Keyence launches new Visual PLC
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Keyence has launched a new Visual PLC that features industry's first built-in access window, an AC power supply model and an operator interface panel.
The access window is said to allow data to be checked on start-up as well as during modification or changeover, doing away with the need for a PC or handheld programmer.
It also includes functions such as key lock, error message and user message. An external operator interface linked by a modular cable has all the functions of the access window, plus a full-scale display and number of convenience functions such as a beep and display customisation.
Among a host of practical functions, the Visual PLC incorporates two-channel, two-phase, high-speed counters and high-speed counter comparators. This allows direct connection with a rotary encoder and counting input from the encoder. Consequently, it is said to be ideal for applications such as speed measurement and high-speed interval counting.
Another innovation is the incorporation of a positioning control function similar to that found in much more expensive units. With a single-axis stepper motor control independent of the high-speed counter, motors of up to 50kHz can be controlled.
Inputting the setting values into the specific data memories activates the positioning control stopper function. A frequency counter function measures the rotational frequency of a gear or rotary encoder without the need for complicated programming, while a specified frequency pulse output function controls motor speed.
