Distech Controls ECL/ECB-PTU Series User Manual

BACnet Troubleshooting
Network Guide 113
Table 30: STATUS LED Fault Condition Interpretation for ECB Devices
The STATUS LED is
always ON (ECB PTU
Series only)
No anomaly Normal operation.
Table 29: STATUS LED Interpretation for Normal Operation with ECB Devices
Device STATUS LED
blink patterns
Status Description
Device STATUS LED
blink patterns -
every 2 seconds
(highest priority
shown first)
Possible Cause Corrective Action
Long Long Long blink
(800ms On, 300ms
Off, 800ms On, 300ms
Off, 800ms On)
Offline The device has not received a BACnet token, and therefore cannot communicate
on the network: Verify that the controller's MAC Address is unique on the BACnet
MS/TP Data Bus - see About the MAC Address on page 31. Make sure the con-
troller's baud rate is the same as the BACnet MS/TP Data Bus' baud rate (see
Maximum Number of BACnet MS/TP Devices on a Data Bus Segment and Baud
Rate on page 14). Verify that the Max Master is set high enough to include this
controller's MAC Address (see Setting the Max Master and Max Info Frames on
page 34).
Short Short Long blink
(150ms On, 300ms
Off, 150ms On, 300ms
Off, 800 ms On)
Poor-quality power.
The device has
browned-out (for 24V
controllers)
The voltage at the 24VAC/DC and 24VCOM terminals was not at an acceptable
level during power up.
Short Long blink
(150ms On, 300ms
Off)
Invalid MAC address The device's MAC address is set to zero (0) or is set to an address higher than
the Max Master. See BACnet MS/TP Data Bus Token-Passing Overview on page
32.
Table 31: Verify that the Following Recommendations have been Carried Out Before Calling Technical Support
Recommendation Description
Properly terminate the BACnet MS/
TP data bus
EOL terminations must be enabled / installed at either end of the data bus only. See Figure
71.
Avoid duplicate MAC Addresses Verify that no device has a duplicate MAC Address by checking the MAC Address DIP switch
settings on all devices on the data bus, including segments connected by a repeater.
If necessary, isolate devices from the data bus to narrow-down the number of devices that
may be at fault.
All devices must be set to the same
baud rate
When all devices are set to AUTO baud rate, at least one device must be set to a baud rate,
usually the data bus master. See Maximum Number of BACnet MS/TP Devices on a Data
Bus Segment and Baud Rate on page 148.

Distech Controls ECL/ECB-PTU Series Specifications

General

Brand	Distech Controls
Model	ECL/ECB-PTU Series
Category	Controller
Language	English