUE
High Order Word of Long Value
Low Order Word of Long Value
2's COMPLEMENT SIGNED VALUE, 2 DECIMAL PLACES
POWER FACTOR
Leading Power Factor - Negative
Lagging Power Factor - Positive
TWO 8-BIT CHARACTERS PACKED INTO 16-BIT
UNSIGNED
First Character
Second Character
TRACE MEMORY CHANNEL DATA
Leading
Lagging
TRACE MEMORY CHANNEL DATA
Va
Vb
Vc
Va2
Vb2
Vc2
Ia
Ib
Ic
Ig
Inputs 1 to 16
Outputs 1 to 16
DATA LOGGER SAMPLE RATE
1 cycle
FORMAT CODES
2–41