The difference between the setpoint and process value is the error before the deadband.
The setpoint and process value must exist in the same unit.
To suppress a small constant oscillation due to the manipulated variable quantization (for
example in pulse duration modulation with PULSEGEN) a deadband (DEADBAND) is
applied to the error. If DEADB_W = 0.0, the deadband is deactivated. The effective error
is indicated by the ER parameter.
The schematic below is the block diagram of the PID algorithm:
Forming the Error
Deadband (DEADB_W)
PID Algorithm
VIPA SPEED7
Standard
PID Control > FB 58 - TCONT_CP - Continuous Temperature Control
HB00 | OPL_SP7 | Operation list | en | 18-30 866
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