9-28 | MVW3000
9
Communication Networks
9-28 | MVW3000
The
Item 9.2.1 Protocol Definitions on page 9-15
defines the parameter and variable resolutions when transmitted
via serial. Available functions and response times:
In the Modbus-RTU protocol specification it is defined the functions used to access the type of registers described
in the specification. In the MVW3000, parameters and basic variables were defined as being holding type registers
(referenced as 4x). Besides these registers, it is also possible to access directly internal command and monitoring
bits (referenced as 0x). To access these bits and registers, the next services (or functions) for the MVW3000
frequency inverters were made available:
Read Coils
Description: reading of internal bit blocks or coils.
Function code: 01.
Broadcast: not supported.
Response time: 5 to 10 ms.
Read Holding Registers
Description: reading of register blocks of the holding type.
Function code: 03.
Broadcast: not supported.
Response time: 5 to 10 ms.
Write Single Coil
Description: writing in a single internal bit or coil.
Function code: 05.
Broadcast: supported.
Response time: 5 to 10 ms.
Write Single Register
Description: writing in a single register of the holding type.
Function code: 06.
Broadcast: supported.
Response time: 5 to 10 ms.
Write Multiple Coils
Description: writing in internal bit blocks or coils.
Function code: 15.
Broadcast: supported.
Response time: 5 to 10 ms.
Write Multiple Registers
Description: writing in register blocks of holding type.
Function code: 16.
Broadcast: supported.
Response time: 10 to 20 ms for each written register.
Read Device Identification
Read Device Identification.
Function code: 43.
Broadcast: not supported.
Response time: 5 to 10 ms.
Note:
Modbus-RTU network slaves are addressed from 1 to 247. The master uses the address 0 to send
messages that are destined to all slaves (broadcast).
Data Addressing and Offset:
The data addressing in the MVW3000 is done with offset equal to zero, meaning that the number of the address is
equal to the given number. The parameters are made available starting from the address 0 (zero), while the basic
variables are made available starting from the address 5000. In the same way, the status bits are made available
starting from the address 0 (zero) and the command bytes are made available beginning from the address 100.
Summary of Contents for MVW3000 A0040 V023
Page 2: ......
Page 4: ......
Page 5: ...User s Manual Series MVW3000 Language English Document 10004823674 00 Publication Date 03 2017...
Page 6: ...Summary of Reviews Version Review Description R00 First edition...
Page 12: ...1 4 MVW3000 1 Safety Notices...
Page 58: ...6 18 MVW3000 6 Installation Connection and Energization...