HBM PMX Manuel D'emploi page 96

96
13 Two-Level Controller (bangbang)
Function
Inputs
Outputs
Parameters
Default
Exception handling
If you are not sure how to use the feedback paths, we recommend using the
default settings.
Bang-bang control with feedback
- Input in0 setpoint value (setpoint)
- Input in1 actual value (feedback)
Digital output out0, (Digital Outputs menu, "Calculated
Channel Bit Mask")
- Hysteresis
- Feedback gain (Kr)
Common gain of both parallel PT1 feedback paths
- Feedback time constant 1 (Tr1 ) [seconds]
PT1 time constant of the negative feedback path
Tr1 < Tr2
- Feedback time constant 2 (Tr2 ) [seconds]
PT1 time constant of the positive feedback path
Tr1 < Tr2
Tr1, Tr2: 1e38 (feedback paths virtually switched off)
Kr: 0.0 (feedback paths switched off)
If at least one of the inputs is invalid (Invalid bit),
- the control output is deactivated (low)
- the values of the feedback paths are held
Hysteresis: 1.0
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