Siemens Sinamics S120 Function Manual page 332

Function modules
7.5 Cooling unit
Description
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).
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, in the navigation window under "Power
4. Double-click on "Cooling unit" opens the window for setting the monitoring functions.
Function diagrams (see SINAMICS S120/S150 List Manual)
● 9794 Cooling unit, control and feedback signals
● 9795 Cooling unit sequence control
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● r0046.29 Missing enable signals - cooling unit ready missing
● r0108.28 drive object function module cooling unit
● p0192.06 Power unit firmware properties - water cooling
● r0204.06 Power unit hardware properties - water cooling
● p0260 Cooling unit, starting time 1
● p0261 Cooling unit, starting time 2
● p0262 Cooling unit fault conductivity delay time
● p0263 Cooling unit fault water flow delay time
● p0264 Cooling unit, run-on time
● r0265 BO: Cooling unit control word
● p0266[0...7] BI: Cooling unit signal source feedback signals
● r0267 BO: Cooling unit status word display
330
Unit>>Functions", the heat exchanger unit can be seen (also in the shortcut menu of the
power unit under "Functions").
In this window, BICO interconnections can be set for communication with the control of
the cooling unit and the cooling water circuit monitoring.
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions