Carrier RTU Open User Manual

32
lists information about the board status and networking state. For
basic troubleshooting, see Table 6. Refer to the RTU Open v3 Inte-
gration Guide for additional information.
Table 5 — Manufacture Date
When troubleshooting, you may need to know the manufacture date of the control module.
Obtain the manufacture date from a... Notes
Module status report (Modstat) To obtain a modstat with Field Assistant:
1. Press Function (FN) key and hold.
2. Then press period (.)
3. Release both buttons.
The report shows the date under Main board hardware.
Sticker on the control board
“Serial No: OR2YMCxxxP”
(Bar Code and Typed Number)
The serial numbers are unique and contain embedded information, for example OR2420042P:
“OR2” — These first three digits are unique to RTU Open and are used as an identifier.
“YM” — These two digits identify the last digit of the year and month (in hex, A=10/Oct) of
manufacture. “92” would represent a date of manufacture of “Feb 2019”.
“C” — Thousands counter 0-9 and A-Z; A = 10; Z = 35
“xxx” — These three digits represent the sequential number of units produced for a given product
for the mentioned manufacturing time period.
“P” — This final digit represents the decade and toggles between “N” and “M” every ten years.
Table 6 — Basic Protocol Troubleshooting
Problem Possible cause Corrective action
No communication with third
party vendor
Incorrect settings on SW1, SW2 and SW3 Verify and correct switch settings. Cycle
power to RTU Open after changing switch
settings.
RS485 Port has no voltage output
(check with RTU Open disconnected from RS485
communication bus):
Verify RTU Open has correct power
supply.
• BACnet @ 9600/19.2K – 0.01 to 0.045vdc
• BACnet @ 38.4K – 0.06 to 0.09vdc
• BACnet @ 76.8K – 0.1vdc
• Modbus @ 9600 – 76.8K – 0.124vdc
• N2 @ 9600 - 0.124vdc
Possible bad driver on board.
Check RS485 bus for external voltage before
reconnecting to the bus.
Verify devices are daisy chained and repeaters and bias terminators
are correctly installed.
Check third party vendor RS485
communication wiring guidelines and
troubleshooting procedures.

Carrier RTU Open Specifications

General

Brand	Carrier
Model	RTU Open
Category	Controller
Language	English