140
9 CREATING A HARDWARE LOGIC
9.2 Multi Function Counter Block
■
Pulse input modes and count timing
The following table shows the relationships between each pulse input mode and count timing.
"Pulse Input Mode"
Count timing
1-phase multiple of 1 (1-Phase Multiple of 1+, 1-
Phase Multiple of 1-)
At up count
The value is counted up at the rise (
↑
) of
Φ
A.
Φ
B is Low.
At down count
The value is counted down at the fall (
↓
) of
Φ
A.
Φ
B is High.
1-phase multiple of 2 (1-Phase Multiple of 2+, 1-
Phase Multiple of 2-)
At up count
The value is counted up at the rise (
↑
) and fall (
↓
) of
Φ
A.
Φ
B is Low.
At down count
The value is counted down at the rise (
↑
) and fall (
↓
)
of
Φ
A.
Φ
B is High.
CW/CCW (CW/CCW+, CW/CCW-)
At up count
The value is counted up at the rise (
↑
) of
Φ
A.
Φ
B is Low.
At down count
Φ
A is Low.
The value is counted down at the rise (
↑
) of
Φ
B.
2-phase multiple of 1 (2-Phase Multiple of 1+, 2-
Phase Multiple of 1-)
At up count
When
Φ
B is Low, the value is counted up at the rise
(
↑
) of
Φ
A.
At down count
When
Φ
B is Low, the value is counted down at the
fall (
↓
) of
Φ
A.
2-phase multiple of 2 (2-Phase Multiple of 2+, 2-
Phase Multiple of 2-)
At up count
When
Φ
B is Low, the value is counted up at the rise
(
↑
) of
Φ
A.
When
Φ
B is High, the value is counted up at the fall
(
↓
) of
Φ
A.
At down count
When
Φ
B is High, the value is counted down at the
rise (
↑
) of
Φ
A.
When
Φ
B is Low, the value is counted down at the
fall (
↓
) of
Φ
A.
2-phase multiple of 4 (2-Phase Multiple of 4+, 2-
Phase Multiple of 4-)
At up count
When
Φ
B is Low, the value is counted up at the rise
(
↑
) of
Φ
A.
When
Φ
A is High, the value is counted up at the rise
(
↑
) of
Φ
B.
When
Φ
B is High, the value is counted up at the fall
(
↓
) of
Φ
A.
When
Φ
A is Low, the value is counted up at the fall
(
↓
) of
Φ
B.
At down count
When
Φ
A is Low, the value is counted down at the
rise (
↑
) of
Φ
B.
When
Φ
B is High, the value is counted down at the
rise (
↑
) of
Φ
A.
When
Φ
A is High, the value is counted down at the
fall (
↓
) of
Φ
B.
When
Φ
B is Low, the value is counted down at the
fall (
↓
) of
Φ
A.
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Φ
A
Φ
B
Summary of Contents for MELSEC-L Series LD40PD01
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