Siemens Sinamics s120 Commissioning Manual page 288

Commissioning
3.21 Temperature sensors for SINAMICS components
When using 2-wire sensors, to increase the measuring accuracy, the cable resistance can
be measured and saved. To do this, short-circuit the sensor cable as close as possible to the
sensor. The technique is described in the SINAMICS S120/150 List Manual in p4109[0...11].
The measured cable resistance is then taken into account when evaluating the temperature.
The cable resistance value is saved in p4110[0...11].
The TM150 can acquire the signals from KTY84, PTC, bimetallic NC contact, PT100 and
PT1000 temperature sensors and evaluate them. The fault and alarm thresholds of the
temperature values can be set from -99° C to 251° C. The temperature sensors are
connected at terminal strip X531 to X536 according to the table above. For further
information on the configuration and the connections, refer to the function diagrams 9625,
9626 and 9627 in the SINAMICS S120/S150 List Manual.
● p4100[0...11] sets the sensor type for the respective temperature channel.
● r4105[0...11] indicates the actual value of the temperature channel.
For switching temperature sensors, such as PTC and bimetallic NC contact, two limit
values are displayed symbolically:
– r4105[0...11] = -50°C: The actual temperature value is below the rated response
– r4105[0...11] = +250°C: The actual temperature value is above the rated response
Note
For PTC and bimetal NC contact the following applies:
What is shown in r4105[0...11] does not correspond to the actual temperature value.
● With p4108[0...5] = 0, you evaluate a sensor in a 2-wire system at a 4-wire connection at
terminals 1 and 2. Terminals 3 and 4 remain open.
● With p4108[0...5] = 2, you evaluate a sensor in a 3-wire system at a 4-wire connection at
terminals 3 and 4. The measuring cable is connected at terminal 1. You must short-circuit
terminals 2 and 4.
● With p4108[0...5] = 3, you evaluate a sensor in a 4-wire system at a 4-wire connection at
terminals 3 and 4. The measuring cable is connected at terminals 1 and 2.
You can find additional information in function diagram 9626 in the SINAMICS S120/S150
List Manual and in the SINAMICS S120 Function Manual Drive Functions in Chapter
"Thermal motor protection".
288
Value of p4100[0...11]
0
1
2
4
5
6
temperature.
temperature.
Temperature sensor
Evaluation disabled
PTC thermistor
KTY84
Bimetallic NC contact
PT100
PT1000
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
Temperature display range r4105[0...11]
-
-50° C or +250° C
-99° C to +250° C
-50° C or +250° C
-99° C to +250° C
-99° C to +250° C
STARTER Commissioning Manual