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Product Description
SBM51/06
Datasheet 2.50-40.051-71-EN
Function description
Function of the Analog Setpoint and Parameter Set Switching
The central unit specifies a frequency setpoint for each frequency inverter via the parameter
2240 “Q
analog setpoint 1”
of the
first
respective menu, SBM51 gateway.
Using the following parameters of the first respective menus M090 and CD_SB51, you can scale the
specified parameters for the first parameter set of the frequency inverter:
■
2241 “Q analog setpoint 2”
for the minimum frequency setpoint (parameter 204)
■
2242 “Q analog setpoint 3”
for the maximum frequency setpoint (parameter 205)
You can specify the scaling for the second parameter set of the frequency inverter using the same
parameters of the second respective menu, SBM51 gateway.
If no parameters are set, the local frequency inverter settings apply.
Entering negative frequency setpoint values leads to incorrect setpoint calculation.
!
NOTICE
The values of parameters
2241 “Q analog setpoint 2”
and
2242 “Q analog setpoint 3”
are only
sent to the FI when parameter 2241 is smaller than parameter 2242. Otherwise, FI malfunctions can
result which can only be reset by switching off the FI. The maximum FI setpoint can, due to the above-
mentioned condition, not be set to zero by parameter 2242. Value “0” can; however, be set manually
on the FI.
Always set the parameter for the maximum frequency setpoint before setting the parameter for the
minimum frequency setpoint.
The parameters for the minimum and maximum frequency setpoint values cannot be changed during
operation. Changes made are only active following motor stop.
Switch the parameter set using parameter
2240 “Q analog setpoint 1”
of the second respective
menu, SBM51 gateway (see Parameter 2240 “Q Analog Setpoint 1”, page 16).
The “remote” setpoint is only adopted by the SBM51/06 in automatic FI mode. When the FI is in
manual mode, the frequency inverter uses the “on-site setpoint”.
If necessary, the actual value is sent as the setpoint if no parameters are set (display “deleted”) in
parameter
2240 "Q analog setpoint 1"
. If a setpoint was set on-site on the frequency inverter, the
motor will continue to operate with the setpoints set on-site.
No setpoints are sent to the FI for actual value mode (parameter 2240 of the second respective menu)
. The FI runs with the on-site setpoints.
Function Following Interruption of the Danfoss Bus to the SBM51/06 (Using the VLT 6000 as
an Example)
Using the frequency inverter parameters “555 bus time interval” and “556 bus time interval”, you can
define which operating state the frequency inverter should adopt following bus interruption. “OFF” is
set as standard. The frequency inverter starts automatically as soon as the bus is ready for operation
again.
Refer to the Danfoss project planning documentation for information on settings for other types of FI.
SBM Behavior in the Event of an Error on the Switch Cabinet Bus (Diagnosis Function)
Resync functions are not yet supported by DDC3000 and DDC4000. Parameter
2240 “Q analog
setpoint 1”
(Can_Resync_Time) in Resync/Diag menu is used for the diagnosis function (see page
12).
■
When the Resync process is inactive on the DDC, the parameter 2240/31 [00] acts as a timeout
for SBM re-registration. FI operation is then interrupted.
■
Parameter
2245 “Q digital setpoint 3”
does not have any effect.
