42 MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
RS485 INTERFACE (MODBUS RTU) CHAPTER 1: COMMUNICATIONS GUIDE
13 M
14 N
15 O
16 P
17 Q
18 R
19 S
20 T
21 U
22 V
23 W
24 X
25 Y
26 Z
F17 32 bits UNSIGNED LONG VALUE, 3 DECIMAL PLACES
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
F18 32 bits DATE MM/DD/YYYY
1st byte Month 1 to 12
2nd byte Day 1 to 31
3rd and 4th byte Year 2000 to 2099
Example: Feb 20, 1995 stored as 34867142
i.e. 1st word: 0214, 2nd word 07C6
F19 32 bits TIME HH:MM:SS:hh
1st byte Hours 0 to 23
2nd byte Minutes 0 to 59
3rd byte Seconds 0 to 59
4th byte Hundredths of seconds 0 to 99
Example: 2:05pm stored as 235208704
i.e. 1st word: 0E05, 2nd word 0000
F20 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
Note: -1 means “Never”
F21 16 bits 2’s COMPLEMENT SIGNED VALUE, 2 DECIMAL PLACES
POWER FACTOR
< 0 Leading Power Factor - Negative
> 0 Lagging Power Factor - Positive
Example: Power Factor of 0.87 lag is used as 87
i.e. 0057
F22 16 bits TWO 8-BIT CHARACTERS PACKED INTO 16-BIT
UNSIGNED
MSB First Character
LSB Second Character
Example: String ‘AB’ stored as 4142 hex
Code Type Definition
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