LSIS XBE-DC08A, Руководство пользователя, Страница: 189 / 1284

B
asi
s
Chapter 4 Built-in High-speed Counter Function
4-5
4.1.3 Functions of High-speed Counter
(1) Counter mode
(a) High Speed counter function can count High Speed pulses which can not be processed by CPU module’s
counter instructions (CTU, CTD, CTUD, etc.), up to binary value of 32 bits (-2,147,483,648 ~ 2,147,483,647).
(b) Available input is 1-phase input, 2-phase input and CW/ CCW input.
(c) Count increasing/decreasing methods are as follows;
• For 1-phase input: a) Increasing/decreasing count operation by program setting
b) Increasing/decreasing count operation by B-phase input signal
• For 2-phase input: setting by difference in phase between A-phase and B-phase
• For CW/CCW input: Increasing operation if B-phase is LOW with A-phase input, and Decreasing operation if A-
phase is LOW with B-phase input.
(d) Auxiliary modes are as follows;
• Latch counter
• Count function about the number of revolution per unit time
• Frequency measure function
• Count prohibited function
(e) Pulse input mode
1) 1 phase count mode
a) Increasing/decreasing count operation by program setting
• 1-phase 1-input 1-multiplication operation mode
A-phase input pulse counts at rising and increasing/decreasing will be decided by the applicable program.
Increasing/Decreasing classification
A-phase input pulse
rising
A-phase input pulse
falling
Increasing/decreasing count setting signal Off Increasing count -
Increasing/decreasing count setting signal On Decreasing count -
• Operation example
Down Up Up
Up/Down
count setting
A phase input
pulse
Count 10 11 12
13
12 11
12
Off
On
Off