Viessmann SCU224 Información técnica descargar pdf (Pagina 12)

KWE P/N 394047 Versatronik 532 Solar/Modbus Gateway V1.0 09/2013 Technical information subject to change without notice

Overview:

Wiring

RS-485 Network

COM1 terminals A and B are used.

The A and B naming convention may differ across

manufacturers.

Refer to individual wiring/installation pages in this

manual.

A=(+) non-inverting

B=(—) inverting

Termination and Bias

 This device does not have a termination

resistor installed

 There are two 4.7kohm pull up/down

resistors located on the lines to maintain

bias.

LED Operation

LED2 will blink every time a Modbus request is

seen on the network

Modbus Information

Modbus Communication

Configuration Settings

The gateway is a Modbus slave and all

communication has to be initiated by a master.

To set up successful communication with the

gateway all connection parameters have to be

set correctly to the following: 9600 8-N-1 RTU.

Mode RTU

Baud Rate 9600bps

Data Bits/Length 8

Parity None

Stop bits 1

Address/Device ID 88, 1-9

Trouble-Shooting

Problem: Not getting a response from the

gateway device

 Ensure the connection is set to 9600 8-N-1

 Check the rotary dial switch for the device

addressing and it not in between dial

settings

 Ensure the communication cables match

their polarity

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 18

Sin comentarios

Viessmann SCU224 Información técnica Pagina 12