Panic Mode

If the power supply detects a short circuit or other fault condition, it will enter panic mode. In panic mode, the power supply will turn off the HV rail and all output channels. The power supply will remain in panic mode and ignore commands until panic mode is cleared.

While in panic mode, the green HV OFF indicator will illuminate, and the red HV ON indicator will blink as shown below.

Causes of Panic Mode

The power supply will enter panic mode under the following conditions:

• A short circuit is detected on any channel.
• The power supply is turned on with HV enabled.
• The power supply exceeds its operational limits.
• The internal CPU overheats.
• The power supply is commanded to enter panic mode.

To check why the device is in panic mode, run:

import ardi
psu = ardi.autoconnect()
psu.whypanic()

Clearing Panic Mode

Panic mode is cleared by toggling the HV off and then back on again. Please check for failed actuators before turning the HV back on. If all actuators are intact, please check the load and frequency to ensure they are within the operational limits of the device.

Forcing Panic Mode

If for some reason you wish to force the device into panic mode, you can do so with the following command:

psu.panic()

If you simply wish to zero all outputs, instead please use:

psu.zero()

Operational Limits

Panic mode can be triggered by the device falling out of nominal operating conditions, likely caused by requesting a higher frequency to a larger load than the device can reliably drive. If panic mode is triggered but there is no short, please consult the max frequency/capacitance curve shown on the specifications page. If your load and frequency are within the curve, please contact Artimus Robotics for support.