Installation, MODBUS-RTU Communication | Cleveland Range inverter

Chapter 5 - MODBUS-RTU Communication

Items	Specifications
Control procedure	Asynchronous communication system
Communication system	Half duplex system
Character system	ASCII (8 bit)
Stop bit length	Modbus-RTU: 1 bit, CMC BUS: 2 bit
Sum check	2 byte
Parity check	None

5.3 Installation

5.3.1Connecting the communication line

-First connect the 485 GND of MODBUS-RTU communication line to the inverter’s (CM) terminals of the control terminals.

-Then connect the MODBUS-RTU communication line to the inverter’s (S+), (S-) terminals of the control terminals.

-Check the connection and turn ON the inverter.

-If the communication line is connected correctly set the communication related parameters as the following:

-Operate with DriveView if DriveView is operating, if not operate with the Keypad.

DRV-03 [Drive mode] : 3(RS485)

DRV-04 [Freq. mode] : 5(RS485)

I/O-46 [Inv. Number] :1~31 (If more than 1 inverters are connected, be sure to use different numbers for each inverter)

I/O-47 [Baud-rate] : 9,600 bps (Factory default)

I/O-48 [Lost Mode] : 0 - No action (Factory default)

I/O-49 [Time-Out] : 10 – 1.0sec (Factory default)

I/O-50 [Comm.Prot] : 7 - Modbus-RTU, 0 – CMC BUS

5.3.2System configuration

INV.#1

INV.#2

INV.#n

JP1 switch on the

RS232/485

right upper side of

Converter

control terminal

Comm.

block should be

Terminal

shorted using jumper

Thinkpad

to connect a

terminating resistor

at the end inverter

connected.

-The number of drives to be connected is up to 31 drives.

-The specification of length of communication line is max. 1200m. To ensure stable communication, limit the length below 700m.

-Use shielded wire for all control signal wiring.

inverter specifications

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Cleveland Range inverter manual Installation, MODBUS-RTU Communication, Items Specifications

Models: inverter