Baldor VS1MXS51, Инструкция по установке и эксплуатации

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E-2 RS485/MODBUS Protocol MN762S
E.4 Performance Specifications
Table E-2 Communication Performance
Communication Method RS485 Hardware specification, MODBUS protocol
Transmission Form Bus method, Multi drop Master/Slave architecture
Applicable inverter VS1MXS series
Connectable drives Max 31
Transmission distance
Max. 2,300 ft (Repeater may be required for high noise
environments.)
E.5 Hardware Specifications
Table E-3 Communication Hardware
Installation Use RJ11 connector on control (see chapter 5)
Power Supply Provided by isolated power from the inverter power supply
E.6 Communication Specifications
Table E-4 Communication Specifications
Communication Speed 1155200 bbs (default), 57600, 38400, 19200, 9600
Error Check CRC
Data Format 1 start bit, 8 data bits, 1 stop bits, no parity
Physical Signal RS 485 (2 wire)
User Interface RJ11
Protocol Modbus RTU
E.7 Communications Protocol (MODBUS-RTU)
The VS1MXS supports Master / Follower Modbus RTU communications, using the 03 Read Holding
Registers and 06 Write Single Holding Register commands. Many Master devices treat the first
Register address as Register 0, therefore it may be necessary to convert the Register Numbers detail
in section 0 by subtracting 1 to obtain the correct Register address. The telegram structure is as
follows:
Table E-5 Command 03 – Read Holding Registers
Master Telegram Length Follower Response Length
Follower Address 1 Byte Follower Address 1 Byte
Function Code (03) 1 Byte Starting Address 1 Byte
1st Register Address 2 Byte 1st Register Value 2 Bytes
No. Of Registers 2 Byte 2nd Register Value 2 Bytes
CRC Checksum 2 Byte Etc. 2 Bytes
CRC Checksum 2 Bytes