Ezpid (Pid Operation: Pwm Output Available) - Panasonic FP7 Series Command Reference Manual

10.12 EZPID (PID Operation: PWM Output Available)

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Ladder diagram
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List of operands
Operand Description
S1 1-word area for setting control data that determine methods for auto-tuning and output
S2 1-word area for inputting the process value (PV)
4-word area for setting the set point value (SV), proportional gain (Kp), integral time (Ti), and
S3
derivative time (Td).
30-word area comprising the following:
S4
Storage area for the manipulated value (MV), control interval (Ts), control mode, setting area for
parameters related to auto-tuning, and operation work area
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Devices that can be specified (indicated by ●)
Operan
d
W W
X Y
S1 ● ●
S2 ● ●
S3 ● ●
S4 ● ●
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Outline of operation
● PID operation is carried out to retain the process value (PV) stored in [S+2], in consistency
with the set point value (SP) specified by [S3].
● The operation result is stored, as a manipulated value (MV), in the area specified by [S4]. If
an OUT instruction is described immediately after this instruction, PWM output (ON-OFF
output) can be gained, proportionate to the manipulated value.
● Set the parameters used for PID operation (proportional gain, integral time, and derivative
time) to [S3+1] to [S3+3]. The auto-tuning function for automatically calculating these values
is also available.
● To change the method for PID operation (derivative-first operation/proportional-plus-
derivative-first operation, reverse operation/forward operation) or the control interval Ts, etc.,
set them to the area [S4] to [S4+9].
WUME-FP7CPUPGR-12
10.12 EZPID (PID Operation: PWM Output Available)
16-Bit device:
W W W S D L
R L S D T D
● ● ● ●
● ● ● ● ● ●
● ● ● ●
● ● ● ●
32-Bit
device:
TS TE
U W
WI IX
C C
M O
S E
Real St
Integer numbe rin
r g
D
K H SF " "
Ｕ
F
Index
modifie
r
10-45