Using The User Definable Memory Map - GE MOTOR MANAGER 2 Instruction Manual

6.4 APPLICATIONS
The MM2 contains a User Definable area in the memory map. This area allows re-mapping of the
addresses of any Actual Values or Setpoints registers. The User Definable area has two sections:
1. A Register Index area (memory map addresses 1280H-12F7H) that contains 120 Actual Values
or Setpoints register addresses.
2. A Register area (memory map addresses 0100H-0177H) that contains the data at the addresses
in the Register Index.
Register data that is separated in the rest of the memory map may be re-mapped to adjacent register
addresses in the User Definable Registers area. This is accomplished by writing to register
addresses in the User Definable Register Index area. This allows for improved throughput of data
and can eliminate the need for multiple read command sequences. The User Definable Register
Index is stored as a setpoint and therefore it is "remembered" even when the power is removed.
For example, if the values of Phase A Current (register address 0031H) and DRIVE STATUS (regis-
ter address 0023H) are required to be read from a MM2, their addresses may be re-mapped as fol-
lows:
1. Write 0031H to address 1280H (User Definable Register Index 0000) using function code 06 or
16.
2. Write 0023H to address 1281H (User Definable Register Index 0001) using function code 06 or
16.
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The MM2PC software can be used to write these locations to the User Definable Register Index.
1. Select the Communication > Troubleshooting menu item.
2. At the bottom of the screen, under the title "User Memory Map Insertion (write)", enter "1280" in
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the first index address box.
3. In the values box put the address of the data you want to read, i.e. 0x0031 (Type 0x to indicate a
hex address).
4. Press Send.
5. Press OK.
6. Repeat the above steps for the other data registers you want to read, changing the index address
each time.
It is now possible to read these two data registers with one read, at addresses 0100H, 0101H.
Address 0100H will contain Phase A Current. Address 0x0101 will contain DRIVE STATUS.
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6.4.3 USING THE USER DEFINABLE MEMORY MAP

MM2 Motor Manager 2
6 COMMUNICATIONS
GE Power Management