Specifications

Mode 30: Pulse Output

Purpose

The HSIO circuit in Mode 30 generates output pulse

trains suitable for open-loop control of a single-axis

motion positioning system. It generates pulse (stepper

increment) and direction signals which you can connect

to motor drive systems and perform various types of

motion control. Using Mode 30 Pulse Output, you can

select from three profile types detailed later in this

chapter:

• Trapezoidal – Accel Slope to Target Velocity to Decel Slope

• Registration – Velocity to Position Control on Interrupt (also used for home search moves)

• Velocity Control – Speed and Direction only

The HSIO circuit becomes a high-speed pulse generator (up to 7 kHz) in Mode 30. By

programming acceleration and deceleration values, position and velocity target values, the

HSIO function automatically calculates the entire motion profile. The figure below shows the

DL05 generating pulse and direction signals to the drive amplifier of a stepper positioning

system. The pulses accomplish the profile independently and without interruption to ladder

program execution in the CPU.

In the figure above, the DL05 generates pulse and

direction signals. Each pulse represents the smallest

increment of motion to the positioning system (such as

one step or micro-step to a stepper system).

Alternatively, the HSIO Pulse Output Mode may be

configured to deliver counter clock-wise (CCW) and

clock-wise (CW) pulse signals as shown to the right.

NOTE: The pulse output is designed for open loop stepper motor systems. This, plus its minimum

velocity of 40 pps make it unsuitable for servo motor control.

DL05 Micro PLC User Manual, 6th Edition, Rev. C

E–24

Appendix E: High-speed Input and Pulse Output Features

Trapezoidal Profile

Time

Decel

Velocity

Accel

Drive

Amplifier

Stepper

Motor

Pulse

Direction

DL05 Micro PLC

CCW Pulse

CW Pulse

Drive

Amplifier