Hyperstat as Modbus Slave

4 Minute Read

|Overview

The HyperStat is part of 75F's vertically-integrated suite of intelligent building solutions, delivering multi-mode sensing, remote monitoring and individual zone control for comfort and productivity of building occupants, for more information on refer to HyperStat Installation & Hyperstat UI.

The HyperStat hardware is capable to work as a dependent device configured with a 75F's CCU configured for various system level profiles, or with any external Modbus or BACnet devices as a Modbus or BACnet slave. Moreover, it can also work as an independent or standalone device which can work as per profiles which can be configured in the Hyperstat itself.

The Hyperstat as Modbus slave feature provides the capability to the customer, to configure a Hyperstat with any Modbus device and read the data from Modbus device in a certain format.

|Wiring

The wiring that is used to connect a modbus device to a Hyperstat is called RS485 system. The RS485 connector uses a three wire protocol as shown below.

It comprises of a earthing wire and a twisted pair of wires. Every modbus device has a 'A' and 'B' indication in them, for aiding the wiring.

The earthing or the ground wire is usually earthed only in one point. Normally, this connection is made at one end of the main cable, in this case it is connected to the ground point of the Hyperstat.

For the Twisted pair of wire there is no specific color criteria that is followed, it can be of any color. The wire that is connected to the 'A' indication point in the Modbus device is connected to the 'A' indication point in the Hyperstat, and the wire that is connected to the 'B' indication point in the Modbus device is connected to the 'B' indication point in the Hyperstat.

For other factors to be considered while wiring a RS485 cable kindly refer Modbus Wring and General Guidelines

|Configuration

From the home screen of the UI 

• Press the + & - buttons together to navigate to the other screens of the Hyperstat

The Inputs screen is displayed initially

• Press the next button to navigate to the Communication options screen

The communications  options screen is displayed.

• Press the down arrow to navigate to the the options available under the screen.

• Press the select option to modify the protocol

• Press the up arrow to select Modbus option.

• Press deselect and press confirm to confirm the comm option selection.

The Hyperstat is configured as a Modbus slave and it restarts.

|Configuration Parameters

Further navigate again to the communications screen from the Hyperstat home screen UI

• Press the to navigate to the options available
• Press the select option to modify the configuration parameter Modbus address.

• Use the up   or down or use the touch slider to modify the modbus address.

• Press deselect to confirm selection.
• Press the to navigate to the options available
• Press the select option to modify the configuration parameter Baud rate.
• Use the up   or down   buttons to modify the Baud rate.

• Press deselect to confirm selection.

• Press the to navigate to the options available
• Press the select option to modify the configuration parameter Parity.
• Use the up   or down to modify the modbus address.

• Press deselect to confirm selection.

• Press the to navigate to the options available
• Press the select option to modify the configuration parameter Stop bits.
• Use the up   or down to modify the modbus address.

• Press deselect to confirm selection.

The Hyperstat is configured as a modbus slave and the corresponding configuration parameters are configured, and the device is ready read the data from Modbus device in a certain format.

Note: Attached in this article is a file with the information related to Modbus Mapping for HyperStat.