SELF TEST
The self-test feature can be activated without affecting the count. This test
will verify that the LCD digits operate, the DIP switch settings and relay
operation can also be checked.
To enter the self-test, perform the following (Front panel reset must be
enabled).
1. Press and hold the E button, then press the R button.
2. Release both buttons.
The display will cycle all the digits on the display each for about half a
second and in the sequence shown below. To rapidly advance through the
display routine, continually press and release the “P” or the “E” button.
DIGITS CYCLED ON THE DISPLAY
000000
111111
222222
333333
444444
555555
666666
777777
888888
999999
BLANK DISPLAY
101010
121212
323232
343434
545454
565656
767676
787878
989898
The next portion of the self-test corresponds to the position of the DIP
switches. The four DIP switch positions are indicated on the display.
The most significant digit (MSD) corresponds to position one and the least
significant digit to position four of the DIP switches. The MSD will always be
a “1” regardless of the switch setting. The other three digits will be a “1” if the
switch is on or a “0” if the switch is off. Switches can be toggled at this stage
of the test and the display will indicate the change.
If an input signal is applied during the test, be aware that as the DIP switch
positions change, the count mode operation matches the switch settings
immediately.
During the DIP switch test, the Output Relay Test can be performed. Press
and hold the E button to cause the Normally Open relay to close. Releasing and
pressing the E button can be performed as many times as desired. If the relay
was already closed pressing the E button will not change the state, until the
button is released. If testing of the relay is not desired, press the “P” button to
exit self-test.
Note: If the relay test is not performed, the state of the relay will remain the
same as it was prior to self-test. If the relay is tested, the relay output will be
open after exiting self-test, regardless of the mode selection. A manual reset
should be performed if necessary.
Caution
: The operator should know that the relay test will close the contacts.
Therefore be aware of any hazardous or undesirable conditions in the
operating system.
The unit will automatically return to the normal operating mode if a DIP
switch or the enter button is not used within 15 seconds.
TYPICAL APPLICATIONS
CONTROLLING LENGTH OF MATERIAL
A CUB Controller is used to control the length of a fine wire that is wound
onto a large spool. When the desired amount of wire is wound onto the spool,
the Controller stops the system.
The Controller is set-up for Mode 0 operation (Latch output at preset,
manual reset to zero). A Model LSC sensor, with an open collector output and
a 10 pulse per foot wheel, is used to generate signals for the Controller. The
output of the sensor is directly connected to the input of the Controller.
With a signal of 10 pulses per foot of wire and 10,000 feet of wire to be
wound on each spool, the preset is set for 100,000. The Controller is set for
high frequency operation, due to the 20 feet per second speed at which the
system operates.
When the preset value is reached, the output relay closes, and stops the
system drive. The operator then cuts the wire, changes the spool, resets the
Controller, and restarts the process. This system is set up with remote reset
capabilities which will allow the operator to reset the Controller from the wire
cutting station. The Front Panel reset is disabled which prevents resetting of
the count from the front panel.
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
