Vacon 20, Руководство пользователя

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5
vacon • 10 Fieldbus parametrization
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
5. F
IELDBUS PARAMETRIZATION
The following chapter describes briefly how to parametrise the AC drive in order for the motor to be
controllable via fieldbus. These instructions are written for basic applications. For more
information, consult the application-specific manual.
In order for the AC drive to accept commands from the fieldbus network, the control place of the AC
drive has to be set to fieldbus. The default value of the parameter "Control Place" is usually I/O. Note
that if the control unit firmware is updated, the default settings are restored. In addition, some
applications may have the remote speed reference selection set by default to other than fieldbus. In
these cases, the speed reference selection must be set to fieldbus, in order for the speed reference
to be controlled via fieldbus.
NOTE! The motor control mode should be selected to support the used process and profile.
The navigation path to the fieldbus parameters may differ from application to application. The
exemplary paths below apply to the VACON
®
20 family AC drive.
5.1 Fieldbus control and basic reference selection
The following tables list some of the parameters related to fieldbus control. See the application
specific manuals for more detailed information.
Parameters can be read and written by using the drive panel, PC Tool or fieldbus protocol. Notice
that some of connection parameters for fieldbus may need to be set (depending on your
configuration) via panel or PC tool, before you can connect over fieldbus and write application
parameters.
5.2 Modbus RTU parameters and monitoring values
Table 3. Parametrization for VACON
®
20 family AC drive (Standard application)
Parameter name Value
Control mode Frequency Speed
Remote control place Fieldbus CTRL
Local / remote Remote
Fieldbus ref. sel. Fieldbus
Table 4.
Code Parameter Min Max Unit Default ID Description
When no fieldbus board or no OPTBH board has been installed, the following values are visible:
V2.1 Communication status 808
Status of Modbus communication.
Format: xx.yyy where
xx = 0 - 64 (Number of error messages)
This counter saturates when 64 error
messages are detected
yyy = 0 - 999 (Number of good messages)
This counter restarts counting from 0
when 999 good messages are detected