Runtime error
Original instructions
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Status word
The bits of the status words have the following meaning:
Bit
Description
Bit 0 = 1
Error in a floating point value calculation
Bit 1 = 1
Invalid value recorded at one of the floating point inputs
Bit 2 = 1
Division by zero with calculation in floating point values
Bit 3 = 1
Capacity overflow during floating point value calculation
Bit 4 = 1
The parameter perf is outside the [0.1] range: the function block uses the value 0 or 1 for calculations.
Bit 7 = 1
The thresholds pv_inf and pv_sup of the controller to be set are identical
Bit 8 = 1
The PARA_C output is not connected to the parameters of an autotunable controller
Bit 9 = 1
Autotuning failed
Bit 10 = 1
The last autotune was successful
For the list of other possible floating point error codes, see Common Floating Point Errors.
Error message
This error is displayed when a non-floating point has been recorded at an input, when a problem occurs during a calculation with floating points or when the thresholds pv_inf and pv_sup of the controller are identical. In this case, all the outputs of the function block remain unchanged.
NOTE: For a list of all block error codes and values, see Controller.
Warning
A warning is issued, if the parameter perf is outside the [0.1] range. In this case, the block can use either the value 0 or 1 for the purpose of calculations.