1 About the SmartAXIS
1-4 SmartAXIS Touch User's Manual
● Pulse I/O Functions
■ High-speed Counter
This function counts high-speed pulse inputs that cannot be measured in normal ladder program or FBD program
processing.
Use this function for applications such as positioning control with a rotary encoder or motor control. The Touch can
use singlephase high-speed counters and two-phase high-speed counters. A maximum of four single-phase high-
speed counters and a maximum of one two-phase high-speed counters can be used simultaneously.
Example: Controlling a motor by counting two-phase pulse input with a high-speed counter
■ Frequency Measurement
This function measures the frequency of pulses input to an input terminal. The frequencies of a maximum of one
input can be measured.
●
Convenient Functions
■ Calendar/Clock
The Touch features a real-time clock on-board. Using the calendar and clock function, the Touch can operate
according to the current date and time. These functions can be used to control time schedule for lighting or air
conditioning equipments.
■ Security function
The project in the Touch can be protected against reading and/or writing by including a password in the project. This
function is effective for security of projects.
■ “Keep” or “Clear” Designation of Touch Data
Internal relays, shift register bits, counter current values, and data register values of the control devices can be
designated to be kept or cleared when the Touch is powered down. All or a specified range of these devices can be
designated as keep or clear types.
■ RUN/STOP Selection at Startup when “Keep” Data is Broken
When data to be kept such as “keep” designated counter values are broken while the Touch is powered down, the
user can select whether the ladder program starts to run or not to prevent undesirable operation at the next startup.
■ Log Data
The function allows values of devices to be logged under specified sampling conditions. The sampled values of
devices are saved in internal memory along with the time of sampling.
■ Timer Interrupt
The timer interrupt can be used to call an interrupt program at a predetermined interval of time without being
affected by the scan time. This can only be used when ladder program is selected as the programming language for
control function.
■ PID control
PID control performs temperature control and other types of control using a PID (proportional, integral, derivative)
arithmetic algorithm. PID control can be performed by automatically calculating the optimal PID value using the auto
tuning function.
This can only be used when ladder program is selected as the programming language for control function.
Rotary
encoder
Two-phase pulses
High-speed pulse input
Touch
Pulse motor
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