Process control instructions
949
Part III FP Instructions
F356_Parameters_Hold_DUT
This data type is predefined in the FP Library and is used by the function F356_PID_PWM (see page 945).
This DUT specifies the control parameter (4 words). We recommend allocating the area used by this data type
to the hold-type operation memory.
Variable Comment Setting range
SP Set point value -30000–30000
Kp Stores the proportional gain Kp. After auto-tuning
has been completed, it is automatically set.
1–9999 (0.1–999.9)
Ti Stores the integral time Ti. This value is
automatically set after auto-tuning has been
completed.
0–30000 (0-3000s)
Td Stores the derivative time Td. This value is
automatically set after auto-tuning has been
completed.
0–10000 (0–1000s)
If the parameters Kp, Ti, and Td are all 0 when PID operation has started, they are initialized at 1, 1, and 0,
respectively, and operation continues.
If any of the parameters Kp, Ti, or Td is out of range when auto-tuning has started, they are initialized at 1, 1,
and 0, respectively, and auto-tuning continues.
F356_Parameters_NonHold_DUT
This data type is predefined in the FP Library and is used by the function F356_PID_PWM (see page 945).
This DUT specifies the manipulated value (MV) and the control parameters (4 words).
Variable Comment Default
value
Setting range
MV Stores the manipulated value (output
value)
0 -10000–10000
LowerLimit Sets the lower limit of the manipulated
value MV
0 min. -10000
UpperLimit Sets the upper limit of the manipulated
value MV
10000 max. 10000
PV_Band_WithFullOutput No PID control is performed and the
output is at 100% until the defined level
(0–80%) of the set point value has
been reached.
0 0–80%
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