CPS ECB200KTL/US-800 - Modbus Function; Modbus RTU

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6.4 Modbus function

The Modbus function supports two interfaces, one is Modbus RTU that supports

RS485 interface, and the other is Modbus TCP that supports network interface. For

specific register settings, see "200kW PCS Protocol" external communication

document.

6.4.1 Modbus RTU

Address: 1 (default)

Baud Rate: 9600(default)

Data Bits: 8

Parity: None

Stop Bit: 1

DTR: Disable

RTS: Disable

Modbus RTU Frame Format:

start

Address

Function

Code

Data

CRC16

end

T1-T2-T3-T4

1Byte

2Byte

T1-T2-T3-T4

Examples for writing to single register

1. To modify “Active power set in per” to 50%, the following instruction can be

issued:

01 06 30 47 01 F4 36 C8

2. To modify “Active power set in per” to -100%, the following instruction can be

issued:

01 06 30 47 FF 9C 77 46

3. To modify “Reactive power set in per” to 10%, the following instruction can be

issued:

01 06 30 4C 00 64 46 F6