Panasonic FP7 Series Command Reference Manual page 497

Operand Parameter
name
Process
[S2]
value (PV)
Set point
[S3]
value (SP)
Proportional
[S3+1]
gain (Kp)
Integral time
[S3+2]
(Ti)
Derivative
[S3+3]
Time (Td)
(Note 1) It is recommended to allocate the [S1] area to a non-hold type operation memory area (WR) where a
bit operation is available.
(Note 2) It is recommended to allocate the [S2] area to a non-hold type operation memory area.
(Note 3) It is recommended to allocate the [S3] through [S3+3] areas to a hold type operation memory area.
(Note 4) If the [S3+1] through [S3+3] areas are all "0" when the EZPID instruction is started up, operation is
continued with the settings where proportional gain (Kp) is 1, integral time (Ti) is 0, and derivative time
(Td) is 0.
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Setting of parameters [S4] to [S4+29]
Operand Parameter name Default
Manipulated
[S4]
value (MV)
[S4+1] Output lower limit K0
Output upper
[S4+2]
limit
100% output
[S4+3]
zone
WUME-FP7CPUPGR-12
10.12 EZPID (PID Operation: PWM Output Available)
Setting Setting method
range
Input the current value for process control amount using an analog
input unit, etc.
K -30000 to
K 30000
It is also possible to directly specify the input data area WXn of the
analog input unit.
Set a target value for process control amount.
K -30000 to
K 30000
Set the value using an instruction or an external device (e.g. display).
U1 to U9999
(0.1 to
999.9)
Specify parameters used for PID operation.
U0 to
Each parameter is obtained by multiplying the set point value by 0.1.
U30000
When auto-tuning is executed, the relevant data are stored upon its
(0 to 3000 s)
completion.
U0 to
U10000
(0 to 1000 s)
Setting range
K -10000 to K
K0
10000
K-10000
≤ Lower limit
< Upper limit
K10000
≤ K 10000
U0 U0 to U80
(0%) (0% to 80%)
Setting method
The result of PID operation is stored.
If PWM output is selected in bit 3 of [S1], calculation
is carried out in the range 0 to 10000, as the duty
ratio (0 to 100%) of PWM output.
If analog output is selected in bit 3 of [S1], the value
given by the following formula is stored.
(Output upper limit - Output lower limit) x Internal
calculated value / 10000 + Lower limit
Use the user program to convert the stored value
into the range of the analog output unit.
Specify the output value (MV) range. Values for the
specified range are output.
Specify the level of process value (PV), as
percentage to set point value, above which PID
control should be initiated. Until the specified
process value (PV) is reached, the manipulated
value (MV) is retained at 100%. If the process value
(PV) is smaller than the set point value (SP), this
shortens time until reaching the set point value (SP).
When the set point value is U80, the output level is
retained at 100% until the process value (PV)
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