51
9.4
Protection oat the time of communication option use
When attaching communication option DBIF-2009 to VFDB2009 dynamic brake sysytem and communicating
with VF66 series inverter, if DB unit becomes the protection mode of Table 9.1, it will be displayed on the
display for indication of an inverter as "db*" (* numerical value of station number). Furthermore, also when
communication cuts, an inverter serves as protection mode and is displayed on the display for indication of
an inverter as "db*" (* numerical value of station number). However, the distinction in the protection mode of
DB unit cannot do an inverter.
An inverter detects communicative cutting. Therefore, DB unit does not serve as protection mode. An
inverter should serve as protection mode, and when DB unit is not in protection mode, please check the
loose connection of a communication connector, cutting of a communication line, wiring of a
communication line, and the preset value of DB unit and the preset value of an inverter.
When performing communication with DB unit and an inverter, the inverter can respond by the following
function to the protection mode (communicative cutting is included) of DB unit.
At the time of the protection mode of DB unit, it can be chosen whether operation is continued for an
inverter in protection mode, or it stops. Refer to "7.1.7 Set-up of the inverter at the time of communication
option PC board use" for the change method.
In the protection mode state of DB unit, multi-function output terminal of an inverter to an output is
possible. The preset value H-00-05 (any one) of multi-function output terminal of an inverter to be used
is set as 22. Refer to the instructions manual of a VF66B series inverter for the preset value of an
inverter.
It is possible to communicate the protection mode state of DB unit to a higher rank unit (sequencer etc.)
through the digital communications option independently attached to an inverter. Refer to the
instructions manual of a VF66B series inverter, and the instructions manual of each digital
communications option for a digital-communications option.
When DB unit switches an inverter to an operation stop in protection mode by the above-mentioned at
the time of protection mode, if DB unit becomes protection mode, the data at the time of protected
operation will be memorized by one point traceback function of an inverter, a protection history function,
and traceback function, and quick restoration is attained. About each function of one point traceback
function of an inverter, a protection history function, and traceback function, refer to the instructions
manual of a VF66B series inverter, and the instructions manual of VF66PCTool.
Summary of Contents for VFDB2009 Series
Page 1: ...VFDB2009 Operation Manual...
