1128600
SmartPAC 2 with WPC 2000 Integration User Manual
5-18
Program Mode
Yellow Sensors
Yellow sensors, which are normally open to ground, are ideally suited to monitor events like
stock buckling, end of stock, or die overload. When a yellow sensor closes, SmartPAC 2
sends a Stop command to the press. Because yellow sensors work independently of the
crankshaft angle and do not actuate on every stroke, you do not set a Ready signal for them.
Red Sensors
Red sensors, which are normally closed to ground, are used to monitor the same events as
yellow sensors: die overloads, end of stock, and buckling. A Stop command is sent to the
press when the red sensor opens. No Ready signal is set for red sensors.
Green Sensors
Green sensors, which are normally open, are used to monitor events that must occur during a
certain portion of each stroke or intermittently every designated number of strokes. Examples
are part ejection, stock feed, and part transfer. SmartPAC 2 stops the press when the green
sensor closes to ground.
Any sensor set to green, green quick check, or green constant must actuate during the Ready
signal.
Depending on the type of green sensor, the Ready signal is set either a little longer or a little
shorter than the actuation time.
The four types of green sensors are described below.
Green Sensors
A sensor input set to “green” must turn on during the Ready signal and turn off before the next
Ready signal (see Figure 5-17).
Figure 5-17. Ready Signal Programming for a “Green” Sensor
OK
Sensor ON only
inside ready signal.
TDC
BDC
not allowed
(press stops)
Sensor never goes
OFF.
Stop signal sent at
beginning of ready
signal.
TDC
BDC
Sensor never goes
ON.
Stop signal sent at
end of ready signal.
TDC
BDC
not allowed
(press stops)
OK
Sensor is ON
inside ready signal
and stays on for a
time after the end of
ready signal, but
turns OFF before
next ready signal.
TDC
BDC
KEY
= Sensor
ON
= Ready
Signal
Green Sensor
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Страница 440: ...1128600 SmartPAC 2 with WPC 2000 Integration User Manual D 12 Updating SmartPAC 2 Firmware ...
Страница 478: ...1128600 SmartPAC 2 with WPC 2000 Integration User Manual G 6 Replacing SmartPAC 2 PC Board ...
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