一段PLC编程求大神详细解释
sy9: CALL "CONT_C" , DB41
COM_RST :=
MAN_ON :=
PVPER_ON:=TRUE
P_SEL :=
I_SEL :=
INT_HOLD:=
I_ITL_ON:=
D_SEL :=
CYCLE :=
SP_INT :=
PV_IN :=
PV_PER :=PIW256
MAN :=
GAIN :=
TI :=
TD :=
TM_LAG :=
DEADB_W :=
LMN_HLM :=
LMN_LLM :=
PV_FAC :=2.500000e-001
PV_OFF :=0.000000e+000
LMN_FAC :=1.000000e+000
LMN_OFF :=0.000000e+000
I_ITlvAL:=
DISV :=
LMN :=
LMN_PER :=
QLMN_HLM:=
QLMN_LLM:=
LMN_P :=
LMN_I :=
LMN_D :=
PV :=
ER :=
L DB41.DBD 92
L MD 24 //比值系数
*R
T DB42.DBD 6
CALL "CONT_C" , DB42
COM_RST :=
MAN_ON :=
PVPER_ON:=TRUE
P_SEL :=
I_SEL :=
INT_HOLD:=
I_ITL_ON:=
D_SEL :=
CYCLE :=
SP_INT :=
PV_IN :=
PV_PER :=PIW258
MAN :=
GAIN :=
TI :=
TD :=
TM_LAG :=
DEADB_W :=
LMN_HLM :=
LMN_LLM :=
PV_FAC :=2.500000e-001
PV_OFF :=0.000000e+000
LMN_FAC :=1.000000e+000
LMN_OFF :=0.000000e+000
I_ITlvAL:=
DISV :=
LMN :=
LMN_PER :=
QLMN_HLM:=
QLMN_LLM:=
LMN_P :=
LMN_I :=
LMN_D :=
PV :=
ER :=
NOP 0
AN DB41.DBX 0.1
JNB M118
L DB41.DBD 72
T DB41.DBD 16
L DB41.DBW 76
T PQW 256
JU M119
M118: L DB41.DBD 16
T DB41.DBD 72
L DB41.DBW 76
T PQW 256
JU M119
M119: AN DB42.DBX 0.1
JNB M021
L DB42.DBD 72
T DB42.DBD 16
L DB42.DBW 76
T PQW 258
JU M001
M021: L DB42.DBD 16
T DB42.DBD 72
L DB42.DBW 76
T PQW 258
JU M001
调用带参数DB41的子程序CONT_C