5.11 Standard Counter Function Blocks; Up Counter - Mitsubishi Electric MELSEC-Q/L Programming Manual

5.11
Standard Counter Function Blocks

Up counter

CTU(_E)
High
Basic Process
Redundant Universal
performance
Structured ladder/FBD
CTU_E
EN ENO
s1 d1
s2 d2
n
The following function(s) can go in the dotted squares.
CTU, CTU_E
■Argument
Input/output Name
argument
Input argument EN
s1(CU)
s2(RESET)
n(PV)
Output argument ENO
d1(Q)
d2(CV)
Processing details
■Operation processing
• Counts (d2) when (s1) is turned ON. When the count value (d2) reaches the value input to n, (d1) turns ON. When (s2) is
turned ON, (d1) turns OFF and count value (d2) is reset.
• Valid setting range for n is -32768 to 32767. However, if 0 or less is set, (d1) is turned on regardless of the count value of
(d2).
■Operation result
• Function without EN/ENO
An operation is executed and the operation value is output from (d1) and (d2).
[Timing chart]
ON ON
s1
OFF OFF OFF
s2
OFF
d1
OFF
d2 0 1
Counts d2 up when s1 = ON.
LCPU
ST
ENO:= (EN, s1, s2, n, d1, d2);
CTU_E
Description
Executing condition (TRUE: Execution, FALSE:
Stop)
Count signal input
Count reset
Maximum count value
Execution result (TRUE: Normal, FALSE: Error or
stop)
Count match output
Count value
ON ON ON
ON
2 3
Data type
Bit
Bit
Bit
Word (signed)
Bit
Bit
Word (signed)
ON ON ON
OFF OFF
ON
OFF
OFF
0 1
Clears d2 0 when s2 = ON.

5.11 Standard Counter Function Blocks

2
5 APPLICATION FUNCTIONS
5
181