Parameters: 8-** Communications And Options; Control Word Source; Control Word Timeout Time; Control Word Timeout Function - Danfoss VLT CDS 303 Operating Instructions Manual

Parameter Descriptions
6.9 Parameters: 8-** Communications and
Options
6.9.1 8-0* General Settings
8-01 Control Site
Option: Function:
The setting in this parameter overrides the
settings in parameter 8-50 Coasting Select to
parameter 8-56 Preset Reference Select.
[0] Digital and Control by using both digital input and
ctrl.word control word.
[1] Digital only Control by using digital inputs only.
[2] Controlword Control by using control word only.
only

8-02 Control Word Source

Option: Function:
NOTICE!
This parameter cannot be adjusted
while the motor is running.
Select the source of the control word: one of
two serial interfaces or four installed options.
During initial power-up, the frequency
converter automatically sets this parameter to
[3] Option A if it detects a valid fieldbus
option installed in slot A. If the option is
removed, the frequency converter detects a
change in the configuration, sets
parameter 8-02 Control Word Source back to
default setting RS-485, and the frequency
converter trips. If an option is installed after
initial power-up, the setting of
parameter 8-02 Control Word Source does not
change, but the frequency converter trips and
displays: Alarm 67 Option Changed.
When retrofitting a bus option into a
frequency converter that did not have a bus
option installed to begin with, take an ACTIVE
decision to move the control to Bus based.
This is done for safety reasons to avoid an
accidental change.
[0] None
[1] FC RS-485
[2] FC USB
[3] Option A
[4] Option B
[5] Option C0
[6] Option C1
[30] External Can
MG34M422
Operating Instructions

8-03 Control Word Timeout Time

Range:
[1.0 0.1-18000.0 s Enter the maximum time expected to pass
s]
20 s
*
18000.0 s]

8-04 Control Word Timeout Function

Select the time-out function. The time-out function activates
when the control word fails to be updated within the time
period specified in parameter 8-03 Control Word Timeout Time.
Option:
[0] Off
[1] Freeze output Freezes output frequency until communi-
[2] Stop
[3] Jogging
[4] Max. speed
[5] Stop and trip
[7] Select setup 1 Changes the set-up upon reestablishment of
[8] Select setup 2 See [7] Select setup 1
[9] Select setup 3 See [7] Select setup 1
[10] Select setup 4 See [7] Select setup 1
[26] Trip
Danfoss A/S © Rev. 2013-07-03 All rights reserved.
Function:
between the reception of two consecutive
telegrams. If this time is exceeded, it
indicates that the serial communication has
stopped. The function selected in
parameter 8-04 Control Word Timeout
Function is then carried out. A valid control
word triggers the time-out counter.
[ 0.1 - Enter the maximum time expected to pass
between the reception of two consecutive
telegrams. If this time is exceeded, it
indicates that the serial communication has
stopped. The function selected in
parameter 8-04 Control Word Timeout
Functionis then carried out. A valid control
word triggers the time-out counter.
Function:
Resumes control via serial bus (fieldbus or
standard) using the most recent control
word.
cation resumes.
Stops with auto restart when communi-
cation resumes.
Runs the motor at JOG frequency until
communication resumes.
Runs the motor at maximum frequency until
communication resumes.
Stops the motor, then resets the frequency
converter to restart: via the fieldbus, via
[Reset], or via a digital input.
communication following a control word
time-out. If communication resumes after a
time-out, parameter 8-05 End-of-Timeout
Function defines whether to resume the set-
up used before the time-out, or to retain
the set-up endorsed by the time-out
function.
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