Set Values For The Circulation Pumps; Communication; Modbus Data Transfer - Viessmann PLC VITOCAL 350-HT PRO Service Instructions For Contractors

Configuring the system
Adjusting set values

Set values for the circulation pumps

Launch with
■ "Menu"
■ "Set val."
■ "CP"
Fig. 21
The following settings can be changed:
"Adv.runtime, circ.pumps"
■
Waiting time between activation of the circulation
pumps and enabling of the compressors
■ "Run-on time, circ. pumps"
Waiting time between deactivation of the compres-
sors and deactivation of the circulation pumps

Communication

Modbus data transfer

The Modbus RTU interface is wired to an RJ45 adap-
tor (700XD1).
The RJ45 adaptor is located in the upper wiring cham-
ber next to the terminal strip for external components.
Vitocal 350-HT Pro installation and service
instructions
28
(cont.)
Terminal Assignment
1 N/A
2 /RX/TX input
3 RX/TX input
4 GND