Daikin EKMBDXB7V1 Handleiding

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Design guide

Modbus Interface DIII

EKMBDXB7V1

 
4P642495-1– 2020.10    Page 1 of 52 
 
Design guide Modbus Interface DIII 
EKMBDXB7V1 
Table of Contents 
Safety Precautions .............................................................................................................................................. 3 
Introduction .................................................................................................................................................... 3 
1 System layout ........................................................................................................................................... 3 
2 Limitations ................................................................................................................................................ 4 
3 Specifications ............................................................................................................................................ 4 
3.1 Dimensions and field wiring .............................................................................................................. 5 
3.2 Wiring diagram .................................................................................................................................. 6 
3.3 LED meaning ...................................................................................................................................... 6 
3.4 Termination resistance (SS switches) ................................................................................................ 6 
3.5 Push buttons ...................................................................................................................................... 7 
3.6 Dipswitch meaning ............................................................................................................................ 7 
4 Overview of compatible Daikin units ranges with DIII connection ........................................................... 8 
5 Overview of compatibilty with other DIII centralised control equipment................................................ 8 
Modbus communication ............................................................................................................................... 10 
1 Modbus Interface DIII settings................................................................................................................ 10 
2 Communication format .......................................................................................................................... 11 
2.1 Function format ............................................................................................................................... 11 
2.2 Character format ............................................................................................................................. 14 
2.3 Silent internal time .......................................................................................................................... 14 
2.5 Response time ................................................................................................................................. 14 
3 Communication procedure ..................................................................................................................... 15 
3.1 System initialisation ......................................................................................................................... 15 
3.2 Monitor and operate units from the BMS ....................................................................................... 16 
3.3 Other DIII devices exist in the same system .................................................................................... 20 
Modbus registers .......................................................................................................................................... 21 
1. Input registers ........................................................................................................................................ 21 
2 Holding registers ..................................................................................................................................... 32 
Software of Modbus Interface DIII ............................................................................................................... 40 
1 Software releases ................................................................................................................................... 40 
2 Software update with Updater ............................................................................................................... 40 
2.1 Updater ............................................................................................................................................ 40 
2.2 Method 1) Update with the PC USB cable EKPCCAB*. .................................................................... 41 
2.3 Method 2) Update with a USB/RS485 converter. ............................................................................ 43 
Modbus Interface DIII test operation ........................................................................................................... 45 