V&T E5 Series, User Manual

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E5 Series High Performance Universal Inverter User’s Manual
136 Appendix A Modbus Communication Protocol

Function 0xT7 read and write multiple parameters
PDU Part Contents Data Length (Byte) Range
Request (Response):
Function code
T 0xT7
The start address of reading register T 0x0000~0xFFFF
The number of reading register T 0x0T~ 0xT0
The start address of writing register T 0x0000~0xFFFF
The number of writing register T 0x0T~0xT0
The number of writing register bytes T T*Number of registers
The writing register contents T*Number of registers
Response:
Function code
T 0xT7
Read the number of register bytes T 0x0T~0xT0
Read data contents T*Read bytes 0x0000~0xFFFF
Operating sequence: Read firstly and rewrite secondly, but the register 0xF080 is an exception, which
shall be written firstly and read secondly so as to facilitate the management of the operation panel.

Note:
 In case continuous storage is required, will store from the lower address to upper address, with
maximum of T6 parameters being stored in one command.
 If change parameter frequently, such as change setting frequency repeat, the parameter PC.03 should
be set to 303, so the communication change in RAM or use 0x4T(0x4T) command replace 0x06
(T0) to not stored the value into EEPROM, prevent from damage inner EEPROM.
 The life of EEPROM is about T00000 times, if change parameters frequently, EEPROM service life will
be reduced quickly.
5. Parameters Address Definition
Appendix Table−1
Address range Meaning
0x0000~0xTA00
All the parameters with an address, and the parameter values can be read and written through
series communication (the write function according to the parameter property define in Chapter
5). The address express with hexadecimal
High-order bytes: Parameter group number
Low-order bytes: Index in group, convert to hexadecimal
Group
number P0 ...
PE d0 dT dT H0 HT HT A0 C0 U0 UT
High-order
bytes 0x
00 0x
0e 0x
0f
0x
T0 0x
TT 0x
TT 0x
T3 0x
T4 0x
T5 0x
T6 0x
T7 0x
T8
For example, the Modbus address of Pb.T3 is : (0x0b<<8)+T3=0x0bT7
0x4000~0x5A00
The parameter address with an attribute word address. The attribute word address:
High-order bytes: Parameter group 0x40
Low-order bytes: Index in group, convert to hexadecimal
For example, the attribute word address of Pb.T3 is : ((0x0b+0x40)<<8)+T3=0x4bT7
The attribute words are defined in the following order: Bit0 ~ BitT are unit, Bit3 ~ Bit4 are
modifying attribute, Bit5 ~ Bit6 are precision and Bit7 ~ BitT5 are reserved
0x8000~0x800D Control word register
0x8T0B~0x8T9F Status word register
0xF000~0xF00T Special register for input password authentication.
0xF080~0xF084 Read the current value, upper limit, lower limit and factory setting of parameter.