A5.4.2 Pid Control Algorithm Parameters; A5.5 Control Output Action; A5.5.1 Velocity Type; A5.6 Direction Of Control Action - YOKOGAWA Admag TI Series User Manual

A5.4.2 PID Control Algorithm Parameters
The table below shows setting parameters for the PID control algorithm.
Parameter
Proportional
GAIN
gain
RESET Integral time
Derivative
RATE
time
A5.5 Control Output Action
The control output action is the function to convert the change in operation output (ΔMVn) at
each control period to the actual operation output value (OUT).
The control output action for the PID block of EJX supports the velocity-type.
A5.5.1 Velocity Type
The PID block determines the value of the new control output (OUT) by adding the change in
control output calculated in the current control period (ΔMVn) to the value read back from the
output destination (BKCAL_IN).
The calculation expression for the control output action of speed type is shown below.
ΔMVn'= ΔMVn*(OUT_SCALE. EU100 - OUT_SCALE. EU_0) / (PV_SCALE.
EU_100 - PV_SCALE. EU_0)
(Direct Acting is False in CONTROL_OPTS)
OUT = BKCAL_IN - ΔMVn'
(Direct Acting is True in CONTROL_OPTS)
OUT = BKCAL_IN + ΔMVn'
A5.6 Direction of Control Action
The operating direction of the output is switched for the increase or decrease of the deviation.
The direction is specified with Direct Acting of CONTROL_OPTS.
Value of Direct
Acting
True
False
Description Valid Range
0.05 to 20
0.1 to 10000
(seconds)
0 to infinity
(seconds)
The output increases when the measured value (PV) is
greater than the setpoint (SP).
The output decreases when the measured value (PV) is
greater than the setpoint (SP).
<Appendix 5. PID Block>
Description
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