IAI America ERC3 - Manual (Page 248)

Chapter 4 Operation
4.2 Operation in Positioner Mode
4.2.3 Operation in Positioner Mode 2 (Operation Using PIO Converter)
238
[8] Direct Position Specification (Solenoid Valve Mode 2)
= Operations of PIO Pattern 5 in PIO Converter
The start signal is provided for every position number. By only turning ON the input signal
corresponding to the 3-point positioning position, an operation becomes available with the data
of the target position number. The operation mode is called the solenoid valve mode because
solenoid valves can directly drive air cylinders. At invasion of the actuator into the positioning
width set for each position, the output signal is turned ON in the operation of any position
number or manual operation of the actuator in servo OFF status as if a sensor were installed.
Positioning and speed change during operation are possible. Their control methods are the
same as those of other patterns.
Caution: This pattern does not allow pressing and pitch feed.
(1) Home return (ST0, HEND)
For PIO converter, the PIO input and output for the position numbers before the home return
operation is changed as shown below;
Position No. Input Output
0 ST0 LS0
1 ST1 Ÿ JOG+ LS1
2 ST2 Ÿ Disable LS2 Ÿ Disable
After a home-return operation, while the start signal ST0 is ON, home-return operation and the
start signal ST1 work as the function of JOG+. By using this function, move the actuator to a
position at which home return can be done safely. The speed of ST1 is the home return speed.
After the home return is fully prepared, turn the ST0 signal ON to start the home return. At the
completion of the home return, home return complete signal HEND is turned ON. Turn the ST0
signal OFF if HEND is turned ON. HEND remains ON unless the home is lose due to
occurrence of an alarm.
If a certain home positioning precision is required, Set “Position” of position No.0 to 0 mm and
the ST0 signal is not changed by the HEND signal to remain ON. After the home return is
completed, positioning is provided for position No.0. [Refer to (3) Positioning in this section.]
Warning: (1) Use this pattern with Parameter No.27 “Move command type” set to “0”
(factory setting). When Parameter No.27 is set to “1”, the home return is
started as soon as the ST0 signal is turned ON and the operation cannot be
stopped even if ST0 is turned OFF.
(2) If “Position” in position No.0 is set to other than 0mm, the operation is
continued without change to provide positioning after home return.
Home return signal
ST0
(PLCoController)
If a certain precision is required. Set
“Position” of position No.0 to 0 mm and
ST0 is not chaged by HEND to remain ON.
Homing completion signal
HEND
(ControlleroPLC)