GE 845 Instruction Manual page 162

DEVICE
Administrator Login and Commands via Modbus for 8 Series Relays
4–34
MASTER TRANSMISSION
DATA STARTING ADDRESS
NUMBER OF SETPOINTS
CRC (low, high)
Table 4-6: Slave Packet Format for Function Code 03H
SLAVE RESPONSE
SLAVE ADDRESS
FUNCTION CODE
BYTE COUNT
DATA 1
DATA 2
DATA 3
DATA 4
CRC (low, high)
ASE 2000 V2 Example
--> 00 00 00 00 00 06 FE 03 4A 8A 00 04
--> 00 00 00 00 00 0B FE 03 08 00 00 04 B0 00 00 00 64
Logging in as Administrator
Logging in as Administrator is demonstrated in the example below. The process requires
writing 44 bytes which consist of the Role ID and Password. Password characters are 22
bytes and role characters are also 22 bytes. The logging in must be done using a single
Modbus command using Function 10H (Store Multiple Setpoints).
The following table shows data to be written to the relay to login as Administrator. The
relay password in this example is 0.
Table 4-7: Data Written to Relay to Login as Administrator
Description
Role Characters 1 and 2
Role Characters 3 and 4
Role Characters 5 and 6
Role Characters 7 and 8
Role Characters 9 and 10
Role Characters 11 and 12
Role Characters 13 and 14
Role Characters 15 and 16
Role Characters 17 and 18
Role Characters 19 and 20
Role Characters 21 and 22
Password Characters 1 and 2
Password Characters 3 and 4
Password Characters 5 and 6
Password Characters 7 and 8
Password Characters 9 and 10
BYTES EXAMPLE
2 4A 8A
2 00 04
2 67 F4
BYTES EXAMPLE
1 FE
1 03
1 08
2 00 00
2 04 B0
2 00 00
2 00 64
2 E7 75
Memory Map Address
DEC HEX
62242 F322
62243 F323
62244 F324
62245 F325
62246 F326
62247 F327
62248 F328
62249 F329
62250 F32A
62251 F32B
62252 F32C
62253 F32D
62254 F32E
62255 F32F
62256 F330
62257 F331
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
DESCRIPTION
data starting at 4A8A
4 registers = 8 bytes total
CRC error code
DESCRIPTION
message from slave 254
read registers
4 registers = 8 bytes total
value in address 4A8A (16-bit)
value in address 4A8B (16-bit)
value in address 4A8C (32-bit)
CRC error code
Value to be written
DEC HEX
16740 4164
28009 6D69
28265 6E69
29556 7374
29281 7261
29807 746F
29184 7200
0 0000
0 0000
0 0000
0 0000
12288 3000
0 0000
0 0000
0 0000
0 0000