Specifications

Snap-in I/O Expansion Modules Hardware Configuration
42 VisiLogic: Getting Started
Snap-in I/O Expansion Modules
Configuring Snap-in I/O Modules
High-Speed Counters: Snap-in I/O Modules
Certain digital inputs on Snap-in I/O Modules are high-speed inputs that can
be used as a 32-bit high-speed counter of the following types:
High-Speed Counter
Uses the high-speed counter input alone, without
reset.
High-Speed Counter with Reload
Uses the High-Speed counter input
and an additional digital input as the counter's reset. You can select
whether Reload occurs at Active High, when the pulse is at the positive
level, or Active Low, when the pulse is at the negative level. Note that you
cannot set the Reload input to Frequency Measurement.
Frequency Measurer
Counts the number of pulses over the selected
period of time (sample rate): 100 mSec, 500 mSec, or 1000 mSec (1
second), expressing the number in Hertz. For example, 155 pulses
counted over 500 mSec is equal to 310Hz.
Shaft Encoder
Note that pnp shaft-encoder devices may be used.