Table 27-3. Modbus RTU Format Table
Format Description Values Permitted and Examples
F1 Integer 2 Bytes From 0 at 65535
F2 Integer 2 Bytes
Decimal point (/1000)
From 0 at 6553.5
i.e. 1000 to be read as 1.0
F3 Integer 2 Bytes (Encoded) 2 for 2 terminal
3 for 3 terminal
F4 Integer 2 Bytes (Encoded) 1 for 1 Amp.
5 for 5 Amp.
F5 Integer 2 Bytes 50 for 50HZ
60 for 60HZ
F6 Integer Bytes
Decimal point (/100)
0 at 655.35
i.e. 100 to be read as 1.00
F7 Integer Bytes
Decimal point (/10)
0 at 6553.5
i.e. 10 to be read as 1.0
F8 Integer Bytes
Decimal point (/10000)
0 at 6.5535
i.e. 10000 to be read as 1.0
F10 Event in ms From 01/01/1970 i.e.
Dir Value
060EH 1 (data TRUE)
060FH 10123
0610H 48318
0611H 98
NUMBER IS 984831810123 ms From 01/01/1970,
this event time is 17/03/2001 12:23:30.123
F16 Alarm Code
2 Byte integer
i.e. 34= SV Parallel Port
00= no alarm
F17 Code Trip Release +100=1
+0=0
+CS=67 67=C Ascii
F20 Integer Bytes ASCII
F22 2 Byte Integer Trip Codes as Follows:
0 - A phase Trip 1 – B phase trip
2 - C phase Trip 3 – 3I0 phase trip
4 - A &B Trip 5 – A & C trip
6 - A & 3I0 Trip 7 – B & C trip
8 - B & 3I0 Trip 9 – C & 3I0 trip
10 - A&B&3I0 Trip 11 – B&C&3I0 trip
12 - A&C&3I0 Trip 13 – ABC&3I0 trip
14 - A&B&C Trip
16 - DTT Received 17 – DTT Transmitted
RFL 9300 RFL Electronics Inc.
October 20, 2004 27 - 9 (973) 334-3100
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