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Publication 1746-5.16
High-Speed Counter Module Overview
The High-Speed Counter Module, Catalog Number 1746-HSCE is an SLC 500
family compatible device. It can be used with SLC 5/02 (and above)
processors.
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The module’s bidirectional counting ability allows it to detect movement in
either direction. In addition, x2 and x4 counting modes are provided to fully use
the capabilities of high-resolution quadrature encoders.
High-speed inputs from quadrature encoders and various high-speed switches are
supported. Accepting input pulse frequencies of up to 50k Hz allows precise
control of fast motions.
In addition to providing an Accumulated Counter, the module provides a Rate
Counter to determine Rate Measurement by indicating the pulse input frequency
in Hz. (Refer to the block diagram on the following page.) The Rate
Measurement is determined by accumulating input pulses over a fixed period of
time. You set the Rate Period to best match your application requirements.
Background Rate calculation is provided in Sequencer and Range Modes. This
operation accepts input rates up to 32,767 Hz. The dynamically configurable
Rate Period ranges from 10 ms to 2.55 seconds.
The module’s four current sink (open collector) outputs can be controlled from
one of two sources:
• the user program
• the module
Control of the counter reset is configured through user-set parameters. The
counter can be reset from any combination of the Z input, Limit Switch input, or
Soft Reset control bits.
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The 1746-HSCE High-Speed Counter Module is not compatible with the 1747-ASB Remote I/O
Adapter Module.