ProtoNode FPC-N34 & FPC-N35 User Manual
APPENDIX E: TROUBLESHOOTING
OMM-0150_B
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Appendix E-5: LED Diagnostics for Modbus RTU Communications Between
ProtoNode and Devices
Please see the diagram below for ProtoNode FPC-N34 and FPC-N35 LED locations.
Figure E-4: Diagnostic LEDs
Tag
Description
SPL
The SPL LED will light if the ProtoNode or any of the devices is off line.
For FPC-N35
, the LED will also light until ProtoNode is Commissioned on the
LonWorks network.
RUN
The RUN LED will start flashing 20 seconds after power indicating normal operation.
ERR
The SYS ERR LED will go on solid 15 seconds after power up. It will turn off after 5
seconds. A steady red light indicates a system error on ProtoNode. If this occurs,
immediately report the related “system error” shown in the error screen of the GUI
interface to Sierra Monitor for evaluation.
NOTE:
A possible cause for this LED to go on solid for BACnet MSTP is when the
MAC Address is greater than 127 and the
“bac_max_master” is 127 or less.
RX
The RX LED will flash when a message is received on the host port.
TX
The TX LED will flash when a message is sent on the host port.
PWR
This is the power light and should show steady green at all times when ProtoNode is
powered.
Diagnostic
LEDs
