In automatic mode (i_xEn is TRUE and i_xManMode is FALSE), if the calculated process error is greater than 50% of the hysteresis in the positive direction, then q_xOput is TRUE.
q_xOput is reset only if the calculated process error goes below 50% of hysteresis in negative direction.
Process error = Setpoint value – Actual value.
If i_xManMode is TRUE regardless of the current inputs, the output is set to the state of i_xManVal.
This figure shows the timing diagram for the FB_2points function block.
This figure shows the transfer function for the FB_2points function block.
An invalid parameter at the function block inputs results in a detected error and the corresponding detected error ID is generated.
During the error detected state, the output value is set to zero. Detected error can be reset only through rising edge of i_xErrRst input.
The output q_xBusy is TRUE, whenever the function block is enabled and when there is no detected error.
