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8.3 MODBUS MEMORY MAP
Table 8–7: 745 DATA FORMATS (Sheet 1 of 35)
FORMAT
APPLICABLE BITS
CODE
F1
16 bits
Example: 1234 stored as 1234
F2
16 bits
Example: 123.4 stored as 1234
F3
16 bits
Example: 12.34 stored as 1234
F4
16 bits
Example: –1234 stored as –1234
F5
16 bits
Example: –123.4 stored as –1234
F6
16 bits
Example: –12.34 stored as –1234
F7
32 bits
1st 16 bits
2nd 16 bits
Example: 123456 stored as 123456
F8
32 bits
1st 16 bits
2nd 16 bits
Example: 12345.6 stored as 123456
F9
32 bits
1st 16 bits
2nd 16 bits
Example: 1234.56 stored as 123456
8
F10
32 bits
1st 16 bits
2nd 16 bits
Example: -123456 stored as -123456
F11
32 bits
1st 16 bits
2nd 16 bits
Example: –12345.6 stored as –123456
8-74
DEFINITION
UNSIGNED VALUE
UNSIGNED VALUE
1 DECIMAL PLACE
UNSIGNED VALUE
2 DECIMAL PLACES
2's COMPLEMENT SIGNED VALUE
2's COMPLEMENT SIGNED VALUE,
1 DECIMAL PLACE
2's COMPLEMENT SIGNED VALUE,
2 DECIMAL PLACES
UNSIGNED LONG VALUE
high order word of long value
low order word of long value
UNSIGNED LONG VALUE,
1 DECIMAL PLACE
high order word of long value
low order word of long value
UNSIGNED LONG VALUE,
2 DECIMAL PLACES
high order word of long value
low order word of long value
2's COMPLEMENT SIGNED LONG
VALUE
high order word of long value
low order word of long value
2's COMPLEMENT SIGNED LONG
VALUE, 1 DECIMAL PLACE
high order word of long value
low order word of long value
745 Transformer Management Relay
8.3.2 MEMORY MAP DATA FORMATS
Table 8–7: 745 DATA FORMATS (Sheet 2 of 35)
FORMAT
APPLICABLE BITS
CODE
F12
32 bits
1st 16 bits
2nd 16 bits
Example: –1234.56 stored as –123456
F13
16 bits
0000 0000 0000 0001 1 = A
0000 0000 0000 0010 2 = B
↓
0000 0000 0001 1010 26 = Z
F14
16 bits
xxxx 1111 xxxx xxxx
xxxx xxxx 1111 xxxx
xxxx xxxx xxxx 1111
Example: Revision 2.83 stored as 0283 hex
F15
16 bits
xxxx xxxx xxxx xxx1
xxxx xxxx xxxx xx1x
xxxx xxxx xxxx x1xx
xxxx xxxx xxxx 1xxx
xxxx xxxx xxx1 xxxx
xxxx xxxx xx1x xxxx
xxxx xxxx x1xx xxxx
xxxx xxxx 1xxx xxxx
xxxx xxx1 xxxx xxxx
xxxx xx1x xxxx xxxx
F16
16 bits
0000 0000 0000 0000 0 = 5 min
0000 0000 0000 0001 1 = 10 min
0000 0000 0000 0010 2 = 15 min
8 COMMUNICATIONS
DEFINITION
2's COMPLEMENT SIGNED LONG
VALUE, 2 DECIMAL PLACES
high order word of long value
low order word of long value
HARDWARE REVISION
↓
SOFTWARE REVISION
Major Revision Number
0 to 9 in steps of 1
Minor Revision Number
0 to 9 in steps of 1
Ultra Minor Revision Number
0 to 9 in steps of 1
INSTALLED OPTIONS
Windings Per Phase (0 = Two
Windings, 1 = Three Windings)
Rating of Winding 1 Phase Current
Inputs (0 = 1 A, 1 = 5 A)
Rating of Winding 2 Phase Current
Inputs (0 = 1 A, 1 = 5 A)
Rating of Winding 3 Phase Current
Inputs (0 = 1 A, 1 = 5 A)
Rating of Winding 1/2 Ground
Current Inputs (0 = 1 A, 1 = 5 A)
Rating of Winding 2/3 Ground
Current Inputs (0 = 1 A, 1 = 5 A)
Control Power (0=LO [20-60 Vdc],
1 = HI [90-300 Vdc/70-265 Vac])
Analog Input/Outputs (0 = Not
Installed, 1 = Installed)
Loss-Of-Life (0 = Not Installed,
1 = Installed)
Restricted Ground Fault (0 = Not
Installed, 1 = Installed)
DEMAND INTERVAL/RESPONSE
GE Power Management
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