1769-UM006E-EN-P, Compact High-speed Counter Module User Manual
Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Compact I/O and/or MicroLogix 1500 or CompactLogix controllers.
Module-19 Counters
Asynchronous counters are slower than synchronous counters because of the delay in the transmission of pulses for one flip flop to another. With a synchronous counter, all the flip flops in the circuit
Technical note
This reference is intended for preliminary specialty-cable research. Compatibility, link budgets, fire performance, installation methods, test limits and applicable standards must be verified for the specific project.