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6 Standard Function Blocks
6.3 CTU(_E)
210
FXCPU Structured Programming Manual
(Application Functions)
6.3 CTU(_E)
Outline
This function block counts up the number of times of rising of a signal.
1. Format
*1. Refer to caution points.
2. Set data
In explanation of functions, I/O variables inside ( ) are described.
Explanation of function and operation
This function block counts up (adds "1" to) the value stored in a device specified in when a device
specified in turns ON.
When the count value reaches a value specified in , a device specified in turns ON.
When a device specified in turns ON, this function block turns OFF a device specified in , and
resets the count value of a device specified in .
Cautions
1) Use the function having "_E" in its name to connect a bus.
2) Expression of function blocks in each language
*1. Set the instance when using a function block.
Describe the instance name when programming a function block.
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S
FX
U
/FX
2C
FX0N FX0(S)
Function name
Expression in each language
Structured ladder ST
CTU
CTU(CU,RESET,PV); *1
Example:
Instance name(CU:=M0,
RESET=M10, PV=D0);
M20:=Instance name.Q;
D10:=Instance name.CV;
CTU_E
CTU_E(EN,CU,RESET,PV); *1
Example:
Instance name(EN=X000,
CU:=M0, RESET=M10, PV=D0);
M20:=Instance name.Q;
D10:=Instance name.CV;
Variable Description Data type
Input
variable
EN Execution condition Bit
CU ( )
Count source signal Bit
RESET ( )
Reset input signal Bit
PV ( )
Counter set value Word [signed]
Output
variable
ENO Execution status Bit
Q()
Count-up output signal Bit
CV ( )
Number of times of rising Word [signed]
CTU
Q
M20CUM0
CV D10RESETM10
PVD0
Instance name
CTU_E
EN ENO
Q
M20
X000
CUM0
CV D10RESETM10
PVD0
Instance name
s1
s2
n
d1
d2
d2
s1
n d1
s2 d1
d2