Overtemperature protection
The overtemperature protection disables the chopper if one of the following cases occurs:
- The temperature of the braking resistor exceeds the limit value “I2T error level”.
- The internal temperature of the box exceeds 80 °C. (from firmware 03)
In both cases, the bit “I2T error” in the process data is also set to 1.
The chopper is re-enabled when the temperature of the braking resistor falls below the limit value “I2T warn level” or the internal temperature of the box falls below 70 °C. (Hysteresis)
Parameter
Index | Name | Description | Data type | Flags | Default |
|---|---|---|---|---|---|
8000:18 | I2T warn level | If the temperature of the braking resistor exceeds this value, the bit “I2T warning” is set to TRUE. Unit: °C. | UINT16 | RW | 100dec |
8000:19 | I2T error level | If the temperature of the braking resistor exceeds this value, the chopper is disabled. The bit “I2T error” is set to TRUE. Unit: °C. | UINT16 | RW | 120dec |
Overtemperature warning
The bit “I2T warning” in the process data is set to 1 if one of the following cases occurs:
- The temperature of the braking resistor exceeds the limit value “I2T warn level”.
- The internal temperature of the box exceeds 70 °C. (from firmware 03)
However, the chopper is not yet disabled. Therefore, you can still react to the warning. As soon as the value falls below the corresponding threshold again, the bit is reset to 0.
Disabling the overtemperature shutdown
You can disable the overtemperature shutdown of the chopper by setting parameter 8000:01 “Disable chopper on overtemperature” to FALSE.