Troubleshooting Arc156 Communication; Modbus; To Set Up The Wshp Open For Modbus - Carrier WSHP Open v3 Integration Manual

Troubleshooting ARC156 communication

The most common communication problems result from not properly following the configuration steps outlined
above in this manual. Review all of the steps and use the following list to check your settings.
Verify accuracy of the following:
•
Protocol DIP switches DS3 - DS6
•
Proper connection wiring
•
Unique rotary address switches 1 – 99. If controllers have duplicate addresses, network communication can
be lost.
•
Unique BACnet Device Instance numbers. Default is 16101XX, with the rotary address switches defining XX. If
controllers have duplicate device instance numbers, network communication can be lost.
NOTES
•
The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.
•
If RX LED is solid, then the terminations are incorrect.
•
If the network has greater than 32 devices or exceeds 2,000 feet, a Repeater should be installed.
•
If a controller begins or ends a network segment, a terminating resistor may be needed.
Software settings defined through the Equipment Touch device. To confirm settings, obtain a Modstat of the
device. On the Equipment Touch, click the link to the Modstat.

Modbus

To set up the WSHP Open for Modbus

Refer to Appendix C (page 46) for the Modbus Protocol Implementation Conformance Statement (PICS).
Turn off the WSHP Open's power.
1
NOTE Changes made to the switches when the controller is on will not take effect until the power is cycled!
Using the rotary switches, set a unique Modbus slave address for the WSHP Open. Set the MSB (SW1) switch
2
to the tens digit of the address, and set the LSB (SW2) switch to the ones digit. Valid Modbus slave
addresses are 01-99.
EXAMPLE To set the controller's Modbus slave address to 01, point the arrow on the MSB (SW1) switch to 0
and the arrow on the LSB (SW2) switch to 1.
M S B S W2
S W1
0
10's
WSHP Open v3
Integration Guide
L SB
0
1's
13
Communications wiring
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