TSI Pressura RPM20 Hospital Room Pressure Monitors generate Modbus read errors

Issue

Although data is read correctly from the TSI Pressura RPM20 Hospital Room Pressure Monitor when integrated to a SmartStruxure Solution Automation Server, Modbus read errors and framing errors are seen .

Product Line

SmartStruxure Solution

Environment

SmartStruxure Solution Automation Server

SmartStruxure Solution Automation Server Premium

Modbus RTU

Cause

The instruction manual from the manufacturer incorrectly lists the Modbus communication parameters for the RPM20 as 9600 baud, 8 data bits, 2 stop bits and no parity.

Resolution

The instruction manual from the manufacturer incorrectly lists  the Modbus communication parameters for the RPM20 as 9600 baud, 8 data bits, 2 stop bits and no parity.

Investigation of the data from the device shows that the Modbus communications parameters are:

9600 baud, 8 data bits, 1 stop bit and no parity.

Ensure that these parameters are set in the Automation Server Modbus Master Network configuration