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MELSEC-Q
5 BASIC USAGE
5 BASIC USAGE
This section explains the basic usage of the QD62(E/D).
5.1 Pulse Input and Counting Method
5.1.1 Types of pulse input methods
Six types of the pulse input methods are available. These include 1 phase multiple of 1,
1 phase multiple of 2, CW/CCW pulse input, 2 phase multiple of 1, 2 phase multiple of
2, and 2 phase multiple of 4. The following table shows the pulse input methods and
count timings.
Pulse input method Count timing
For addition count
A
B and
CH Down
count command
(Y3, YB)
Count at
φ
A rise ( )
φ
B and CH Down count command (Y3,
YB) are OFF
1-phase multiple of 1
For subtraction count
A
B or
CH Down
count command
(Y3, YB)
Count at
φ
A fall ( )
φ
B or CH Down count command (Y3,
YB) is ON
For addition count
A
B and
CH Down
count command
(Y3, YB)
Count at
φ
A rise ( ) and fall ( )
φ
B and CH Down count command (Y3,
YB) are OFF
1-phase multiple of 2
For subtraction count
A
B or
CH Down
count command
(Y3, YB)
Count at
φ
A rise ( ) and fall ( )
φ
B or CH Down count command (Y3,
YB) is ON
For addition count
A
B
Count at
φ
A rise ( )
φ
B is OFF
CW/CCW
For subtraction count
A
B
φ
A is OFF
Count at
φ
B rise (
)
For addition count
A
B
Count at
φ
A rise ( ) when
φ
B is OFF
2-phase multiple of 1
For subtraction count
A
B
Count at
φ
A fall ( ) when
φ
B is OFF
For addition count
A
B
Count at
φ
A rise ( ) when
φ
B is OFF
Count at
φ
A fall ( ) when
φ
B is ON
2-phase multiple of 2
For subtraction count
A
B
Count at
φ
A rise ( ) when
φ
B is ON
Count at
φ
A fall ( ) when
φ
B is OFF
For addition count
A
B
Count at
φ
A rise ( ) when
φ
B is OFF
Count at
φ
A fall ( ) when
φ
B is ON
Count at
φ
B rise ( ) when
φ
A is ON
Count at
φ
B fall ( ) when
φ
A is OFF
2-phase multiple of 4
For subtraction count
A
B
Count at
φ
A rise ( ) when
φ
B is ON
Count at
φ
A fall ( ) when
φ
B is OFF
Count at
φ
B rise ( ) when
φ
A is OFF
Count at
φ
B fall ( ) when
φ
A is ON
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