Memory Map Organization - GE 750 Instruction Manual

16 COMMUNICATIONS
Table 16–13: REGISTER ADDRESSES FOR USER MAP
DATA REGISTER
DESCRIPTION
General Status
Active Condition
Phase A RMS Current
Phase B RMS Current
Phase C RMS Current
Phase CT Primary
The 750/760 Memory Map describes all the data registers that can be accessed via serial communications.
The Memory Map address range is grouped into several categories as outlined in the following table. All mem-
ory map locations are two byte (16 bit) values. The remaining pages of this chapter list all locations of the
Memory Map. Addresses for all locations are shown in hexadecimal. Consult the range, step, units, and the
data format (listed after the memory map) to interpret register values.
Many Modbus communications drivers add 40001d to the actual adresss of the register
addresses. For example, if address 0h was to be read, then 40001d would be the address
required by the Modbus communications driver; similarly, if address 320h (800d) was to be
NOTE
read, then 40801d would be the address required by the Modbus communications driver.
Table 16–14: MEMORY MAP ORGANIZATION
MEMORY MAP
SECTION
Product ID
Commands
User Map
Actual Values
Setpoints
Event Recorder, Trace
Memory, Data Log
Reserved
Factory Service Data
GE Power Management
Courtesy of NationalSwitchgear.com
VALUES TO STORE IN USER
MAP ADDRESSES
Store 0200h @ 0180h
Store 0210h @ 0181h
Store 0300h @ 0182h
Store 0301h @ 0183h
Store 0302h @ 0184h
Store 1100h @ 0185h
ADDRESS DESCRIPTION
RANGE (HEX)
0000 to 007F Identification and revision information.
0080 to 00FF Substitute command locations. Read and write access.
0100 to 01FF User Map Values and Addresses. See 16.3.15: ACCESSING
DATA VIA THE USER MAP on page 16–16 for details.
0200 to 0FFF Actual values data. Read Only.
1000 to 1FFF Setpoints data. Read and Write.
2000 to 2FFF See Sections 16.3.12: READING THE EVENT RECORDER,
16.3.13: READING TRACE MEMORY, and 16.3.14:
READING THE DATA LOGGER on pages 16–13 to 16–16.
3000 to 3FFF Reserved for future use.
4000 to FFFF Reserved.
750/760 Feeder Management Relay
16.3 MODBUS PROTOCOL
LOCATIONS IN USER MAP
VALUES TO READ DATA
0100h
0101h
0102h
0103h
0104h
0105h

16.3.16 MEMORY MAP ORGANIZATION

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