Programacion

VLT® 5000 DeviceNet and Allen Bradley Control logix 5550

Foreword .......................................................................... 2
VLT 5000 DeviceNet card ............................................... 2
Configuring the VLT 5000 with RS Networx ............... 4
I/O communication with RS Logix 5000 ...................... 6
Explicit messages with RS Logix 5000......................... 8

MN.51.T1.02 - VLT is a registered Danfoss trademark

1

VLT® 5000 DeviceNet and Allen Bradley Control logix 5550
s Foreword
This application note describes how to set up
DeviceNet communication between a Danfoss VLT
5000 frequency converter and 1756-DNB DeviceNet
Scanner from Allen Bradley. It is assumed that you
have some knowledge of Control Logix 5550, the
1756-DNBScanner and ladder logic.
This note describes:
q VLT 5000 DeviceNet card
q Configuring of the VLT 5000 with RS Networx
q I/O communication with RS Logix 5000
q Explicit messages with RS Logix 5000

NOTE!:
The examples do not describes all the
functions needed for a real application, for
example error handling.
The examples are based upon that a RS Logix5000
project has been created, andthe 1756-DNB has
been added to the I/O configuration.
Details of some of the components/software:
VLT5000 with DeviceNet - Host chip version 2.9.
1756-DNB Series A Firmware Revision 3.3
RS Networx 2.11.51
RS Logix 2.25

s VLT 5000 DeviceNet card
The photo shows the DeviceNet card which can
be installed in VLT 5001 - 5500.

Revisions number
18115D

Device status
LED

Network statusLED

Device status
LED
Network status
LED

Address switch and
baud rate setting
OFF = 1
ON = 0

2

MN.51.T1.02 - VLT is a registered Danfoss trademark

VLT® 5000 DeviceNet and Allen Bradley Control logix 5550
s DeviceNet connection
5
4
3
2
1

V+
CAN_H
drain
CAN_L
V–

red
white
bare
blue
black

12345

s DeviceNet termination
Termination resistors should beinstalled 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

MN.51.T1.02 - VLT is a registered Danfoss trademark

It is recommended to use the same cable type in
the entire network to avoid impedance mismatch.
s Address and baud rate setting
Dipswitch 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 asfollow:
ON

For the network status LED:
1. when the LED is off, the network is nonpowered/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.

Max. totalcable length [m]
500
250
100

s Cable specification
- Cross section: max. 0.78 mm2,
corresponding to AWG 18
- Cable type:
twisted in pairs, 2 x 2 wires with
drain wire in center
- Screening:
Copper-braided screen
or braided screen and foil screen

1234567 8

s LEDs
For the device status LED:
1. when the LED is off, the device is off
2. when the LED is green, the device isoperational
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

s Cable length
Transmission speed
125 kBaud
250 kBaud
500 kBaud

ON = 0
OFF = 1

Switch Settings for DeviceNet...