Record Temperature Via Temperature-Dependent Resistances - Siemens SINAMICS G120 Original Instructions Manual

8.7.11

Record temperature via temperature-dependent resistances

Analog input AI 2
Via the DIP switch and parameter p0756[2], set the function of the analog input AI 2:
● p0756[2] = 2 or 3 → options for setting as current input
● p0756[2] = 6, 7 or 8 → options for setting as temperature sensor
Analog input AI 3
Analog input AI 3 is designed as a resistance input for a temperature sensor.
Setting options:
● p0756[3] = 6, 7 or 8 → options for setting as temperature sensor
Permissible temperature sensors
The temperature-dependent resistances Pt1000 or LG-Ni1000 are permissible as
temperature sensors. If you want to use the temperature signal as the actual value of the
temperature controller, set p2264 = 756.2 or 756.3.
Connect the temperature sensor as follows:
● AI 2 (terminals 50, 51)
● AI 3 (terminals 52, 53)
Measuring ranges and alarm thresholds for LG-Ni1000
The measuring range of the LG-Ni1000 sensor extends from -88 °C ... 165 °C. For values
outside this range, the inverter outputs alarm A03520 "Temperature sensor fault". The fault
type is displayed in r2124.
Measuring ranges and alarm thresholds for Pt1000
The measuring range of the Pt1000 sensor extends from -88 °C ... 240 °C. For values
outside this range, the inverter outputs alarm A03520 "Temperature sensor fault". The fault
type is displayed in r2124.
Fault values for temperature sensing via AI 2
● r2124 = 33: Wire break or sensor not connected
● r2124 = 34: Short-circuit
Fault values for temperature sensing via AI 3
● r2124 = 49: Wire break or sensor not connected
● r2124 = 50: Short-circuit
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
Setting functions
8.7 Application-specific functions
297