Daikin EWAP460MBYN [267/452] Bms function

ESIE05-07 Functional Control for a Standalone Unit

Part 2 – Functional Description 2–71

2.26 BMS Function

Introduction BMS stands for Building Management Systems. These systems were developed for centralized

overview and control of technical installation for complete sites.

The Daikin BMS option makes it possible to connect the Daikin chillers to a larger control system. The

necessary tools for this communication are the Gateway and the address card.

In this chapter we will give a short overview of the possibilities and settings for the BMS function.

For more detailed information we refer to the service manual "BMS option for Daikin water chillers"

Function

description

In the service menu it is possible to set the parameter "BMS control allowed". If this parameter is "YES"

then the supervisor can read and write parameters from and to the unit. If however the parameter is

set to "NO" then the supervisor can only read parameters from the unit.

For communication both the address card and the Gateway create a database with the variables.

P From address card to Gateway

P From Gateway to supervisory BMS

The BACnet and Modbus-Jbus protocols do not distinguish integer from analogue variables. Therefore

the integer and analogue variables from the address card will be put together in the analogue variables

in the Gateway database.

Variable type Maximum number

Digital 200

Analogue 128

Integer 128

Variable type Maximum number Corresponding BACnet object

Digital 200 Binary value

Analogue 256 Analogue value

ESIE05-07.book Page 71 Wednesday, October 11, 2006 10:42 AM