Several Controllers In The Same System - Danfoss ECL Comfort 310 Operating Manual

Operating Guide

8.2 Several controllers in the same system

When ECL Comfort controllers are interconnected by means of
the ECL 485 communication bus (cable type: 2 x twisted pair), the
master controller will broadcast the following signals to the slave
controllers:
• Outdoor temperature (measured by S1)
• Time and date
• DHW tank heating / charging activity
Furthermore, the master controller can receive information about:
• the desired flow temperature (demand) from slave controllers
• and (as from ECL controller version 1.48) DHW tank heating /
charging activity in slave controllers
Situation 1:
SLAVE controllers: How to make use of the outdoor
temperature signal sent from the MASTER controller
The slave controllers only receive information about outdoor
temperature and date / time.
SLAVE controllers:
Change the factory set address from 15 to address 0.
• In , go to System > Communication > ECL 485 addr:
ECL 485 addr. (master / slave address)
Circuit
116 DEN-SMT/DK
ECL Comfort 310, application P318
2048
Setting range Choose
0 ... 15
In a system with MASTER / SLAVE controllers, only one MASTER
controller with address 15 is allowed.
If by mistake more MASTER controllers are present in an ECL 485
communication bus system, decide which controller is to be MASTER.
Change the address in the remaining controllers. However, the system
will operate but not be stable with more than one MASTER controller.
In the MASTER controller, the address in 'ECL 485 addr. (master / slave
address)' , ID no. 2048, must always be 15.
'Demand offset' with a value is to be used in the Master controller only.
0
VI.JM.Q3.02
Danfoss District Energy