PLµS Controllers are Fast!
As the system in
Figure 1
shows, the PLµS monitors the pro-
duction line every 300 to 500 µsec, approximately 100 times
faster than an average PLC with its more extensive program-
ming. Although the PLC does interface directly with the produc-
tion line, the functions it controls are lower speed, and deals
more with the logic functions necessary for machine control.
For high speed, critical functions such as label-to-product reg-
istration, the PLµS provides faster control and improved preci-
sion, reducing scrap and rejects.
PLµS Controllers have Built-In DC Inputs & Outputs!
Using transistor outputs, the PLµS
can signal changes to the
PLC within 300 to 500 µsec (as fast as 40 µsec on special mod-
els); much faster than the serial communications speed of ap-
proximately 50 msec. When product sensors send a signal to
the DC input of the PLµS, the PLµS responds to that signal
quickly.
PLµS Controllers have Serial Communications!
For product changeovers, the PLC can send commands and
operating parameters to the PLµS controller to change setpoint
programs. This eliminates the need for an operator to manually
change programs through the PLµS keyboard.
PLµS Controllers Save PLC Memory!
The PLµS controller can store many programs containing vari-
ous setpoints for the production line. The PLC need only select
the correct program, and the PLµS will do the rest.
PLµS Controllers Simplify PLC Programming!
By handling complex functions like speed compensation, timed
outputs, and sensor gating, the PLµS controller relieves a pro-
grammer of having to write complicated PLC control program-
ming from scratch. The PLC software can simply exchange
process variables and control data with the PLµS controller,
which handles direct high speed machine control through its
own dedicated software.
PLµS Controllers Simplify Operator Interface Design!
Many production lines require an operator to select product
sizes or configurations through a keyboard. The 1/4 DIN key-
pad/display of the PS-6000 can be mounted near the produc-
tion machinery, giving an operator easy access to critical con-
trol functions. The keypad transmits these changes back
through the PLµS controller to the PLC, eliminating the need
for a PLC system designer to supply custom operator interface
software and hardware for PLS functions.
Electro Cam Corp. has Systems Experience!
Our standard PLµS controllers feature extensive capabilities
for integration into larger control systems, PLC based or other-
wise. We can supply IBM-PC compatible PLuSNet software to
facilitate communications between our controllers and a host
computer. In addition, we can supply controllers with custom
features such as shift-register capability, or the ability to func-
tion in non-rotary environments. For information on our sys-
tems capabilities, please call our toll free number.
800-228-5487
PL
µ
S Controllers Enhance PLC Systems
Figure 1
2
(112 Seiten)
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