IAI America ERC3 - Manual (Page 136)

Chapter 3 Wiring
3.4 MEC Mode 1 (Operation with PLC)
126
[3] List of PIO Signals
The table below lists the functions of PIO signals. Refer to Section 4.4 [6] and [7] for the details
of the control for each signal.
Function
Stopping at 2 points
(2-point positioning)
Stopping at 3 points
(3-point positioning) Signal
Type
Signal Name
Contents of
Signals Movement by 1 input
between 2 points
[Single-solenoid mode]
Movement by 2 input
between 2 points
[Double-solenoid mode]
Movement by 2 input
between 3 points
[3-point positioning]
ST0
Move Signal
1
Positioning starts towards
the end point when the ON
level is detected.
Positioning starts towards
the start point when the
OFF level is detected.
ST1
Move Signal
2
Positioning starts towards
the corresponding point
when the ON level is
detected.
Moving to end point with
ST0 = OFF and ST1 = ON
Moving to start point with
ST0 = ON and ST1 = OFF
Caution
Set to [Both ON for
intermediate movement
method] in the initial
settings. Have the
interlock activated so ST0
and ST1 cannot be turned
ON at the same time. A
positioning at the
intermediate point is
performed if both are
turned ON.
Positioning starts towards
the corresponding point
when the ON level is
detected.
Moving to end point with
ST0 = OFF and ST1 = ON
Moving to start point with
ST0 = ON and ST1 = OFF
[Intermediate Point
Movement = Both ON]
Moving to intermediate
point with ST0 = ON and
ST1 = ON
Stop during operation with
ST0 = OFF and
ST1 = OFF
[Intermediate Point
Movement = Both OFF]
Moving to intermediate
point with ST0 = OFF and
ST1 = OFF
Stop during operation with
ST0 = ON and ST1 = ON
Input
RES Reset An alarm will be reset when this signal is turned ON.
LS0
Start Point
Detection
LS1
End Point
Detection
Not
used
LS2
Intermediate
Point
Detection
The same operation as of the sensor of the air cylinder is performed.
It is turned ON when the current position is within the positioning width for each
position detection output.
PE0
Start Point
Positioning
Complete
PE1
End Point
Positioning
Complete P
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ss
in
g F
un
ct
io
n
Use
PE2
Intermediate
Point
Positioning
Complete
It turns ON when the pressing or the positioning is complete.
(It also turns ON even with a miss-operation.)
It turns OFF with a movement signal to another point.
HEND
Home Return
Completion
This signal is turned ON when the home return operation is completed. This signal
will not exist when 3-point stop (3-point positioning) is selected as the operation
pattern.
Output
*ALM
Alarm Output
Signal
This signal is turned ON when the controller is in the normal condition and turned
OFF when the controller is in the alarm condition.
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