Hitachi HIDIC MICRO-EH Applications Manual page 85

Program example
X00007
X00008
X00009
CT17
•
An example of a word I/O being used as the set value for the circuit shown above.
R7E3
WR0017=4
X00007
X00008
X00009
CT17
Program description
[Time chart]
X00007
X00008
CL17
CT17
Set value
5
=4
4
3
2
Progress value
1
(TC17)
1] 2] 3]
6] The progress value will not exceed 65535 (decimal). Also, it will not be below 0.
7] When the counter clear (CL17) turns on, the progress value and the counter coil are cleared. The progress value is not
updated while the counter clear is on.
•
The clear is performed under the conditions set immediately before execution of the counter coil instruction.
•
Example using the word I/O as the set value
When RUN is commenced, the set value is set to word I/O.
Or, the word I/O for the set value is designated to store in the power failure memory.
CTU17
LD
4
OUT
CTD17
LD
OUT
CL17
LD
OUT
R107 LD
OUT
LD
[
WR0017=4
CTU17
]
WR0017
LD
CTD17
OUT
LD
OUT
CL17
LD
OUT
R107
LD
OUT
Ignored
65 535
65 534
5
4 4
3 3
2
4] 5] 6]
5-35
Chapter 5 Instruction Specifications
X00007
CTU17 4
X00008
CTD17
X00009
CL17
CT17
R107
R7E3
X00007
CTU17 WR0017
X00008
CTD17
X00009
CL17
CT17
R107
1] The progress value (count value) is
up-counted at the leading edge of
Ignored
X00007.
2] The counter coil (CT17) is turned on
when the progress value ≥ set value.
Ignored
3] When the up-coil and down-coil
startup conditions turn on
simultaneously, the progress value
does not change.
4] The progress value is down-counted
at the leading edge of X00008.
5] The counter coil turns off when set
value > progress value.
0
7]
6]