Miscellaneous I/O
2.2.4 Other types of I/O
2.2.4.1 High Speed Counters
High Speed Counters receive pulses at a high rate of speed. These pulses may indicate the speed or position of a motor or other revolving or linear device. High Speed Counters are typically used with encoders and have other features such as inputs for homing signals and interrupts.
2.2.4.2 Decoders
Decoders receive analog rotary position information from resolvers to provide angular position and velocity for a rotating axis. The input is typically a sinusoidal waveform in the millivolt range. Like High Speed Counters, there are usually other input and output points available associated with the axis.
