Ge 489 User Manual download pdf (Page 196)

6-34 489 Generator Management Relay GE Multilin

6.3 MODBUS MEMORY MAP 6 COMMUNICATIONS

6.3.8 MEMORY MAP DATA FORMATS

Table 6–2: DATA FORMATS (SHEET 1 OF 5)

FORMAT

CODE

TYPE DEFINITION

F1 16 bits Unsigned Value

Example: 1234 stored as 1234

F2 16 bits Unsigned Value, 1 Decimal Place

Example: 123.4 stored as 1234

F3 16 bits Unsigned Value, 2 Decimal Places

Example: 12.34 stored as 1234

F4 16 bits 2’s Complement Signed Value

Example, –1234 stored as –1234 (i.e., 64302)

F5 16 bits 2’s Complement Signed Value, 1 Decimal Place

Example, –1.234 stored as –1234 (i.e., 64302)

F6 16 bits 2’s Complement Signed Value, 2 Decimal Places

Example, –12.34 stored as –1234 (i.e., 64302)

F10 32 bits 2’s Complement Signed Long Value, 1 Decimal Place

1st 16 bits: High order word of long value

2nd 16 bits: Low order word of long value

Example: –12345.6 stored as –123456 (i.e., 1st word FFFE hex, 2nd word 1DC0 hex)

F12 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

Example: –123456 stored as 1st word FFFE hex, 2nd word 1DC0 hex

F13 32 bits 2’s Compliment Signed Long Value, 3 Decimal Places

1st 16 bits: High order word of long value

2nd 16 bits: Low order word of long value

Example: –123.456 stored as -123456 (i.e., 1st word FFFE hex, 2nd word 1DC0 hex)

F14 32 bits 2’s Complement Signed Long Value, 2 Decimal Places

1st 16 bits: High order word of long value

2nd 16 bits: Low order word of long value

Example: –1234.56 stored as –123456 (i.e., 1st word FFFE hex, 2nd word 1DC0 hex)

F15 16 bits Hardware Revision

1 = revision A, 2 = revision B, 3 = revision C,..., 26 = revision Z

F16 16 bits Software Revision

1111 1111 XXXX XXXX: Major revision number – 0 to 9 in steps of 1

XXXX XXXX 1111 1111: Minor revision number (two BCD digits) 00 to 99 in steps of 1

Example: Revision 2.30 stored as 0230 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 (1996 to 2094)

Example: Feb. 20, 1996 stored as 34867148 (i.e., first word 0214, 2nd word 07CC)

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)

F22 16 bits Character String (Note: Range indicates number of characters)

1st byte (MSB) of each word: First of a pair of characters

2nd byte (LSB) of each word: Second of a pair of characters

Example: String “AB” stored as 4142 hex

F24 32 bits Time Format for Broadcast

1st byte: Hours (0 to 23)

2nd byte: Minutes (0 to 59)

3rd and 4th bytes: Milliseconds (0 to 59999). Note: Clock resolution limited to 1/100 sec.

Example: 1:15:48:572 stored as 17808828 (i.e., 1st word 010F, 2nd word BDBC)

F50 16 bits Relay List (Bitmap)

Bit 0 = Relay 1, Bit 1 =Relay 2, Bit 2 = Relay 3, Bit 3 = Relay 4, Bit 4 = Relay 5, Bit 5 = Relay 6

F100 Unsigned

16 bit integer

Temperature display units

0 = Celsius, 1 = Fahrenheit

F101 Unsigned

16 bit integer

RS485 baud rate

0 = 300, 1 = 1200, 2 = 2400, 3 = 4800, 4 = 9600, 5 = 19200

F102 Unsigned

16 bit integer

RS485 parity

0 = None, 1 = Odd, 2 = Even

F103 Unsigned

16 bit integer

No / Yes selection

0 = No, 1 = Yes

F104 Unsigned

16 bit integer

Ground CT type

0 = None, 1 = 1 A Secondary, 2 = 50:0.025 Ground CT, 3 = 5 A Secondary

F105 Unsigned

16 bit integer

Off / On selection

0 = Off, 1 = On

F106 Unsigned

16 bit integer

VT connection type

0 = None, 1 = Open Delta, 2 = Wye

1 2 ... 191 192 193 194 195 196 197 198 199 200 201 ... 258 259

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