Troubleshooting N2 - Carrier WSHP Open v3 Integration Manual

Connect the N2 EIA-485 network to the controller's J19 Network Comm port. Connect to Net+, Net-, and
5
SHLD.
Wire specifications
A dedicated 22 AWG shielded twisted pair wire (EIA 485)
○
Maximum wire length 2000 feet (610 meters) or 32 nodes
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Devices should be daisy-chained and not star-wired
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Attach the drain/shield wire to both ends of the network segment and through every controller
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NOTE Use the same polarity throughout the network segment.
Turn on the WSHP Open's power.
6

Troubleshooting N2

Check the following to troubleshoot your WSHP Open:
Verify that the BAS and controller are both set to speak N2 protocol on the Comm Selector DIP switches DS3 -
1
DS6.
The BAS and the controller are both set for the same baud rate:
2
9600 for N2
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Baud rate DIP switches DS2 and DS1
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Obtain a Modstat of the controller. Scroll to the bottom of the page to Network Communications to view
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the active protocol and baud rate.
The BAS is configured to speak 2-wire EIA-485 to the controller. The BAS may have to configure jumper or DIP
3
switches on their end.
The BAS and the controller have the same communication settings (8 data bits, No Parity, and 1 stop bit).
4
•
Proper connection wiring between the BAS and the controller.
Verify that the rotary address switches are set for the controller's unique slave address.
1
BAS must be reading or writing to the proper point addresses on the controller.
2
BAS is sending requests to the proper slave address of the controller.
3
NOTES
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Refer to Appendix A (page 35) for the Network Points list.
•
Refer to Appendix D (page 48) for the Protocol Implementation Conformance Statement.
WSHP Open v3
Integration Guide
17
Communications wiring
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