IAI America SCON-C - Manual (Page 160)

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Chapter 3 Pulse-train Input Mode
1. Overview
In this mode, the actuator can be controlled using the positioning control function (pulse-train input) of the host
controller (PLC).
1.1 Features
 Dedicated home return signal
IAI’s original stroke-end push type home return operation is supported in this mode.
When this function is used, home return can be performed automatically without having to program a
complex sequence or use an external sensor, etc.
 Brake control function
The electromagnetic brake power is supplied to the controller from a power supply different from the main
power. Since the controller controls the brake, there is no need to program a separate sequence. Also, the
electromagnetic brake can be released freely after the main power has been cut off.
 Torque limiting function
The torque can be limited (a desired limit can be set by a parameter) using an external signal. When the
torque reaches the specified level, a signal will be output. This function permits push & hold operation, press-
fit operation, etc.
 Feed-forward control function
With this function, response can be improved in certain situations such as when the load inertia ratio is high.
Increasing the parameter value will reduce the deviation (difference between the position command and the
position feedback), thereby improving response.
 Position-command primary filter function
Soft start and stop can be achieved even when the actuator is operated in the command-pulse input mode
where acceleration and deceleration are not considered.
 Feedback function
Position detection data is output using pulse trains (differential).
The current actuator position can be read in real time from the host controller.
* The controller is shipped with the feedback pulse output disabled. To use the feedback function, set user
parameter No. 68 to “0 (Enable).”
Caution: In the pulse train input mode, actuators of absolute specifications also operate as if actuators of
incremental specifications.