Danfoss VLT 6000 HVAC Operating Instructions Manual page 41

804 Selection:
Time out function
Function:
The time out timer is triggered at the first
reception of a valid control word, i.e.,
bit 10 = ok.
The time out function can be activated in two
different ways:
The VLT remains in the time out state until
one of the following four conditions is true:
VLT 5000 parameters are shown in parenthesis, where applicable.
40
Off
(NO FUNCTION)
Freeze output frequency
(FREEZE OUTPUT FREQ.)
Stop with auto restart
(STOP)
Output frequency = JOG freq.
(JOGGING)
Output frequency = Max. freq.
(MAX SPEED)
Stop with trip
(STOP AND TRIP)
Control without DeviceNet
(NO COM OPT CONTROL)
Select set-up 4
(SELECT SET UP 4)
1. The drive does not receive a
LonWorks command addressed to it
within the specified time.
2. Parameter 805 is set to "bit 10 = 0
time out" and a control word with "bit
10 = 0" is sent to the drive.
1. A valid control word (Bit 10 = ok) is
received and the drive is reset
through the bus, the digital input
terminals or the local control panel.
(Reset is only necessary when the
time out function Stop w/trip is
selected.) Control via LonWorks is
resumed using the received control
word.
2. Local control via the local control
panel is enabled.
3. Parameter 928, Access to process
control , is set to Disabled .
Normal control via the digital input
terminals and the RS-485 interface is
now enabled.
Factory setting
VLT ® 5000 / VLT ®
4. Parameter 804, Bus time out function ,
is set to Off.
[0] Control via LonWorks is resumed and
the most recent control word is used.
[1]
Description of Selections:
[2]
• Freeze output frequency . Maintain
[3] present output frequency until
communication is resumed.
[4] • Stop with auto restart . Stop and
automatically restart when
[5] communication is resumed.
• Output frequency = JOG freq . Drive
[6] will produce JOG frequency set in
parameter 209 (213), Jog frequency ,
[7] until communication is resumed.
• Output frequency = Max. freq . Drive
will produce maximum output
frequency (set in parameter 202,
Output frequency ) until
communication is resumed.
• Stop with trip. Drive stops and
requires a reset command before it
will restart.
• Control without LonWorks . Control via
LonWorks is disabled. Control is
possible via digital input terminals
and/or standard RS-485 interface
until LonWorks communication is
resumed.
• Select setup 4 . Setup 4 is selected in
parameter 002 (004), Active setup ,
and settings of setup 4 are used.
Parameter 002 (004) is not reset to
the original value when
communication is resumed.
MG.60.N2.02 - VLT is a registered Danfoss trademark
6000 HVAC / VLT ® 8000 AQUA