Danfoss VLT Series Programming Manual page 69

Parameter Description
[160] No alarm
3 3
[161] Running
reverse
[165] Local
reference
active
[166] Remote
reference
active
[167] Start
command
active
[168] Drive in hand
mode
[169] Drive in auto
mode
[180] Clock Fault
[181] Preventive
Maintenance
[190] No-Flow
[191] Dry Pump
[192] End of Curve
[193] Sleep Mode
[194] Broken Belt
[195] Bypass Valve
Control
68
®
VLT HVAC Drive Programming Guide
Action [43] Set dig. out. F high is executed.
The input will go low whenever the Smart
Logic Action [37] Set dig. out. F low is
executed.
The output is high when no alarm is
present.
The output is high when the frequency
converter is running counter clockwise (the
logical product of the status bits 'running'
AND 'reverse').
The output is high when 3-13 Reference Site
= [2] Local or when 3-13 Reference Site =
[0] Linked to hand auto at the same time as
the LCP is in [Hand on] mode.
The output is high when 3-13 Reference Site
[1] or Linked to hand/auto [0] while the LCP
is in [Auto on] mode.
The output is high when there is an active
Start command (i.e. via digital input bus
connection or [Hand on] or [Auto on], and
no Stop command is active.
The output is high when the frequency
converter is in Hand on mode (as indicated
by the LED light above [Hand on].
The output is high when the frequency
converter is in Hand on mode (as indicated
by the LED light above [Auto on].
The clock function has been reset to
default (2000-01-01) because of a power
failure.
One or more of the Preventive
Maintenance Events programmed in
23-10 Maintenance Item has passed the
time for the specified action in
23-11 Maintenance Action.
A No-Flow situation or Minimum Speed
situation has been detected if enabled in
22-21 Low Power Detection and/or
22-22 Low Speed Detection.
A Dry Pump condition has been detected.
This function must be enabled in 22-26 Dry
Pump Function.
A pump running with max. speed for a
period of time without reaching the set
pressure has been detected. To enable this
function please see 22-50 End of Curve
Function.
The frequency converter/system has turned
into sleep mode. See par. 22-4*.
A Broken Belt condition has been detected.
This function must be enabled in
22-60 Broken Belt Function.
The bypass valve control (Digital / Relay
output in the frequency converter) is used
for compressor systems to unload the
compressor during start-up by using a
bypass valve. After the start command is
MG.11.CC.02 - VLT
[196] Fire Mode
[197] Fire Mode
was act.
[198] Drive Bypass
The below setting options are all related to the Cascade
Controller.
Wiring diagrams and settings for parameter, see group 25-
** for more details.
®
is a registered Danfoss trademark
given the bypass valve will be open until
the frequency converter reaches 4-11 Motor
Speed Low Limit [RPM]) . After the limit has
been reached the bypass valve will be
closed, allowing the compressor to operate
normally. This procedure will not be
activated again before a new start is
initiated and the frequency converter
speed is zero during the receiving of start
signal. 1-71 Start Delay can be used in
order to delay the motor start. The Bypass
valve control principle:
Speed
REF
Speed
Min
ON
OFF
ON
OFF
Start Stop
The frequency converter is operating in
Fire Mode. See parameter group24-0* Fire
Mode.
The frequency converter has been
operating in Fire Mode, but is now back in
normal operation.
To be used as signal for activating an
external electromechanical bypass
switching the motor direct on line. See
24-1* Drive Bypass.
CAUTION
If enabling the Drive Bypass Function,
the frequency converteris no longer
Safety Certified (for using the Safe
Stop in versions where included).
Time
Time
Time