ADLINK Technology PCI-8254, User Manual

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66 Motion Control Theory
4.1 Motion Control Mode and Interface Overview
This section describes basic setups of "PCI-8254" and "PCI-8258"
before doing motion control and fundamental concepts of its core
operations.
4.1.1 Motion Control Interface
4.1.1.1 Control Mode and Output Interface
You may use the MotionCreatorPro2 application program to set
up these two output interface and save your desired setting in
non-volatile memory, the so-called ROM, of the controller for
automatic loading when the controller power on. You may use API
listed below to retrieve current settings to ensure their correctness.
APS_get_eep_curr_drv_ctrl_mode ()
4.1.1.2 Pulse Type
You can use this control mode to control stepper motor or set it to
P control mode to control servo motor with pulse format signal
input. The output interface of controller is OUT / DIR [1..8] pins.
(Please refer Chapter 3 for detail.)
This is the so called open-loop or semi closed-loop control model
where the upper controller output position command in digital
pulse format signal to lower stepper motor or servo motor to form
a close-loop control in servo drive. In this mode, number of pulses
indicates actual distance traveled by the machine (vary with the
relation between mechanical shift and pulse) while the pulse
output frequency indicates speed of the machine traveling at (in
unit of pulse per second, PPS).