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Installation and operating instructions • Wilo-Control SC2.0-Booster • Ed.01/2023-09 17
Logic reversal of the collective fault signal (SSM)
The desired logic of the SSM can be set in the menu. It is possible to select between negat-
ive logic (falling edge in case of a fault = “fall”) or positive logic (rising edge in case of a
fault = “raise”).
• Set collective fault signal: Interaction/Communication→BMS→SBM, SSM
Function of the collective run signal (SBM)
The desired function of the SBM can be set in the menu. It is possible to select between
“Ready” (control device is ready for operation) and “Run” (at least one pump is running).
• Set collective run signal: Interaction/Communication→BMS→SBM, SSM
Fieldbus connection
The control device is prepared for connection via ModBus TCP as standard. Connection is
established via an Ethernet interface (electrical connection as per chapter 7.2.10).
The control device works as a Modbus slave.
Different parameters can be read and also changed to some extent via the Modbus inter-
face. See the appendix for an overview of individual parameters and a description of the
data types used.
• Set fieldbus connection: Interaction/Communication→BMS→ModbusTCP
Pipe filling
To avoid pressure peaks when filling empty or low-pressure pipes or to fill pipes as quickly
as possible, the pipe filling function (“tube filling function”) can be activated and con-
figured. It is possible to select the mode “One pump” or “All pumps”.
• Define pipe filling: Control settings→Additional settings→Tube filling function
If the pipe filling function is activated, the system operates according to the table below
following a restart (activation of mains voltage; external on; drives on) for a time that can
be set in the menu:
Device “One pump” mode “All pumps” mode
SCe One pump runs at a speed acc. to
“tube filling function” menu.
All pumps run at a speed acc. to
“tube filling function” menu.
SC 1 pump runs at fixed speed. All pumps run at fixed speed.
Table1: Operating modes for pipe filling
Fault-actuated switchover of multi-pump system
• Control devices with fixed speed pumps – SC: If the base-load pump has a fault, it is
switched off and one of the peak-load pumps is managed by the switchgear as a base-
load pump.
• Control devices in the SCe version: If the base-load pump malfunctions, it is switched
off and another pump assumes the control function.
A malfunction of a peak-load pump always leads to its shutdown and the activation of
another peak-load pump (possibly also the standby pump).
5.3.4 Motor protection
Excessive temperature protection
Motors with an WSK (thermal winding contact) signal an excessive winding temperature to
the control device by opening a bimetal strip contact. The connection of the WSK is carried
out according to the circuit diagram. Faults on motors that are equipped with a temper-
ature-dependent resistor (PTC) for excessive temperature protection can be detected us-
ing optional evaluation relays.
Overcurrent protection
Direct-starting motors are protected by motor protection switches with thermal and elec-
tromagnetic tripping devices. The trigger current must be set directly on the motor protec-
tion switch.
Motors with star-delta starting are protected by motor protection relays. The motor pro-
tection relays are installed directly on the motor protections. The trigger current must be
set and is 0.58× I
nom
with the star-delta starting of the pumps used.
Pump faults which reach the control device result in deactivation of the corresponding
pump and activation of the collective fault signal. After the cause of the fault has been rec-
tified, it is necessary to acknowledge the fault.
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