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6 Standard Function Blocks
6.5 CTUD(_E)
216
FXCPU Structured Programming Manual
(Application Functions)
Program example
In this program, the number of times the bit data stored in a device specified in turns ON from OFF is
counted up (added by "1"). When the value stored in a device specified in reaches the value specified in
, a device specified in turns ON.
At the same time, the number of times the bit data stored in a device specified in turns ON from OFF is
counted down (subtracted by "1"). When the value stored in a device specified in becomes "0", a device
specified in turns ON.
1) Function without EN/ENO(CTUD)
2) Function with EN/ENO(CTUD_E)
[Structured ladder]
[ST]
[Structured ladder]
[ST]
s1
d3
n d1
s2
d3
d2
CTUD
CTUD_Instance
g_bool1 CU QU
g_bool5
g_bool6
g_bool2 CD QD
g_int2
CV
g_bool3 RESET
g_bool4 LOAD
g_int1 PV
CTUD_Instance(CU:=g_bool1,CD:=g_bool2,RESET:=g_bool3,LOAD:=g_bool4,PV:=g_int1);
g_bool5:=CTUD_Instance.QU;
g_bool6:=CTUD_Instance.QD;
g_int2:=CTUD_Instance.CV;
CTUD_E
CTUD_E_Instance
EN ENO
QU
g_bool5
M10
M0
g_bool1 CU
CV
g_int2
g_bool4 LOAD
g_int1 PV
QD
g_bool6g_bool2 CD
g_bool3 RESET
CTUD_E_Instance(EN:=M0,CU:=g_bool1,CD:=g_bool2,RESET:=g_bool3,LOAD:=g_bool4,PV:=g_int1);
M10:=CTUD_E_Instance.ENO;
g_bool5:=CTUD_E_Instance.QU;
g_bool6:=CTUD_E_Instance.QD;
g_int2:=CTUD_E_Instance.CV;