GE 735

4-10 735/737 Feeder Protection Relay
GE Power Management
4.3 MEMORY MAP 4 MODBUS COMMUNICATIONS
4
4.3 MEMORY MAP 4.3.1 MODBUS MEMORY MAP
The data stored in the 735/737 is grouped as actual values and setpoints. Setpoints can be read and written by a master
computer. Actual values can only be read. All setpoints and actual values are stored as two byte values. That is, each
address listed in the memory map is the address of a two byte value. Addresses are listed in hexadecimal. Data values
(setpoint ranges, increments, etc.) are listed in decimal. Consult the units, step and range as well as format tables following
the memory map for interpretation of register values.
Table 4–1: 735/737 MODBUS MEMORY MAP (Sheet 1 of 2)
GROUP ADDR DESCRIPTION RANGE STEP UNITS FOR-
MAT
FACTORY
DEFAULT
PRODUCT ID 0000 GE product device code 25, 26 --- --- F1 25=735,26=737
0001 GE product hardware revision code 1 to 26 --- --- F1 4=D
0002 GE product firmware revision code 1 to 255 --- --- F3 01, 00 = 1.0
0003 GE product modification file number 0 to 1000 --- --- F1 0 = no mod
0004 Reserved --- --- --- --- ---
↓↓ ↓ ↓ ↓↓ ↓
000F Reserved --- --- --- --- ---
MONITORED
DATA
0010 Phase A current 0 to 2000 1 % CT F1 ---
0011 Phase B current 0 to 2000 1 % CT F1 ---
0012 Phase C current 0 to 2000 1 % CT F1 ---
0013 Ground current 0 to 2000 1 % CT F1 ---
0014 Relay Status Register --- 1 --- F101 ---
0015 Output relays --- --- --- F103 ---
0016 Not used --- --- --- --- ---
0017 LEDs --- --- --- F105 ---
0018 Bargraph --- --- --- F106 ---
0019 Not used --- --- --- --- ---
↓↓ ↓ ↓ ↓↓ ↓
001F Not used --- --- --- --- ---
PRE-TRIP
DATA
0020 Phase A pre-trip current 0 to 2000 1 % CT F1 ---
0021 Phase B pre-trip current 0 - 2000 1 % CT F1 ---
0022 Phase C pre-trip current 0 to 2000 1 % CT F1 ---
0023 Ground pre-trip current 0 to 2000 1 % CT F1 ---
0024 Cause of last trip Bits --- --- F113 ---
0025 Last OC trip time 0 to 65000 1 ms F115 ---
0026 Cause of second last trip Bits --- --- F113 ---
0027 Cause of third last trip Bits --- --- F113 ---
0028 Cause of fourth last trip Bits --- --- F113 ---
0029 Cause of fifth last trip Bits --- --- F113 ---