TECO 7300CV User Manual

7300CV MODBUS COMMUNICATION PROTOCOL
File No. :PC-CV-08
Version : 1.A
Page :
1/34
7300CV MODBUS
USER’S MANUAL
COMMUNICATION INTERFACE

TECO 7300CV Specifications

General

Protection Class	IP20
Input Voltage	200-240V AC
Output Voltage	0-240 VDC
Storage Temperature	-20-60°C
Humidity	5-95% non-condensing
Operating Temperature	0-40°C

Summary

Communication Data Frame

Hardware Installation

Describes physical connection and network setup for Modbus communication.

Data Format for ASCII Mode

Defines the structure and fields of data frames for Modbus ASCII mode.

Slave Address

Lists address ranges and meanings for slave devices in the Modbus network.

Function Code

Explains the purpose and values of different function codes used in Modbus commands.

CMS (Checksum and Time-out Definition)

LRC Calculation

Details the Longitudinal Redundancy Check (LRC) calculation method for error detection.

CRC Check Calculation

Explains the Cyclic Redundancy Check (CRC) calculation method for error detection.

Time-out and Retry

Defines communication time-out periods and the number of retry attempts.

Command Start Address

Error Code

Command Start Address Description

Inverter Control

Monitor Data (For Reading)

Details the data points that can be monitored from the inverter for reading purposes.

Read Holding Register [03H]

Explains how to read data from specified holding registers using function code 03H.

Loop Back Testing [08H]

Describes the process for performing loop-back testing to verify communication integrity.

Write Holding Register [06H]

Details how to write a single data value to a specified holding register using function code 06H.

Write Several Holding Registers [10H]

Explains how to write data to multiple holding registers simultaneously using function code 10H.

Comparison List: Parameter vs. Register