LSIS XBF-AH04A - Page 567

XGB Analog edition manual
15 - 18
15.2.4 PID flag
The parameter set by the XGB series built-in PID control function is saved into the flash memory of
the basic unit. Such parameters are moved to K area for the built-in PID function as soon as PLC
turns from STOP to RUN mode. PID control operation by PID control command is executed through K
area data for PID functions. Therefore, if a user changes the value in the trend monitor window or
variable monitor window during operation, PID operation is executed by the changed value. At the
moment, if PLC is changed to RUN again after being changed to STOP, it loads the parameters in
flash memory to K area, so the data changed in K area is lost. Thus, to keep applying the parameters
adjusted in K area, it is necessary to write the parameter set in K area to flash memory by using WRT
command. (In case of IEC, APM_WRT)
(1) PID Flag Configuration
K area flags for XGB series built-in PID control function are summarized in the below table.
Loop
K area
IEC type
Symbol
Data
type
Default
Description
Common
K12000~F
%KX19200~15
_PID_MAN
Bit
Auto
PID output designation(0:auto,
1:manual)
K12010~F
%KX19216~31
_PID_PAUSE
Bit
RUN
PID pause (0:RUN, 1:pause)
K12020~F
%KX19232~47
_PID_REV
Bit
Forward
Control direction(0:forward,
1:reverse) operation control
K12030~F
%KX19248~63
_PID_AW2D
Bit
Disabled
Dual integral accumulation
prevention(0:enabled, 1:disabled)
K12040~F
%KX19264~79
_PID_REM_RUN
Bit
Disabled
PID remote operation(0:disabled,
1:enabled)
K1205~K1207
%KW1205~%KW1207
Reserved
WORD
-
Reserved area
K12080~F
%KX19328~43
_PID_PWM_EN
Bit
Disabled
PWM output enable(0:disabled,
1:enabled)
K12090~F
%KX19344~59
_PID_STD
Bit
-
PID operation indication(0:stop,
1:run)
K12100~F
%KX19360~75
_PID_ALARM
Bit
-
PID warning(0:normal, 1:warning)
K12110~F
%KX19376~91
_PID_ERROR
Bit
-
PID error(0:normal, 1:error)
K1212~K1215
%KW1212~%KW1215
Reserved
WORD
-
Reserved
Loop 0
K1216
%KW1216
_PID00_SV
INT
0
PID SV
K1217
%KW1217
_PID00_T_s
WORD
100
PID operation cycle[0.1ms]
K1218
%KD609
_PID00_K_p
REAL
1
PID proportional constant
K1220
%KD610
_PID00_T_i
REAL
0
PID integral time[sec]
K1222
%KD611
_PID00_T_d
REAL
0
PID differential time[sec]
K1224
%KW1224
_PID00_d_PV_max
WORD
0
PID PV change limit
K1225
%KW1225
_PID00_d_MV_max
WORD
0
PID MV change limit
K1226
%KW1226
_PID00_MV_max
INT
4000
PID MV max. value limit
K1227
%KW1227
_PID00_MV_min
INT
0
PID MV min. value limit
K1228
%KW1228
_PID00_MV_man
INT
0
PID manual output
K1229
%KW1229
_PID00_PV
INT
-
PID PV
< Table 15.8 K area flags for PID control >