Danfoss VLT Programming Manual page 63

Parameter Description
[84] SL Digital
Output E
[85] SL Digital
3 3
Output F
[160] No alarm
[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
62
®
VLT HVAC Drive Programming Guide
See 13-52 SL Controller Action. The input will
go high whenever the Smart Logic Action
[42] Set dig. out. E high is executed. The input
will go low whenever the Smart Logic Action
[36] Set dig. out. E low is executed.
See 13-52 SL Controller Action. The input will
go high whenever the Smart Logic 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
MG.11.CB.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
for compressor systems to unload the
compressor during start-up by using a
bypass valve. After the start command is
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
M in
ON
OFF
ON
OFF
Star t St op
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.
If enabling the Drive Bypass Function, the
frequency converter is no longer Safety
Certified (for using the Safe Stop in versions
where included).
T ime
T ime
T ime