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Chapter 5 Instruction Specifications
5-133
Item number FUN instructions-9 Name High-speed counter current value reading
Ladder format Condition code
Processing time (µs)
Remark
R7F4 R7F3 R7F2 R7F1 R7F0
Average Maximum
FUN 144 (s) DER ERR SD V C
↕
zzzz
Instruction format Number of steps
132
Condition Steps
FUN 144 (s) — 3
Bit Word Double word
Usable I/O
XY
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM
Constant
Other
s
Argument (counter
number)
{
s+1
Argument
(Current value storage
area)
{
Function
Counter number: H01 to H04
**: Disable area
• This function reads the count value of the specified counter number and writes it to the current value storage area.
Notes
• If a value other than H01 to H04 is specified for the counter number, DER will be set to “1” and no processing will be
performed.
• If the specified counter number is set to a function other than a corresponding external I/O counter (single-phase counter,
two-phase counter), DER will be set to “1”and no processing will be performed.
• Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
• If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
• This instruction is only used to read the count value. Other counter settings will not be changed and it will not affect the
count operation.
• The execution of this instruction will not change WRF07A to WRF07D (strobe area) and WRF056 (strobe complete flag).
• If the range for S exceeds the valid range of the I/O, DER will be set to “1” and no processing will be performed.
Program example
R4
LD R4
AND DIF4
[
WR40 = H100
FUN 144 ( WR40 )
]
LD (WR41 < 2000)
OUT R144
DIF4
WR40 = H0100
FUN 144 (WR40)
WR41
<
2000
R144
Program description
• Load the count value of the counter No. 1 to WR41.
If the count value of the counter No. 1 is less than 2000, R144 is turned on.
S
Counter number * *
15 8 7 0
S + 1
Current value storage area
FUN 144 (s)