IntesisBox
®
ModBus RTU
– Fujitsu
User Manual r1.0 EN
© Intesis Software S.L.U. - All rights reserved
This information is subject to change without notice
IntesisBox
®
is a registered trademark of Intesis Software SLU
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4/21
INDEX
1
Presentation .......................................................................................................................................................... 5
2
Connection ............................................................................................................................................................ 6
Connect to the AC indoor unit ....................................................................................................................... 6
Connection to the EIA-485 bus ..................................................................................................................... 6
3
Quick Start Guide .................................................................................................................................................. 7
4
Modbus Interface Specification ............................................................................................................................. 8
Modbus physical layer ................................................................................................................................... 8
Modbus Registers ......................................................................................................................................... 8
4.2.1
Control and status registers ................................................................................................................... 8
4.2.2
Configuration Registers ....................................................................................................................... 10
4.2.3
Considerations on Temperature Registers .......................................................................................... 10
DIP-switch Configuration Interface .............................................................................................................. 12
Implemented Functions ............................................................................................................................... 14
Device LED indicator ................................................................................................................................... 14
EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................................................... 15
5
Mechanical & electrical characteristics ............................................................................................................... 16
6
AC Unit Types compatibility ................................................................................................................................ 17
7
Error codes .......................................................................................................................................................... 18
Intesis Codes ............................................................................................................................................... 18
RAC and VRF J-II / V-II / VR-II series ......................................................................................................... 18
VRF V / S / J Series .................................................................................................................................... 21
