1-7 Introduction
Basic Terminology
The following terms will be used throughout this manual to explain PS-6244 installation,
programming and operation:
Outputs (channels)
An “output,” or “output channel,” refers to an external circuit that the PS-6244 controls
based on encoder position or speed. Outputs can be one of two types:
Switching outputs turn circuits on or off.
Analog outputs generate a control signal that is proportional to RPM.
Setpoints
“Setpoints” are the points within one rotation of the encoder at which an output channel
turns on or off. Setpoints can be programmed into an output channel through the key-
pad/display, or they can be downloaded from a computer or PLC through serial com-
munications. The PS-6244 can turn any given output on and off multiple times within
one rotation.
Pulses
A “pulse” is the “on” period between the time an output is turned on and off. The “on”
point is the leading edge of the pulse, and the “off” point is the trailing edge. When
multiple “on” and “off” points are programmed into one output channel, the output is
said to have multiple pulses.
Programs
Suppose that 15 output channels on a cartoner are programmed with setpoints to fold
and glue a certain size carton. These settings could be stored as a “program.” Then, the
15 output channels could be re-programmed with different setpoints for a different size
carton. This second set of setpoints could also be stored as a program. To change
carton sizes, an operator could simply activate the correct program, and the corre-
sponding setpoints would take effect.
The use of programs can provide tremendous advantages over mechanical cam switch-
es. Standard PS-6244’s can store up to 48 programs. The active program can be se-
lected through the keypad/display, mechanical switches, direct PLC interface, or serial
communication messages.
Inputs (hardware inputs)
In addition to accepting a signal from the encoder, the PS-6244 can accept up to 16
input signals from mechanical switches, relay contacts, DC two- or three-wire sensors,
solid state DC output modules, or PLC DC outputs. The PS-6244 hardware inputs are
dedicated to specific functions involving program selection and controlling output chan-
nels based on sensor signals.
