Electro Cam PS-6144 Series - Manual (Page 8)

1-4 Introduction
Speed Compensation Speed compensation advances the setpoints for an output as machine speed increases.
This eliminates the need to manually adjust the setpoints for fixed-response devices
when machine speeds are changed. Speed compensation provides greater accuracy,
higher production speeds, and reduced downtime for machine adjustment.
Motion ANDing Two speed ranges can be programmed into the controller, and outputs can be ANDed
with either speed range so that they will be disabled unless the machine speed is within
the range. A common use for this feature is disabling outputs to glue valves to turn off
glue flow if the machine stops.
Timed Outputs Timed outputs are programmed like standard outputs to turn on and off at specific
points of resolver rotation. However, once a timed output is on, it will remain on for a
specified time period, regardless of RPM. If the programmed “off” position is reached
before the time period passes, the output will turn off. Timed outputs are used to drive
devices such as pneumatic cylinders which require a fixed time to perform a task, re-
gardless of machine speed.
Analog Outputs PS-6144 controllers can drive two analog output modules whose output signals will be
linearly proportional to RPM. The analog signal level at zero RPM can be programmed,
as well as the RPM that corresponds to maximum signal. No measuring equipment is
required for initial setup, and calibration is not needed. Typical uses for the analog
output are to control glue pressure as machine speeds change, or to match speeds of
other equipment to the machine being controlled by the PS-6144.
Serial Communication Using Electro Cam Corp.’s PLuSNET software for IBM-PC compatible computers, the
controller’s entire program can be saved to a disk file or loaded from a disk file to the
controller. The program can be printed or edited using the computer. Individual com-
mands may also be sent to the controller to change settings while running.
PS-6144 Optional Features
(-F) Large Program Memory Depending on the number of outputs used, standard controls can store 48 programs
consisting of not more than 1258 total output pulses. Controls with the “-F” option can
store up to 256 programs consisting of not more than 4589 output pulses.
(-G) Gray Code Output This option provides eight bits of position information on outputs one through eight.
This “gray code” output can provide position information to a PLC or other electronic
control device without the use of expensive PLC accessory cards. The PLC can then
make control decisions that do not demand a fast response, while other PLuS outputs
directly control devices that must operate accurately at high machine speeds.
(-G10) Gray Code Output This option provides ten bits of position information on outputs one through ten.
(-H) High Resolution Controls with this option can divide one resolver revolution into as many as 4096 incre-
ments. Standard controls use 1024 increments maximum. The “-H” Option allows higher
Scale Factors to be used. For example, a Scale Factor of 3600 would allow program-
ming in 0.1 degree increments. Or, for an application in which one revolution equals 24"
of linear travel, a Scale Factor of 2400 would result in increments equal to .01" of travel.
(-L) Leading/Trailing The “-L” option allows the “on” and “off” edges of output pulses to be
Edge Speed Comp speed compensated by different amounts. This option is used for devices whose “on”
and “off” response times are significantly different. High speed gluing is a common
application requiring separate leading/trailing edge speed compensation. See Section
4 for details.
(-MSV) Master/Slave Master/Slave resolver mode for multiple controllers used with one resolver.
(-MB) Modbus™ Modbus™ ASCII protocol for serial communications.
(-V) Vibration Coating Vibration protective coating for extra protection against shock and vibration.
(-W) Washdown Boot Keypads with the “-W” option are rated NEMA 4X and are shipped with a clear silicon
rubber boot fitted over and around the keyboard area. In addition to preventing con-
tamination from harsh chemicals, the boot also protects the keyboard from grease, oil,
dirt and normal wear that could otherwise shorten the life of the keyboard.
PS-6144 Standard Features (Cont'd)