GE Industrial Solutions MX350 Communications Guide - Manual (Page 49)

COMMUNICATIONS GUIDE RS485 INTERFACE (MODBUS RTU)
MX350 AUTOMATIC TRANSFER CONTROL SYSTEM – COMMUNICATIONS GUIDE 45
18 R
19 S
20 T
21 U
22 V
23 W
24 X
25 Y
26 Z
F16 16 bits 2’s COMPLEMENT SIGNED VALUE, 1 DECIMAL PLACE
<0 S2 Leads S1
>0 S1 Leads S2
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 1995 to 2094
Example: Feb 20, 1995 stored as 34867147
i.e. 1st word: 0214, 2nd word 07CB
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
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
F24
16 bits UNSIGNED VALUE AS SECONDS SHOW AS Duration,
MAX VALUE = OFF
Example: 1234 stored as 1234, and displayed as 20 Mins
F25
16 bits Trace Memory Channel Data
0 Leading
1 Lagging
Code Type Definition