Siemens ProtoAir Start-up Guide
Page 32 of 66
Appendix A.3 Checking Wiring and Settings
• No COMS on Modbus RTU side. If the Tx/Rx LEDs are not flashing rapidly then there is a COM
issue. To fix this, check the following:
o Visual observations of LEDs on ProtoAir (Appendix A.4)
o Check baud rate, parity, data bits, stop bits
o Check Detector ID matches the correct device
o Verify wiring
o Verify the device was listed under the Web Configurator Active Profiles (Section 6)
• Field COM problems:
o Visual observations of LEDs on the ProtoAir (Appendix A.4)
o Verify IP Address setting
o Verify wiring
NOTE: If the problem still exists, a Diagnostic Capture needs to be taken and sent to technical
support. (Appendix A.5)
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