AERCO XPC GATEWAY Communications - Manual (Page 88)

GATEWAY COMMUNICATIONS MANUAL
88
SECTION 14 TROUBLESHOOTING
14.1 MOST COMMON COMMUNICATION PROBLEMS
The following are some communication problems that are common to all protocols.
14.1.1 No Receive LED Indication
This means that no AERCO equipment is seen by the XPC. Check the configuration and wiring.
14.1.2 Wiring termination
If wiring an EIA-485 connection, the wire is terminated plus (+) to plus (+) and minus (-) to minus (-).
If the receive LED is solid, this means you have the connection incorrectly terminated.
If the wiring is an EIA-232 connection, the wire must connect TX to RX. The GND must be connected
to GND. The termination resistor may be wrong. Remove it temporarily.
14.1.3 Jumper selection
Make sure the jumper for the communication port is set to the communication networks wiring type
EIA-485 or EIA-232.
14.1.4 Dipswitch selection
Make sure the correct protocol is chosen. Switches 5, 6, 7, & 8.
Make sure the correct baud rate is chosen. Switches 1 & 2.
NOTE
These settings are defined at translator start-up. Power must be cycled to
make a settings change.
14.1.5 Addressing
The rotary address switches define the translator’s individuality on the network. Each device must
have a unique address.
14.2 BACNET OVER ARC156
Verify BAS and controller settings:
1. Communication Selection jumper is set to BACnet over ARC156
2. BAS configured to speak 2—wire EIA--485 to the translator.
3. Rotary address switches set for the controller’s unique slave address.
4. Proper connection wiring.
5. BAS reading or writing to the proper BACnet objects in the translator - download the latest points list
for the translator to verify.
6. BAS is sending requests to the proper ARC156 MAC address of the controller.
7. Confirm the correct BACnet network number.
8. Present the BAS company with a copy of your translator’s BACnet PICS so that they know which
BACnet commands are supported.