PLC.PID

COMPONENT PID

ICON:

DESCRIPTION:
PID controller

PORTS:

NAME	TYPE	PARAMETERS	DIRECTION	CARDINALITY	DESCRIPTION
Kp_in	PORTS_LIB.analog_signal	(n = 1)	IN		Kp
MAN_AUTO	PORTS_LIB.bool_signal	(n = 1)	IN		Manual Mode = FALSE
Out	PORTS_LIB.analog_signal	(n = 1)	OUT		output
Outmax	PORTS_LIB.analog_signal	(n = 1)	IN		Min Output
Outmin	PORTS_LIB.analog_signal	(n = 1)	IN		Min Output
PV	PORTS_LIB.analog_signal	(n = 1)	IN		Process Value
PosR	PORTS_LIB.analog_signal	(n = 1)	IN		Position Requested when tracking mode activated
SP	PORTS_LIB.analog_signal	(n = 1)	IN		Set Point
TR_S	PORTS_LIB.bool_signal	(n = 1)	IN		Tracking mode set
Ti_in	PORTS_LIB.analog_signal	(n = 1)	IN		Ti (ms)

DATA:

NAME	TYPE	DEFAULT	RANGE	DESCRIPTION	UNITS
DEADBAND	REAL	0.1		Deadband value for taking into value new PID output
Kd	REAL	0		Filter for PID
Out_init	REAL	0		Initial Output
PMaxRan	REAL	1000		Max range of process value
PMinRan	REAL	0		Min range of process value
RA	BOOLEAN	FALSE		Reverse Action enabled
Td	REAL	0		Derivative time for PID [ms]

DECLS:

NAME	TYPE	INITIAL	RANGE	DESCRIPTION	UNITS
AtOutH	REAL			Max range of process value
AtOutL	REAL			Min range of output value
D_new	REAL
D_old	REAL
Kp	REAL			Gain for PID
OutD	REAL			output increment
OutO	REAL			Output Order after limitation
OutO_old	REAL			Previous Output Order after limitation
Out_old	REAL			Previous output
Outc	REAL			output before limitation
PVScaled	REAL			Process Value Scaled
SPScaled	REAL			Setpoint Value Scaled
TermD	REAL			Derivative Action
TermD_old	REAL			Previous Derivative Action
TermI	REAL			Integral Action
TermP	REAL			Proportional Action
Ti	REAL			Integration time for PID [ms]
dev	REAL			deviation : error PV-SP
dev_old	REAL			previous error PV-SP
dt	REAL			Time between 2 sample time in ms
frac	REAL			sampling
sense	REAL			control setting, Reverse action
start	REAL			starting time

FORMULATION:

NOTE: click [+] for accessing the source code file
(Document generated automatically with EcosimPro Version 5.0.6 Date: 2012:11:12 Time: 19:39:44)