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5 BASIC USAGE
5.4 Using the Preset Function
5 - 10
The preset function rewrites the present counter value to any numeric value called the
preset value. The preset function can be used when starting the pulse count from the
preset value.
The preset function has two preset methods: preset using a sequence program and
preset using an external control signal.
(1) Preset using a sequence program
Preset is performed by turning the preset command {Y01(Y09)} ON using the
sequence program.
Count enable command
{Y04 (Y0C)}
Input pulse for counting
Buffer memory used for
setting the preset value
{Addresses 0
to 1
(20
H
H
Preset command
{Y01 (Y09)}
Buffer memory used for storing
the present value
{Addresses 2
to 3
(22
H
H
Number
Any numeric value is written in 32-bit binary format into the preset value setting
1)
buffer memory (Addresses 0
At the start (OFF to ON) of the preset command, the preset value in the preset
value setting buffer memory is preset in the present value storage buffer
2)
memory. Preset can be executed regardless of whether the count enable
command {Y04(Y0C)} is ON or OFF.
ON
OFF
0
to 21
)}
H
H
ON
OFF
0
1
2
to 23
)}
H
H
Description
to 1
H
H
1)
100
2)
to
65
66
67
100
(20
to 21
)) for the QD62 (E/D).
H
H
MELSEC-Q
101
102
103
104 105
5 - 10
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