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iSMA-B-LP Modbus User Manual


Introduction

The iSMA-B-LP is a wall panel with 2.3” LCD display and four function buttons. Additionally, the panel has a built-in temperature sensor and, optionally, humidity and CO2 sensors.

The iSMA-B-LP is powered with 24 V AC/DC and has a built-in RS485 port (Modbus RTU/ASCII and BACnet MS/TP). The use of open communication protocol allows to connect the panel with any controller, which supports Modbus RTU/ASCII or BACnet MS/TP. Connected to the iSMA controllers, the panel allows to change the basic parameters such as: temperature setpoint, fan speed, FCU mode, and other. Thanks to a built-in USB port, there is a possibility of updating firmware and configurating the panel without the need of power supply. The iSMA-B-LP has modern design and is available in different colors (white is basic), on client’s request.

This user manual outlines Modbus registers available in the iSMA-B-LP room panel and describes their configuration.

LP_persp.png

LP_persp.png


LP panels

Revision History


Date

Rev.

Description

30 Jan 2025

1.5

  • Corrections in the technical specification table

  • Sensors's filters default value corrected

  • Updated DEVICE_CONFIGURATION register description

  • OFFSET_RANGE limit values corrected

  • Updated description of time displaying

25 May 2022

1.4

Rebranded

16 Nov 2017

1.3

Added new version of the panel (iSMA-B-LP(-XX)-1)

6 Jun 2017

1.2

Added information about BACnet MS/TP protocol

21 Feb 2017

1.1

New function:

  • Added SubmenuIconDisplayOFF bit in DeviceConfiguration register to disable displaying of submenu icons;

Changes in document:

  • Added SubmenuIconDisplayOFF bit description in DeviceConfiguration section

  • Added description of Submenu Boolean All Present Value registers

20 Apr 2017

1.0

First edition


Revision history

This user manual outlines Modbus registers available in the iSMA-B-LP room panel and describes their configuration.