Inovance MD500T75G - Page 232

8. Interfaces and Communication MD500 User Manual
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Read and Written Parameters
Function parameters can be read and written (except the ones that cannot be changed because they are only for the factory use
or for monitoring).
The parameter group No. and parameter identifying No. are used to express the parameter address.
ƕ High-order bytes: F0 to FF (groups F), A0 to AF (groups A), 70 to 7F (group U)
ƕ Low-order bytes: 00 to FF
For example, to read parameter F3-12, the communication address of F3-12 is expressed as 0xF30C.
Note
ƕ Group FF: They are factory parameters. The parameters cannot be read or changed.
ƕ Group U: These parameters can only be read.
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the AC drive. In addition, pay attention to the setting range, unit and description of parameters when modifying them.
Parameter Group Visited Address
Parameter Address in RAM
F0 to FE 0xF000 to 0xFEFF
0x0000 to 0x0EFF
A0 to AC 0xA000 to 0xACFF 0x4000 to 0x4CFF
U0 0x7000 to 0x70FF -
Frequent storage to the EEPROM reduces its service life. Therefore, in the communication mode, users can change the values of
certain function code parameters in the RAM rather than storing the setting.
ƕ For groups F parameters, users only need to change high order F of the function code address to 0.
ƕ For groups A parameters, users only need to change high order A of the function code address to 4.
The function code addresses are expressed as follows:
ƕ High-order bytes: 00 to 0F (groups F), 40 to 4F (groups A)
ƕ Low-order bytes: 00 to FF
For example, if function code F3-12 is not stored into EEPROM, the address is expressed as 030C; if function code A0-05 is not
stored into EEPROM, the address is expressed as 4005.
It is an invalid address when being read.
Users can also use the command code 07H to implement this function.
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