ShuntThermalTimeConstant Parameter
Default Value: 0
Minimum Value: 0
Maximum Value: None
Units: time seconds
Type: float
HARDWARE: This parameter applies only to the iXC6e, XC6e, and the -SX1 options of the iXC4, XC4, iXC4e, and XC4e.
The ShuntThermalTimeConstant parameter represents the thermal time constant of the shunt resistor. It is used to calculate the temperature of the shunt resistor. If the shunt resistor temperature is more than 200 °C, an Amplifier Temperature Fault occurs. The calculation of the shunt resistor temperature is an open loop estimation. Therefore, the ShuntThermalTimeConstant must be set correctly for shunt temperature monitoring to operate correctly.
For the internal iXC6e or XC6e shunt resistor, you should set the ShuntThermalTimeConstant parameter to 200 seconds.
If you are using an external shunt resistor, you must experiment to get the value for this parameter. Accurate calculation of the shunt resistor temperature depends on the specific resistor and the application details.
To disable shunt temperature monitoring, set the ShuntNormalizedTemperatureFactor Parameter or the ShuntThermalTimeConstant parameter to 0.
