Cooling Unit - Siemens SINAMICS S120 Function Manual

Function modules

7.5 Cooling unit

7.5 Cooling unit
A cooling unit (RKA) is responsible for the cooling and the (non) conductivity in the de-
ionized water cooling circuit of a liquid-cooled power unit. The cooling unit is controlled and
monitored from a PLC that is part of the cooling unit.
The "cooling unit" function module described here is used as an interface between the
Control Unit and the external PLC as well as external sensors of the cooling unit. Signals for
control and messages between the PLC and the Control Unit can be exchanged via this
interface. The PLC communicates with the Control Unit via terminals and/or via a fieldbus
(e.g. PROFIBUS or PROFINET).
Features
● Automatically activated when using liquid-cooled power units
● Evaluation of an external sensor for leakage water
● Evaluation of an external sensor for liquid flow
● Evaluation of an external sensor for conductivity
● Monitoring the liquid intake temperature using external temperature sensors
● Monitoring the flow rating using internal temperature sensors
● Evaluation of signals transmitted from the PLC of the cooling unit
● Acknowledging cooling unit faults
Commissioning
You activate the "cooling unit" function module while configuring the associated power unit (a
power unit is a Motor Module or an Infeed Module):
1. When selecting the power unit, set the cooling type to "Liquid cooling".
2. Complete the configuration.
3. After configuration has been completed, the heat exchanger unit can be seen in the
power unit under "Functions").
4. Double-clicking "Cooling unit" opens the window for setting the monitoring functions.
In this window, BICO interconnections can be set for communication with the controller of
the cooling unit and the cooling water circuit monitoring.
You can check the current configuration in parameter r0108.28.
424
navigation window under "Power Unit > Functions" (also in the shortcut menu of the
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions