.
The
IO_VOID_DATA_FLAG and bit 0 of the IO_STATUS_FLAGS are cleared when the IO_VOID_DATA_FLAG is read by the computer.
Discrete input 3 IO_OVERFLOW_ERROR
This discrete input is raised when an out of range condition occurs and the sensor data (see
IO_SENSOR1_DATA) is above the
maximum value specified by the calibration program or above 29,999. The typical maximum value is 4000 W/m².
When the
IO_OVERFLOW_ERROR is set, bit 1 in the IO_STATUS_FLAGS is also set.
The
IO_OVERFLOW_ERROR and bit 1 of the IO_STATUS_FLAGS are cleared when the IO_OVERFLOW_ERROR is read by the computer.
Discrete input 4 IO_UNDERFLOW_ERROR
This discrete input is raised when an underflow condition occurs and the sensor data (see
IO_SENSOR1_DATA) is below the
minimum value specified by the calibration program or below -29,999. The typical minimum value is -400 W/m².
When the
IO_UNDERFLOW_ERROR is set, bit 2 in the IO_STATUS_FLAGS is also set.
The
IO_UNDERFLOW_ERROR and bit 2 of the IO_STATUS_FLAGS are cleared when the IO_UNDERFLOW_ERROR is read by the
computer.
Discrete input 5 IO_ERROR_FLAG
The error flag is raised when there is a (fatal or correctable) hardware error or software error such as: ADC error, DAC error,
calibration error or when the update of the calibration data failed. When the
IO_ERROR_FLAG is raised the error code is copied
to the register
IO_ERROR_CODE (see register 26).
The error flag is cleared when a true condition is written to the coil:
‘IO_CLEAR_ERROR’. This has no effect when the error is fatal
or not resolvable such as a calibration error.
The error flag is always set after a power up, this is to indicate the power went off, or a restart occurred. The computer should
raise the
IO_CLEAR_ERROR in order to reset the error flag.
Discrete input 6 IO_ADC_ERROR
This flag is raised when the A/D converter responsible for the conversion of the analogue signals to digital signals detected a
failure (hard or software).
The ADC error flag is cleared when a true condition is written to the coil:
‘IO_CLEAR_ERROR’ and the error produced by the ADC,
is not fatal.
Discrete input 7 IO_DAC_ERROR
This flag is raised when the D/A converter responsible for the conversion of the digital signal to the analogue output signal
detected a failure (hard or software).
The DAC error flag is cleared when a true condition is written to the coil:
‘IO_CLEAR_ERROR’ and the error produced by the DAC,
is not fatal.
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