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2. Specifications
2.4. Counter Functions
R200
2MLF-HO2A, 2MLF-HD2A High Speed Counter Module User's Guide
37
May 2010
Honeywell
Table 13 – 1-Phase, 2-Input, 2-Multiplication Operation Mode
Up/Down count
classification
A-Phase input pulse rising
A-Phase input pulse falling
B-phase input pulse OFF
Up count
Up count
B-phase input pulse ON
Down count
Down count
Figure 5 – Up/Down Count Operation by B-Phase Input Signal
2.
2-Phase Input Mode
a)
2-phase, 1-multiplication operation mode
: The counter counts A-phase
pulse input at the rising edge.
−
If A-phase input pulse precedes B-phase input pulse, up count operation starts at
the rising edge of A-phase pulse input.
−
If B-phase input pulse precedes A-phase input pulse, down count operation starts
at the falling edge of A-phase pulse input.
Up/Down count
classification
A-Phase input pulse rising A-Phase input pulse falling
A-phase input pulse
precedes B
Up count
-
B-phase input pulse
precedes A
-
Down count