Yaskawa MP940 - Manual (Page 125)

MP940 Functions
4.4.4 Pulse Count Method
4-32
4.4.4 Pulse Count Method
The methods shown below can be selected by means of fixed parameter 5 (PI Latch Detec-
tion).
Table 4.7 Types of Pulse Count Method
∗ 1. Pulse Count Methods
∗ 2. Multipliers
Measurement
Pulse count method
*1
Multiplier
*2
Remarks
Reversible
counter Sign method x1
x2
A/B method x1
x2
x4
Up/Down method x1
x2
• Sign Method
(Positive logic, 5-V differential input)
UP count with A-pulse inputs when B-pulse inputs are low.
DOWN count with A-pulse inputs when B-pulse inputs are high.
(Negative logic, 5-V differential input)
DOWN count with A-pulse inputs when B-pulse inputs are high.
UP count with A-pulse inputs when B-pulse inputs are low.
• A/B Method
(Positive/Negative logic)
UP count when A-pulse input phase lags B pulses.
DOWN count when A-pulse input phase leads B pulses
• UP/DOWN Method
(Positive/Negative logic)
A-pulse inputs: Incrementing pulses
B-pulse inputs: Decrementing pulses
(Positive logic)
x1:
x2:
x4: Count on A-pulse rising edge.
Count on A-pulse leading and trailing edges.
Count on A-pulse and B-pulse leading and trailing edges.
(Negative logic)
x1:
x2:
x4: Count on A-pulse trailing edge.
Count on A-pulse trailing and rising edges.
Count on A-pulse and B-pulse trailing and rising edges.