Operating instructions

Functions
5.8 Protection functions
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA
119
Temperature sensing using a temperature sensor
Table 5- 39 Parameters to sense the temperature using a temperature sensor
Parameters Description
P0003 = 2 User access level
2: Extended
P0335 = 0 Specify the motor cooling
0: Self-ventilated* - with fan on the motor shaft (IC410* or IC411*) - (factory setting)
1: Forced ventilation* - with a separately driven fan (IC416*)
2: Self-ventilated* and inner cooling* (open-circuit air cooled)
3: Forced ventilated* and inner cooling* (open-circuit air cooled)
P0601 = 0 Specify the motor temperature sensor
0: No sensor (factory setting; → P0610)
1: PTC thermistor (→ P0604)
2: KTY84 (→ P0604)
4: ThermoClick sensor
P0604 = … Motor overtemperature alarm threshold (0°C … 220°C, factory setting 130°C)
Enter the alarm threshold for motor overtemperature protection. The shutdown
temperature threshold (alarm threshold + 10 %) is the value at which either the
inverter is shut down or I
max
is reduced (P0610).
P0610 = 2
This parameter is only visible, if P0003 = 3!
Response for motor overtemperature I
2
t
Defines the behavior as soon as the motor temperature reaches the alarm threshold.
0: No response, alarm only
1: Alarm and reduction of I
max
(reduces the output frequency)
2: Fault and shutdown (F0011) (factory setting)
P0640 Motor overload factor (entered in % referred to P0305: rated motor current)
*You will find detailed information on classifying the cooling technique in EN 60034-6
Temperature measurement without temperature sensor
This temperature calculation is only possible in the vector control mode (P1300 =
20/21/22/23) and functions by calculating a thermal motor model.
Table 5- 40 Parameter to sense the temperature without using a temperature sensor
Parameters Description
P0621 = 1 Motor temperature measurement after restarting
0: No identification (factory setting)
1: Temperature measurement after the first "motor ON"
2: Temperature measurement after each "motor ON".
P0622 = … Magnetization time of the motor for temperature measurement after starting (set
automatically as the result of motor data identification)
P0625 = 20 Ambient motor temperature
Enter the ambient motor temperature in°C at the instant that the motor data is
acquired (factory setting: 20°C).
The difference between the motor temperature and motor environment (P0625) must
lie within a tolerance range of approx. ± 5 °C.