DAC output stage
The final processed setpoint is now transferred to the local DAC function block as an integer value and the electrical output is generated.
A case-by-case DAC error is output as PDO "AO Status" -> Error.
Notes:
- During "Power On" (Us, Up or both) or "Power Off", brief unregulated output (typically up to ±2 V for 200 ms) may occur at the output. If necessary, use an external signal isolator (relay) or switch to self-isolating analog output products.
- The output voltage in I mode can rise to > 20 V, e.g. in the event of a wire break
- The output diagnosis wire break/short circuit should be seen as an informative aid; it cannot cover all error states. It indicates an overload of the analog output.
- In the time between "Power On" (power supply is available, local µC has started up) and EtherCATState = OP, the AO channel outputs the analog output value that is specified in the watchdog as a substitute value.
Notice | |
Note on overload behavior In the event of an overcurrent, the channel interrupts the current flow periodically (so-called "auto-retry") and normal measuring operation is resumed as soon as the current falls below the limit threshold. The overcurrent event occurs at a signal current > approx. 40 mA for several seconds or also briefly at a significantly higher current, so both current and thermal monitoring takes place. |