LSIS XBE-DC08A, Руководство пользователя, Страница: 325 / 1284

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Chapter 6 Built-in PID Function
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6.4.2 PID Flags
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
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Table 6.8 K area flags for PID control
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