Viessmann Vitotronic SPS Service Instructions Manual page 35

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System controller configuration

Fig. 24

Buttons and parameters:

■

"Communication interface"

Choosing the Modbus transfer type

–

Note

"Modbus TCP" is the best option and should

therefore always be used in the absence of other

requirements.

"Modbus TCP"

Data is sent with confirmation of receipt.

–

"Modbus UDP"

Data is sent without confirmation of receipt.

"Modbus RS485"

–

Data is transmitted using the RS485 industry

standard.

–

"Modbus inactv"

Modbus interface deactivated.

"RS485 communication setting"

■

Select "RS485 Baud rate" and "RS485 parity bit".

(cont.)

"Modbus Unit Identifier (UID)"

■

Number of Modbus unit

■

"Save and go back"

Save settings and go back one page

"Back"

■

One page back

Configuring the system

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