Danfoss VLT 5000 Application Note page 3

DeviceNet connection
DeviceNet termination
Termination resistors should be installed at each end
of the bus line.
The resistors must be mounted between terminal 2
CAN_L and terminal 4 CAN_H and should have the
following specification:
121 Ohm, 1 % Metal film and 1/4 Watt
LEDs
For the device status LED:
1. when the LED is off, the device is off
2. when the LED is green, the device is
operational
3. When the LED is flashing green, the device
is in standby
4. when the LED is flashing red, the device
detects a minor fault
5. when the LED is red, the device detects
an unrecoverable fault
6. when the LED is flashing red/green, the
device is self testing
For the network status LED:
1. when the LED is off, the network is non-
powered/not online
2. when the LED is flashing green, the
network is online but not connected
3. when the LED is green, the network is
online and connected
4. when the LED is flashing red, the network
has a connection time-out
5. when the LED is red, the network has a
critical link failure.
MN.51.T1.02 - VLT is a registered Danfoss trademark
VLT ® 5000 DeviceNet and Allen Bradley Control logix 5550
Cable length
Transmission speed
125 kBaud
250 kBaud
500 kBaud
Cable specification
- Cross section:
- Cable type:
- Screening:
It is recommended to use the same cable type in
the entire network to avoid impedance mismatch.
Address and baud rate setting
Dip switch 1-6 set the VLT frequency converters
address and 7-8 the baud rate.
When setting the address/Mac ID you must ensure
that each device on the network has a unique
address. The address/Mac ID can be read in
parameter 918 Mac ID.
Switch 6 is the Most Significant Bit (MSB) and
Switch 1 is the Least Significant Bit (LSB).
If the address is to be set to 3, the dip switches
should be set as follow:
Switch Settings for DeviceNet Module Baud Rate:
Max. total cable length [m]
max. 0.78 mm
corresponding to AWG 18
twisted in pairs, 2 x 2 wires with
drain wire in center
Copper-braided screen
or braided screen and foil screen
ON = 0
OFF = 1
Baud Switch
Rate Setting
8
125 kBPS 0
250 kBPS 0
500 kBPS 1
125 kBPS 1
500
250
100
2 ,
Switch
Setting
7
0
1
0
1
3