Ecl 485 Bus Description; Installation Of The Ecl 485 Network - Danfoss ECL Comfort 210 Instructions Manual

Instructions ECL Comfort 210 / 310, communication description

8. ECL 485 bus description

The ECL 485 bus is used to connect ECL 210, ECL 310 and ECA
30/31 with each other in a master/slave system.
The master/slave communication exchanges information
between the devices, e.g. time and date, outdoor
2
temperature, refill request
The ECL 485 bus wiring must be done similar to a Modbus RS-
485 network, i.e. devices must be connected in a daisy chain
network (polarization is done by the ECL master, address 15).
The recommended network installation procedure is as in
section 8.1.2.
The total cable length of maximum 200 meters (all devices
incl. the internal ECL 485 communication bus) should not be
exceeded. Cable lengths of more than 200 meters may
increase noise sensitivity (EMC).
2 Refill is a functionality for the A231, A331, A361 and A368 applications

8.1 Installation of the ECL 485 network

The ECL 485 bus is similar to Modbus concerning that an
address is to be used only once in the network. Using the
same address multiple times will cause malfunction. It is
recommended that all of the devices are installed sequentially
to ensure that they will not conflict with each other.
Address 15 is reserved for the master controller.
Addresses 1-9 are reserved for slave controllers.
Address 0 is reserved for listening slaves. Listening slaves can
only listen for master broadcasts and cannot broadcast
anything to the master. Blind controllers cannot be used as
listening slaves.
8.1.1 ECL 210B and ECL 310B application installation
The ECA 30/31 can be used for installation of an application in
an ECL controller without display and dial (also called
blind/B/type B/HMI less).
Installation of the application must be done in a point-to-
point connection between the ECL and ECA 30/31.
If necessary, disconnect other ECL or ECA products from the
ECL 485 bus
Connect the ECL 210B / ECL 310B directly to the ECA 30/31
If necessary set the ECA 30/31 slave address to 'A' and the
connection address to 15
The ECA 30/31 will now act as an ECL with display and dial.
Select the application normally
When the application is installed the ECL will be set to ECL
485 master (address 15)
If necessary, adjust the ECL 210B / ECL 310B's ECL 485 address
and connect it to the ECL 485 network again.
2
Refill is a functionality for the A231, A331, A361 and A368 applications
Danfoss District Energy
etc.
Only Danfoss District Energy products developed for the ECL 485
bus can be used.
No third party products can be used!
VI.LG.V3.02
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DEN-SMT/DK