Indications; Installation Of The Devicenet Network; Communication Rate - WEG CFW-11 User Manual

Indications

DeviceNet defines two LEDs for state indication: one for the communication module (MS) and another for the
network (NS).
The MS LED indicates the conditions of the module itself. That is, whether it is able to work or not. The table
below shows the possible states:
LED Status
Off
Green
Red
Flashing green/red
The NS LED provides information about the status of the DeviceNet network. The table below presents the
description of those states.
LED Status
Without power supply or not
Off
online
Online
Green
Flashing green Online
One or more I/O type connections
Flashing red
have expired
Red Serious fault in the link
Equipment
Flashing green/red
diagnosis
2.1.2

Installation of the DeviceNet network

For the connection of the frequency inverter using the DeviceNet interface, the following points must be
observed:

Communication Rate

Equipment with Anybus-CC interface in general allow to configure the desired communication rate, which may
vary from 125 Kbit/s to 500 Kbit/s. A communication rate (baud rate) that can be used by a device also
depends on the length of the cable used in the installation. It worth to mention that, in order to allow the
disconnection of the element from the network without damaging the bus, it is interesting to put active
terminations, which are elements that only play the role of the termination. Thus, any equipment in the network
can be disconnected from the bus without damaging the termination. The table 2.5 shows the relation between
the communication rates and the maximum lengths of the cable which can be used in the installation, according
to the recommendation of ODVA.
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Table 2.2: Characteristics of power supply for the interface
Power Supply (V
Minimum Maximum
11
Current (mA)
Typical
36
Table 2.3: State of the DeviceNet module
Description
Without power supply
Module operating and in normal conditions
Module in error
Equipment performing self-diagnosis
Table 2.4: Status of the DeviceNet network
Description
Equipment is not connected to a DeviceNet network with other equipment
at the same communication rate.
Master has allocated a set of I/O type connection with the slave. In this
, connected stage data exchange by means of I/O type connections does effectively
occur.
Slave has successfully completed the Mac ID verification procedure. This
means that the configured communication is correct (or was detected
, not connected correctly in the case of use of autobaud) and that there are no other nodes
in the network with the same address. However, in this stage, there is not a
set of I/O type connections established.
The I/O data exchange has been interrupted.
It indicates that the slave cannot enter the network because of addressing
problems or due to the occurrence of
used by another device, if the chosen communication rate is correct or if
there are installation problems.
performing self-
It occurs during initialization.
)
DC
Recommended
25 24
Maximum
38
Reinitializing the equipment is required.
It occurs during initialization.
Comments
-
-
Comments
bus off
. Verify if the address is being