MAN1032-10-EN_EXL6_UserManual
March 12, 2020
84 | 191
CHAPTER 10: HIGH SPEED I/O
10.1 Overview
In addition to the compliment of simple analog and digital I/O, several of the EXL6 OCS I/O
modules support High Speed Counting (HSC) I/O functions and may also support Pulse Width
Modulation (PWM) Output functions (non-relay modules). The HSC functions include internal
timing, frequency, totalizing, pulse width/period and quadrature measurement. The PWM
functions include traditional PWM (with variable rate and duty cycle) and a stepper (limited
functionality) with variable acceleration and deceleration rates. To determine function
availability, refer to the associate
d model’s Specification/Installation sheet (Digital DC Input /
Output sections).
The OCS contains a Field-Programmable Gate Array (FPGA), which is an integrated
configurable circuit that allows the EXL6 to be programmed to have either two high-speed
counters or four high-speed counters. The EXL6 ships with two high-speed counters, but a
customer can contact Horner Technical Support to receive a file that will configure the unit to
have four. These modes are not supported simultaneously. Two counter mode supports
Quadrature mode and two stepper outputs, while four counter mode does not support
Quadrature mode and supports only one stepper output.
This chapter describes the operation of these high-level I/O functions. For configuration
details of these functions, refer to the