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VLT is a registered Danfoss trademark
Power up
1. Turn BACLink power switch to OFF. This prevents
BACLink from power up before proper voltage is verified.
2. Ensure that power is applied to the drives.
3. Plug connector from transformer to BACLink 24 VAC
power terminal.
4. Ensure that 24 VAC is present at BACLink power input
terminals.
5. Turn BACLink power switch to ON. Power, Run and Error
LEDs turn on. Run and Error LEDs then begin blinking.
Error LED turns off.
Troubleshooting drive communication
For use in the event of trouble communicating with the drives. Test
conditions for BACLink portal communications:
1. Test only one drive connected to portal at a time.
2. Portal power OFF.
SYMPTOM
CAUSE
SOLUTION
Link LED is OFF.
Lan LED is OFF.
•
Network speed set to
100kbps.
•
BACLink board not
connected to network
•
Portal address not
set for network or not
recognized.
•
Set network speed for 10kbps.
•
Connect board to network.
•
Ping portal to test communications. To
ping portal, go to a DOS prompt on any
network computer. Type “ping” and the
portal address (displayed on the IP
address label on the unit) and press
enter. If communicating, you will get a
reply. If not communicating, you will get
no response indication.
SYMPTOM
CAUSE
SOLUTION
Transmit LED ON steady
and receive LED OFF.
Reversed polarity to drive or short in
EIA-485 cable.
Reverse wires to drive terminals 68
(+) and 69 (-) or remove short.
Transmit LED blinks slowly 3
times, then pauses and
repeats 3 blinks.
•
Drive not ON.
•
Drive not set for N2 protocol in
parameter 500.
•
Drive serial bus address not
correct in parameter 501.
•
Network cable not connected.
•
For VLT 6000: termination
switches on drive in wrong
position.
•
Apply power to drive.
•
Set parameter 500 for N2
protocol.
•
Set drive address in
parameter 501.
•
Connect network cable to
unit.
•
Set termination switches 2
and 3 to ON position.
Table V. Troubleshooting Drive Communication
Table VI. Troubleshooting Ethernet Communication
3. For VLT 6000, termination DIP switches 2 and 3 should be
in the ON position. Termination DIP switches are located on
VLT 6000 power board directly above drive terminals
where connections to terminals 68 and 69 are made.
4. Drive power ON.
5. Apply power to portal and wait 20-25 seconds. (See
Table V for test results.)
Troubleshooting Ethernet communication
With the BACLink portal connected to BACnet network through the
Ethernet connector, apply power to BACLink portal and switch
portal ON. See Table VI for test results.
Loss of signal recovery time
When serial communication is lost to the drive, recovery time to
reestablish communication with the network can take up to
5 minutes.
