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TSI Pressura RPM20 Hospital Room Pressure Monitors generate Modbus read errors

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TSI Pressura RPM20 Hospital Room Pressure Monitors generate Modbus read errors

Picard Product_Support
‎2018-09-11 12:57 PM

Last Updated: Administrator CraigEl Administrator ‎2022-08-11 02:58 AM

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

EcoStruxure Building Operation

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.

ModbusComms.png

Resolution

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

  • 9600 baud
  • 8 data bits
  • 1 stop bit
  • No parity

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

SBOModbusComms.png

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